./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pnr5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/pnr5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G --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 c6dc18f387244e600c9c46c5a67fb3c0c9875a9a14eb13d3a621343f4a214b0b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:51:02,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:51:02,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:51:03,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:51:03,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:51:03,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:51:03,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:51:03,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:51:03,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:51:03,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:51:03,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:51:03,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:51:03,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:51:03,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:51:03,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:51:03,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:51:03,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:51:03,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:51:03,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:51:03,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:51:03,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:51:03,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:51:03,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:51:03,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:51:03,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:51:03,090 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:51:03,090 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:51:03,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:51:03,092 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:51:03,094 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:51:03,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:51:03,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:51:03,098 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:51:03,099 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:51:03,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:51:03,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:51:03,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:51:03,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:51:03,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:51:03,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:51:03,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:51:03,105 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:51:03,147 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:51:03,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:51:03,148 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:51:03,148 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:51:03,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:51:03,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:51:03,150 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:51:03,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:51:03,150 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:51:03,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:51:03,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:51:03,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:51:03,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:51:03,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:51:03,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:51:03,153 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:51:03,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:51:03,153 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:51:03,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:51:03,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:51:03,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:51:03,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:51:03,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:51:03,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:51:03,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:51:03,155 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:51:03,156 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:51:03,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:51:03,156 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:51:03,158 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:51:03,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:51:03,158 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:51:03,158 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_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6dc18f387244e600c9c46c5a67fb3c0c9875a9a14eb13d3a621343f4a214b0b [2021-11-23 13:51:03,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:51:03,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:51:03,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:51:03,518 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:51:03,519 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:51:03,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-tiling/pnr5.c [2021-11-23 13:51:03,615 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/data/1e5110d7f/77b6f6edaeec4d088ef7525c5f03f97a/FLAG2895d1cb1 [2021-11-23 13:51:04,157 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:51:04,159 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/sv-benchmarks/c/array-tiling/pnr5.c [2021-11-23 13:51:04,171 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/data/1e5110d7f/77b6f6edaeec4d088ef7525c5f03f97a/FLAG2895d1cb1 [2021-11-23 13:51:04,525 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/data/1e5110d7f/77b6f6edaeec4d088ef7525c5f03f97a [2021-11-23 13:51:04,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:51:04,529 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:51:04,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:51:04,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:51:04,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:51:04,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:51:04" (1/1) ... [2021-11-23 13:51:04,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@379ddbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04, skipping insertion in model container [2021-11-23 13:51:04,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:51:04" (1/1) ... [2021-11-23 13:51:04,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:51:04,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:51:04,826 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_73fd1c26-8213-414d-a60d-ba074d2321ad/sv-benchmarks/c/array-tiling/pnr5.c[395,408] [2021-11-23 13:51:04,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:51:04,888 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:51:04,906 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_73fd1c26-8213-414d-a60d-ba074d2321ad/sv-benchmarks/c/array-tiling/pnr5.c[395,408] [2021-11-23 13:51:04,934 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:51:04,960 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:51:04,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04 WrapperNode [2021-11-23 13:51:04,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:51:04,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:51:04,965 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:51:04,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:51:04,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04" (1/1) ... [2021-11-23 13:51:04,993 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04" (1/1) ... [2021-11-23 13:51:05,034 INFO L137 Inliner]: procedures = 17, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 123 [2021-11-23 13:51:05,035 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:51:05,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:51:05,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:51:05,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:51:05,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04" (1/1) ... [2021-11-23 13:51:05,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04" (1/1) ... [2021-11-23 13:51:05,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04" (1/1) ... [2021-11-23 13:51:05,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04" (1/1) ... [2021-11-23 13:51:05,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04" (1/1) ... [2021-11-23 13:51:05,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04" (1/1) ... [2021-11-23 13:51:05,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04" (1/1) ... [2021-11-23 13:51:05,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:51:05,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:51:05,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:51:05,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:51:05,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04" (1/1) ... [2021-11-23 13:51:05,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:51:05,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:51:05,136 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:51:05,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:51:05,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:51:05,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:51:05,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 13:51:05,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 13:51:05,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:51:05,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:51:05,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 13:51:05,270 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:51:05,273 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:51:05,550 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:51:05,556 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:51:05,556 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 13:51:05,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:51:05 BoogieIcfgContainer [2021-11-23 13:51:05,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:51:05,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:51:05,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:51:05,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:51:05,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:51:04" (1/3) ... [2021-11-23 13:51:05,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be712ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:51:05, skipping insertion in model container [2021-11-23 13:51:05,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04" (2/3) ... [2021-11-23 13:51:05,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be712ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:51:05, skipping insertion in model container [2021-11-23 13:51:05,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:51:05" (3/3) ... [2021-11-23 13:51:05,567 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr5.c [2021-11-23 13:51:05,572 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:51:05,573 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 13:51:05,656 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:51:05,666 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 13:51:05,666 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 13:51:05,690 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 32 states have internal predecessors, (45), 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) [2021-11-23 13:51:05,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 13:51:05,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:51:05,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:51:05,700 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:51:05,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:51:05,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1300179275, now seen corresponding path program 1 times [2021-11-23 13:51:05,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:51:05,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096075310] [2021-11-23 13:51:05,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:51:05,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:51:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:05,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:51:05,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096075310] [2021-11-23 13:51:05,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096075310] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:51:05,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:51:05,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:51:05,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627386759] [2021-11-23 13:51:05,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:51:05,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 13:51:05,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:51:05,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 13:51:05,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:51:05,902 INFO L87 Difference]: Start difference. First operand has 33 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 32 states have internal predecessors, (45), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-11-23 13:51:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:51:05,929 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2021-11-23 13:51:05,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 13:51:05,932 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2021-11-23 13:51:05,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:51:05,940 INFO L225 Difference]: With dead ends: 61 [2021-11-23 13:51:05,940 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 13:51:05,943 INFO L932 BasicCegarLoop]: 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 [2021-11-23 13:51:05,950 INFO L933 BasicCegarLoop]: 41 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, 41 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 [2021-11-23 13:51:05,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:51:05,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 13:51:05,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-23 13:51:05,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 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) [2021-11-23 13:51:05,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-11-23 13:51:05,995 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 11 [2021-11-23 13:51:05,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:51:05,995 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-11-23 13:51:05,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-11-23 13:51:05,996 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-11-23 13:51:05,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 13:51:05,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:51:05,997 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:51:05,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:51:05,998 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:51:05,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:51:05,999 INFO L85 PathProgramCache]: Analyzing trace with hash 474828087, now seen corresponding path program 1 times [2021-11-23 13:51:05,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:51:05,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558432435] [2021-11-23 13:51:05,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:51:06,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:51:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:06,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:51:06,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558432435] [2021-11-23 13:51:06,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558432435] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:51:06,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:51:06,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:51:06,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967363250] [2021-11-23 13:51:06,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:51:06,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:51:06,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:51:06,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:51:06,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:51:06,274 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-11-23 13:51:06,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:51:06,414 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2021-11-23 13:51:06,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:51:06,415 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 11 [2021-11-23 13:51:06,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:51:06,416 INFO L225 Difference]: With dead ends: 52 [2021-11-23 13:51:06,416 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 13:51:06,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:51:06,419 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 72 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:51:06,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 34 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:51:06,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 13:51:06,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2021-11-23 13:51:06,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:51:06,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-11-23 13:51:06,432 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 11 [2021-11-23 13:51:06,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:51:06,432 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-11-23 13:51:06,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-11-23 13:51:06,433 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-11-23 13:51:06,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 13:51:06,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:51:06,434 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:51:06,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:51:06,435 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:51:06,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:51:06,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1172571519, now seen corresponding path program 1 times [2021-11-23 13:51:06,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:51:06,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279971545] [2021-11-23 13:51:06,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:51:06,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:51:06,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:07,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:51:07,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279971545] [2021-11-23 13:51:07,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279971545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:51:07,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926146979] [2021-11-23 13:51:07,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:51:07,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:07,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:51:07,096 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:51:07,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:51:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:07,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 13:51:07,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:51:07,362 INFO L388 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 20 treesize of output 16 [2021-11-23 13:51:07,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:07,447 INFO L388 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 29 treesize of output 28 [2021-11-23 13:51:07,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:07,508 INFO L388 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 29 treesize of output 28 [2021-11-23 13:51:07,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:07,566 INFO L388 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 29 treesize of output 28 [2021-11-23 13:51:07,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:07,637 INFO L388 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 21 treesize of output 20 [2021-11-23 13:51:07,772 INFO L388 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 37 treesize of output 29 [2021-11-23 13:51:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:07,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:51:08,075 INFO L388 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 13 [2021-11-23 13:51:08,080 INFO L388 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 26 [2021-11-23 13:51:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:08,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926146979] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:51:08,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:51:08,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2021-11-23 13:51:08,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159008841] [2021-11-23 13:51:08,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:51:08,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 13:51:08,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:51:08,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 13:51:08,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-11-23 13:51:08,169 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:51:09,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:51:09,131 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2021-11-23 13:51:09,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 13:51:09,132 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-23 13:51:09,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:51:09,134 INFO L225 Difference]: With dead ends: 118 [2021-11-23 13:51:09,134 INFO L226 Difference]: Without dead ends: 116 [2021-11-23 13:51:09,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 13:51:09,136 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 325 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:51:09,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 213 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 13:51:09,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-23 13:51:09,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 32. [2021-11-23 13:51:09,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 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) [2021-11-23 13:51:09,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-11-23 13:51:09,146 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 27 [2021-11-23 13:51:09,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:51:09,147 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-11-23 13:51:09,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:51:09,147 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-11-23 13:51:09,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 13:51:09,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:51:09,148 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:51:09,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 13:51:09,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:09,364 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:51:09,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:51:09,365 INFO L85 PathProgramCache]: Analyzing trace with hash 128154615, now seen corresponding path program 1 times [2021-11-23 13:51:09,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:51:09,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299642351] [2021-11-23 13:51:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:51:09,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:51:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:09,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:51:09,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299642351] [2021-11-23 13:51:09,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299642351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:51:09,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624405706] [2021-11-23 13:51:09,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:51:09,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:09,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:51:09,627 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:51:09,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 13:51:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:09,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 13:51:09,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:51:09,780 INFO L388 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 21 treesize of output 17 [2021-11-23 13:51:09,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:09,821 INFO L388 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 30 treesize of output 29 [2021-11-23 13:51:09,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:09,869 INFO L388 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 30 treesize of output 29 [2021-11-23 13:51:09,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:09,922 INFO L388 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 24 treesize of output 23 [2021-11-23 13:51:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:10,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:51:10,164 INFO L388 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 17 treesize of output 15 [2021-11-23 13:51:10,166 INFO L388 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 30 treesize of output 26 [2021-11-23 13:51:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:10,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624405706] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:51:10,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:51:10,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 14 [2021-11-23 13:51:10,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730433445] [2021-11-23 13:51:10,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:51:10,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 13:51:10,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:51:10,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 13:51:10,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:51:10,205 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 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) [2021-11-23 13:51:10,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:51:10,608 INFO L93 Difference]: Finished difference Result 139 states and 175 transitions. [2021-11-23 13:51:10,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 13:51:10,609 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 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 31 [2021-11-23 13:51:10,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:51:10,611 INFO L225 Difference]: With dead ends: 139 [2021-11-23 13:51:10,612 INFO L226 Difference]: Without dead ends: 137 [2021-11-23 13:51:10,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-11-23 13:51:10,613 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 233 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:51:10,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 188 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:51:10,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-23 13:51:10,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 53. [2021-11-23 13:51:10,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 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) [2021-11-23 13:51:10,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2021-11-23 13:51:10,626 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 31 [2021-11-23 13:51:10,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:51:10,627 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2021-11-23 13:51:10,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 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) [2021-11-23 13:51:10,627 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2021-11-23 13:51:10,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 13:51:10,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:51:10,629 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:51:10,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:51:10,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:10,854 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:51:10,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:51:10,855 INFO L85 PathProgramCache]: Analyzing trace with hash -689493835, now seen corresponding path program 1 times [2021-11-23 13:51:10,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:51:10,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997811179] [2021-11-23 13:51:10,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:51:10,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:51:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:11,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:51:11,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997811179] [2021-11-23 13:51:11,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997811179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:51:11,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268997106] [2021-11-23 13:51:11,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:51:11,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:11,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:51:11,233 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:51:11,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 13:51:11,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:11,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 13:51:11,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:51:11,420 INFO L388 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 20 treesize of output 16 [2021-11-23 13:51:11,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:11,509 INFO L388 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 29 treesize of output 28 [2021-11-23 13:51:11,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:11,565 INFO L388 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 29 treesize of output 28 [2021-11-23 13:51:11,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:11,608 INFO L388 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 [2021-11-23 13:51:11,761 INFO L388 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 37 treesize of output 29 [2021-11-23 13:51:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:11,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:51:11,995 INFO L388 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 17 treesize of output 15 [2021-11-23 13:51:11,998 INFO L388 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 30 [2021-11-23 13:51:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:12,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268997106] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:51:12,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:51:12,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 23 [2021-11-23 13:51:12,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976789999] [2021-11-23 13:51:12,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:51:12,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 13:51:12,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:51:12,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 13:51:12,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-11-23 13:51:12,083 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 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) [2021-11-23 13:51:13,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:51:13,461 INFO L93 Difference]: Finished difference Result 221 states and 279 transitions. [2021-11-23 13:51:13,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 13:51:13,462 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-23 13:51:13,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:51:13,464 INFO L225 Difference]: With dead ends: 221 [2021-11-23 13:51:13,464 INFO L226 Difference]: Without dead ends: 219 [2021-11-23 13:51:13,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 49 SyntacticMatches, 8 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=483, Invalid=1869, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 13:51:13,467 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 263 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:51:13,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 585 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 13:51:13,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-23 13:51:13,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 74. [2021-11-23 13:51:13,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 73 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:51:13,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2021-11-23 13:51:13,483 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 31 [2021-11-23 13:51:13,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:51:13,484 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2021-11-23 13:51:13,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 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) [2021-11-23 13:51:13,485 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2021-11-23 13:51:13,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 13:51:13,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:51:13,486 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:51:13,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 13:51:13,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:13,708 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:51:13,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:51:13,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1510036077, now seen corresponding path program 2 times [2021-11-23 13:51:13,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:51:13,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951076384] [2021-11-23 13:51:13,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:51:13,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:51:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:13,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:51:13,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951076384] [2021-11-23 13:51:13,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951076384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:51:13,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324270117] [2021-11-23 13:51:13,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:51:13,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:13,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:51:13,851 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:51:13,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 13:51:13,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:51:13,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:51:13,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 13:51:13,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:51:13,956 INFO L388 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 21 treesize of output 17 [2021-11-23 13:51:13,985 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-23 13:51:13,986 INFO L388 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 30 treesize of output 29 [2021-11-23 13:51:14,012 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-23 13:51:14,012 INFO L388 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 24 treesize of output 23 [2021-11-23 13:51:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:14,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:51:14,206 INFO L388 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 17 treesize of output 15 [2021-11-23 13:51:14,210 INFO L388 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 30 treesize of output 26 [2021-11-23 13:51:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:14,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324270117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:51:14,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:51:14,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2021-11-23 13:51:14,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392053477] [2021-11-23 13:51:14,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:51:14,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 13:51:14,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:51:14,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 13:51:14,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:51:14,237 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 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) [2021-11-23 13:51:14,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:51:14,727 INFO L93 Difference]: Finished difference Result 413 states and 540 transitions. [2021-11-23 13:51:14,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 13:51:14,728 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 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 35 [2021-11-23 13:51:14,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:51:14,730 INFO L225 Difference]: With dead ends: 413 [2021-11-23 13:51:14,730 INFO L226 Difference]: Without dead ends: 411 [2021-11-23 13:51:14,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-11-23 13:51:14,732 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 183 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:51:14,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 238 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:51:14,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-11-23 13:51:14,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 175. [2021-11-23 13:51:14,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.3160919540229885) internal successors, (229), 174 states have internal predecessors, (229), 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) [2021-11-23 13:51:14,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 229 transitions. [2021-11-23 13:51:14,775 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 229 transitions. Word has length 35 [2021-11-23 13:51:14,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:51:14,780 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 229 transitions. [2021-11-23 13:51:14,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 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) [2021-11-23 13:51:14,780 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 229 transitions. [2021-11-23 13:51:14,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 13:51:14,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:51:14,788 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:51:14,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 13:51:15,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:15,006 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:51:15,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:51:15,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1932737903, now seen corresponding path program 1 times [2021-11-23 13:51:15,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:51:15,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474462308] [2021-11-23 13:51:15,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:51:15,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:51:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:15,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:15,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:51:15,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474462308] [2021-11-23 13:51:15,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474462308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:51:15,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629215993] [2021-11-23 13:51:15,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:51:15,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:15,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:51:15,206 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:51:15,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 13:51:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:15,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 13:51:15,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:51:15,389 INFO L388 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 20 treesize of output 16 [2021-11-23 13:51:15,439 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-23 13:51:15,439 INFO L388 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 29 treesize of output 28 [2021-11-23 13:51:15,472 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-23 13:51:15,472 INFO L388 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 23 treesize of output 22 [2021-11-23 13:51:15,627 INFO L388 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 41 treesize of output 29 [2021-11-23 13:51:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:15,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:51:15,853 INFO L388 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 17 treesize of output 15 [2021-11-23 13:51:15,855 INFO L388 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 30 [2021-11-23 13:51:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:15,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629215993] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:51:15,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:51:15,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2021-11-23 13:51:15,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566298901] [2021-11-23 13:51:15,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:51:15,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 13:51:15,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:51:15,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 13:51:15,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-11-23 13:51:15,959 INFO L87 Difference]: Start difference. First operand 175 states and 229 transitions. Second operand has 23 states, 23 states have (on average 4.260869565217392) internal successors, (98), 23 states have internal predecessors, (98), 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) [2021-11-23 13:51:17,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:51:17,773 INFO L93 Difference]: Finished difference Result 640 states and 836 transitions. [2021-11-23 13:51:17,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-23 13:51:17,774 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.260869565217392) internal successors, (98), 23 states have internal predecessors, (98), 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 35 [2021-11-23 13:51:17,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:51:17,779 INFO L225 Difference]: With dead ends: 640 [2021-11-23 13:51:17,780 INFO L226 Difference]: Without dead ends: 638 [2021-11-23 13:51:17,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=723, Invalid=2937, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 13:51:17,783 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 300 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 13:51:17,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 804 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 13:51:17,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-11-23 13:51:17,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 84. [2021-11-23 13:51:17,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.2650602409638554) internal successors, (105), 83 states have internal predecessors, (105), 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) [2021-11-23 13:51:17,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-11-23 13:51:17,809 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 35 [2021-11-23 13:51:17,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:51:17,810 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-11-23 13:51:17,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.260869565217392) internal successors, (98), 23 states have internal predecessors, (98), 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) [2021-11-23 13:51:17,810 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-11-23 13:51:17,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 13:51:17,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:51:17,815 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:51:17,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 13:51:18,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:18,022 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:51:18,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:51:18,023 INFO L85 PathProgramCache]: Analyzing trace with hash 67304931, now seen corresponding path program 3 times [2021-11-23 13:51:18,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:51:18,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67775769] [2021-11-23 13:51:18,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:51:18,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:51:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:18,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:51:18,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67775769] [2021-11-23 13:51:18,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67775769] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:51:18,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731280163] [2021-11-23 13:51:18,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:51:18,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:18,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:51:18,228 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:51:18,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 13:51:18,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 13:51:18,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:51:18,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 13:51:18,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:51:18,410 INFO L388 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 21 treesize of output 17 [2021-11-23 13:51:18,452 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-23 13:51:18,452 INFO L388 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 34 treesize of output 33 [2021-11-23 13:51:18,516 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-11-23 13:51:18,517 INFO L388 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 3 case distinctions, treesize of input 47 treesize of output 49 [2021-11-23 13:51:18,606 INFO L354 Elim1Store]: treesize reduction 177, result has 17.3 percent of original size [2021-11-23 13:51:18,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 65 [2021-11-23 13:51:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:18,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:51:19,323 INFO L388 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 51 treesize of output 47 [2021-11-23 13:51:19,327 INFO L388 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 352 treesize of output 336 [2021-11-23 13:51:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:19,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731280163] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:51:19,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:51:19,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10] total 27 [2021-11-23 13:51:19,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289396532] [2021-11-23 13:51:19,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:51:19,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-23 13:51:19,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:51:19,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-23 13:51:19,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-11-23 13:51:19,416 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 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) [2021-11-23 13:51:20,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:51:20,425 INFO L93 Difference]: Finished difference Result 219 states and 277 transitions. [2021-11-23 13:51:20,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-23 13:51:20,426 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 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) Word has length 39 [2021-11-23 13:51:20,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:51:20,427 INFO L225 Difference]: With dead ends: 219 [2021-11-23 13:51:20,428 INFO L226 Difference]: Without dead ends: 217 [2021-11-23 13:51:20,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 10 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=632, Invalid=2908, Unknown=0, NotChecked=0, Total=3540 [2021-11-23 13:51:20,440 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 306 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:51:20,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 347 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 317 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2021-11-23 13:51:20,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-23 13:51:20,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 116. [2021-11-23 13:51:20,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.2608695652173914) internal successors, (145), 115 states have internal predecessors, (145), 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) [2021-11-23 13:51:20,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 145 transitions. [2021-11-23 13:51:20,470 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 145 transitions. Word has length 39 [2021-11-23 13:51:20,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:51:20,470 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 145 transitions. [2021-11-23 13:51:20,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 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) [2021-11-23 13:51:20,471 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 145 transitions. [2021-11-23 13:51:20,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 13:51:20,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:51:20,473 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:51:20,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 13:51:20,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:20,698 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:51:20,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:51:20,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1621638811, now seen corresponding path program 1 times [2021-11-23 13:51:20,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:51:20,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827790842] [2021-11-23 13:51:20,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:51:20,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:51:20,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:20,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:51:20,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827790842] [2021-11-23 13:51:20,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827790842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:51:20,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847388839] [2021-11-23 13:51:20,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:51:20,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:20,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:51:20,862 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:51:20,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 13:51:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:20,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 13:51:20,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:51:20,963 INFO L388 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 21 treesize of output 17 [2021-11-23 13:51:20,999 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-23 13:51:20,999 INFO L388 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 24 treesize of output 23 [2021-11-23 13:51:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:21,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:51:21,253 INFO L388 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 17 treesize of output 15 [2021-11-23 13:51:21,257 INFO L388 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 30 treesize of output 26 [2021-11-23 13:51:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:21,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847388839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:51:21,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:51:21,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2021-11-23 13:51:21,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614687700] [2021-11-23 13:51:21,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:51:21,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 13:51:21,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:51:21,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 13:51:21,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-11-23 13:51:21,293 INFO L87 Difference]: Start difference. First operand 116 states and 145 transitions. Second operand has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 21 states have internal predecessors, (93), 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) [2021-11-23 13:51:23,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:51:23,207 INFO L93 Difference]: Finished difference Result 1105 states and 1444 transitions. [2021-11-23 13:51:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-23 13:51:23,207 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 21 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-23 13:51:23,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:51:23,214 INFO L225 Difference]: With dead ends: 1105 [2021-11-23 13:51:23,214 INFO L226 Difference]: Without dead ends: 1103 [2021-11-23 13:51:23,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=684, Invalid=3606, Unknown=0, NotChecked=0, Total=4290 [2021-11-23 13:51:23,218 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 595 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 13:51:23,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 582 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 13:51:23,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-11-23 13:51:23,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 255. [2021-11-23 13:51:23,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.31496062992126) internal successors, (334), 254 states have internal predecessors, (334), 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) [2021-11-23 13:51:23,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 334 transitions. [2021-11-23 13:51:23,275 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 334 transitions. Word has length 39 [2021-11-23 13:51:23,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:51:23,275 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 334 transitions. [2021-11-23 13:51:23,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 21 states have internal predecessors, (93), 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) [2021-11-23 13:51:23,276 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 334 transitions. [2021-11-23 13:51:23,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 13:51:23,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:51:23,277 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:51:23,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 13:51:23,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:23,486 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:51:23,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:51:23,486 INFO L85 PathProgramCache]: Analyzing trace with hash 286159649, now seen corresponding path program 1 times [2021-11-23 13:51:23,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:51:23,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516764534] [2021-11-23 13:51:23,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:51:23,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:51:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:23,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:51:23,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516764534] [2021-11-23 13:51:23,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516764534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:51:23,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893367091] [2021-11-23 13:51:23,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:51:23,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:23,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:51:23,824 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:51:23,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 13:51:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:23,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 13:51:23,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:51:23,993 INFO L388 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 20 treesize of output 16 [2021-11-23 13:51:24,037 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-23 13:51:24,038 INFO L388 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 23 treesize of output 22 [2021-11-23 13:51:24,241 INFO L388 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 41 treesize of output 29 [2021-11-23 13:51:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:24,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:51:24,473 INFO L388 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 17 treesize of output 15 [2021-11-23 13:51:24,475 INFO L388 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 30 [2021-11-23 13:51:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:24,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893367091] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:51:24,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:51:24,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2021-11-23 13:51:24,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241888772] [2021-11-23 13:51:24,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:51:24,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 13:51:24,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:51:24,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 13:51:24,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-11-23 13:51:24,576 INFO L87 Difference]: Start difference. First operand 255 states and 334 transitions. Second operand has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 29 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:51:32,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:51:32,550 INFO L93 Difference]: Finished difference Result 2456 states and 3240 transitions. [2021-11-23 13:51:32,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-11-23 13:51:32,552 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 29 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-23 13:51:32,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:51:32,566 INFO L225 Difference]: With dead ends: 2456 [2021-11-23 13:51:32,567 INFO L226 Difference]: Without dead ends: 2454 [2021-11-23 13:51:32,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10626 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3461, Invalid=24595, Unknown=0, NotChecked=0, Total=28056 [2021-11-23 13:51:32,582 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 994 mSDsluCounter, 2082 mSDsCounter, 0 mSdLazyCounter, 3348 mSolverCounterSat, 853 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 2246 SdHoareTripleChecker+Invalid, 4201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 853 IncrementalHoareTripleChecker+Valid, 3348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:51:32,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [994 Valid, 2246 Invalid, 4201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [853 Valid, 3348 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 13:51:32,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2021-11-23 13:51:32,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 389. [2021-11-23 13:51:32,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.3350515463917525) internal successors, (518), 388 states have internal predecessors, (518), 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) [2021-11-23 13:51:32,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 518 transitions. [2021-11-23 13:51:32,686 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 518 transitions. Word has length 39 [2021-11-23 13:51:32,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:51:32,686 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 518 transitions. [2021-11-23 13:51:32,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 29 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:51:32,687 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 518 transitions. [2021-11-23 13:51:32,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 13:51:32,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:51:32,688 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:51:32,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 13:51:32,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 13:51:32,914 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:51:32,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:51:32,914 INFO L85 PathProgramCache]: Analyzing trace with hash -904318757, now seen corresponding path program 2 times [2021-11-23 13:51:32,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:51:32,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860994413] [2021-11-23 13:51:32,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:51:32,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:51:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:33,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:51:33,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860994413] [2021-11-23 13:51:33,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860994413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:51:33,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49926436] [2021-11-23 13:51:33,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:51:33,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:33,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:51:33,081 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:51:33,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 13:51:33,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:51:33,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:51:33,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 13:51:33,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:51:33,175 INFO L388 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 16 treesize of output 12 [2021-11-23 13:51:33,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:33,221 INFO L388 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 29 treesize of output 28 [2021-11-23 13:51:33,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:33,248 INFO L388 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 29 treesize of output 28 [2021-11-23 13:51:33,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:33,272 INFO L388 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 29 treesize of output 28 [2021-11-23 13:51:33,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:33,295 INFO L388 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 17 treesize of output 17 [2021-11-23 13:51:33,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:51:33,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 27 [2021-11-23 13:51:33,686 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:33,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:51:33,970 INFO L388 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 41 [2021-11-23 13:51:33,974 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 13:51:33,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 267 [2021-11-23 13:51:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:34,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49926436] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:51:34,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:51:34,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 13] total 30 [2021-11-23 13:51:34,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406863750] [2021-11-23 13:51:34,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:51:34,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 13:51:34,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:51:34,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 13:51:34,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-11-23 13:51:34,057 INFO L87 Difference]: Start difference. First operand 389 states and 518 transitions. Second operand has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:51:37,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:51:37,279 INFO L93 Difference]: Finished difference Result 1604 states and 2102 transitions. [2021-11-23 13:51:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-23 13:51:37,280 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-23 13:51:37,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:51:37,291 INFO L225 Difference]: With dead ends: 1604 [2021-11-23 13:51:37,292 INFO L226 Difference]: Without dead ends: 1602 [2021-11-23 13:51:37,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3811 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1749, Invalid=10023, Unknown=0, NotChecked=0, Total=11772 [2021-11-23 13:51:37,300 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 548 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 530 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 530 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:51:37,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 1063 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [530 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 13:51:37,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2021-11-23 13:51:37,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 394. [2021-11-23 13:51:37,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 1.3256997455470738) internal successors, (521), 393 states have internal predecessors, (521), 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) [2021-11-23 13:51:37,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 521 transitions. [2021-11-23 13:51:37,415 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 521 transitions. Word has length 43 [2021-11-23 13:51:37,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:51:37,416 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 521 transitions. [2021-11-23 13:51:37,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:51:37,416 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 521 transitions. [2021-11-23 13:51:37,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 13:51:37,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:51:37,417 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:51:37,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 13:51:37,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 13:51:37,630 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:51:37,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:51:37,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1550308303, now seen corresponding path program 4 times [2021-11-23 13:51:37,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:51:37,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416693892] [2021-11-23 13:51:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:51:37,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:51:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 33 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:37,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:51:37,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416693892] [2021-11-23 13:51:37,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416693892] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:51:37,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680427308] [2021-11-23 13:51:37,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:51:37,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:37,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:51:37,975 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:51:37,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 13:51:38,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:51:38,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:51:38,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 13:51:38,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:51:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:38,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:51:38,834 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:38,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680427308] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:51:38,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:51:38,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2021-11-23 13:51:38,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518160681] [2021-11-23 13:51:38,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:51:38,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 13:51:38,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:51:38,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 13:51:38,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 13:51:38,836 INFO L87 Difference]: Start difference. First operand 394 states and 521 transitions. Second operand has 33 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 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) [2021-11-23 13:51:39,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:51:39,202 INFO L93 Difference]: Finished difference Result 424 states and 550 transitions. [2021-11-23 13:51:39,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 13:51:39,206 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 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 47 [2021-11-23 13:51:39,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:51:39,209 INFO L225 Difference]: With dead ends: 424 [2021-11-23 13:51:39,209 INFO L226 Difference]: Without dead ends: 396 [2021-11-23 13:51:39,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=365, Invalid=1041, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 13:51:39,216 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 251 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:51:39,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 197 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:51:39,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-23 13:51:39,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 394. [2021-11-23 13:51:39,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 1.3155216284987277) internal successors, (517), 393 states have internal predecessors, (517), 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) [2021-11-23 13:51:39,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 517 transitions. [2021-11-23 13:51:39,303 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 517 transitions. Word has length 47 [2021-11-23 13:51:39,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:51:39,303 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 517 transitions. [2021-11-23 13:51:39,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 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) [2021-11-23 13:51:39,304 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 517 transitions. [2021-11-23 13:51:39,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 13:51:39,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:51:39,304 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:51:39,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 13:51:39,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:39,505 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:51:39,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:51:39,505 INFO L85 PathProgramCache]: Analyzing trace with hash -2083238657, now seen corresponding path program 1 times [2021-11-23 13:51:39,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:51:39,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836178542] [2021-11-23 13:51:39,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:51:39,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:51:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:39,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:51:39,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836178542] [2021-11-23 13:51:39,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836178542] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:51:39,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260046104] [2021-11-23 13:51:39,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:51:39,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:39,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:51:39,778 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:51:39,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 13:51:39,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:39,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 13:51:39,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:51:39,868 INFO L388 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 21 treesize of output 17 [2021-11-23 13:51:39,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:39,896 INFO L388 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 30 treesize of output 29 [2021-11-23 13:51:39,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:39,947 INFO L388 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 30 treesize of output 29 [2021-11-23 13:51:39,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:39,978 INFO L388 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 30 treesize of output 29 [2021-11-23 13:51:40,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:40,031 INFO L388 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 27 treesize of output 26 [2021-11-23 13:51:40,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:40,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:40,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:40,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:51:40,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-11-23 13:51:40,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:40,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:40,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:40,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:40,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:40,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:40,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:51:40,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 53 [2021-11-23 13:51:40,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:40,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:40,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:40,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:40,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:40,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:51:40,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:51:40,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 53 [2021-11-23 13:51:40,269 INFO L354 Elim1Store]: treesize reduction 162, result has 17.3 percent of original size [2021-11-23 13:51:40,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 56 [2021-11-23 13:51:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:51:58,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:52:00,728 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_113| Int)) (or (forall ((|ULTIMATE.start_main_~FIXEDVAL~0#1| Int)) (not (= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (let ((.cse0 (* |v_ULTIMATE.start_main_~i~0#1_113| 20))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (- 20) |c_ULTIMATE.start_main_~a~0#1.offset| .cse0) |ULTIMATE.start_main_~FIXEDVAL~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse0 (- 16)) |ULTIMATE.start_main_~FIXEDVAL~0#1|)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (< |v_ULTIMATE.start_main_~i~0#1_113| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-11-23 13:52:02,191 INFO L388 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 47 treesize of output 45 [2021-11-23 13:52:02,195 INFO L388 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 1709 treesize of output 1693 [2021-11-23 13:52:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-23 13:52:02,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260046104] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:52:02,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:52:02,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 26 [2021-11-23 13:52:02,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033726302] [2021-11-23 13:52:02,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:52:02,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 13:52:02,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:52:02,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 13:52:02,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=460, Unknown=11, NotChecked=46, Total=650 [2021-11-23 13:52:02,750 INFO L87 Difference]: Start difference. First operand 394 states and 517 transitions. Second operand has 26 states, 26 states have (on average 4.423076923076923) internal successors, (115), 26 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:52:08,866 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)))) (= |c_ULTIMATE.start_main_~i~0#1| 1) (not (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 20) (- 16))) |c_ULTIMATE.start_main_~DEFAULTVAL~0#1|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_113| Int)) (or (forall ((|ULTIMATE.start_main_~FIXEDVAL~0#1| Int)) (not (= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (let ((.cse1 (* |v_ULTIMATE.start_main_~i~0#1_113| 20))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (- 20) |c_ULTIMATE.start_main_~a~0#1.offset| .cse1) |ULTIMATE.start_main_~FIXEDVAL~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1 (- 16)) |ULTIMATE.start_main_~FIXEDVAL~0#1|)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (< |v_ULTIMATE.start_main_~i~0#1_113| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))))) is different from false [2021-11-23 13:52:10,876 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |c_ULTIMATE.start_main_~i~0#1| 1) (not (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 20) (- 16))) |c_ULTIMATE.start_main_~DEFAULTVAL~0#1|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_113| Int)) (or (forall ((|ULTIMATE.start_main_~FIXEDVAL~0#1| Int)) (not (= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (let ((.cse0 (* |v_ULTIMATE.start_main_~i~0#1_113| 20))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (- 20) |c_ULTIMATE.start_main_~a~0#1.offset| .cse0) |ULTIMATE.start_main_~FIXEDVAL~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse0 (- 16)) |ULTIMATE.start_main_~FIXEDVAL~0#1|)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (< |v_ULTIMATE.start_main_~i~0#1_113| (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-11-23 13:52:17,220 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 20 |c_ULTIMATE.start_main_~i~0#1|)) 20)) (not (= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (- 20) |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 20)) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) 4))) (forall ((|v_ULTIMATE.start_main_~i~0#1_113| Int)) (or (forall ((|ULTIMATE.start_main_~FIXEDVAL~0#1| Int)) (not (= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (let ((.cse0 (* |v_ULTIMATE.start_main_~i~0#1_113| 20))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (- 20) |c_ULTIMATE.start_main_~a~0#1.offset| .cse0) |ULTIMATE.start_main_~FIXEDVAL~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse0 (- 16)) |ULTIMATE.start_main_~FIXEDVAL~0#1|)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (< |v_ULTIMATE.start_main_~i~0#1_113| (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-11-23 13:52:19,233 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 20 |c_ULTIMATE.start_main_~i~0#1|)) 20)) (exists ((|ULTIMATE.start_main_~i~0#1| Int)) (and (<= 2 |ULTIMATE.start_main_~i~0#1|) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (* |ULTIMATE.start_main_~i~0#1| 20))) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1 (- 16))) (select .cse0 (+ (- 20) |c_ULTIMATE.start_main_~a~0#1.offset| .cse1)))))) (not (= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (store .cse2 (+ (- 20) |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 20)) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) 4))) (not (= (select .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) |c_ULTIMATE.start_main_~DEFAULTVAL~0#1|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_113| Int)) (or (forall ((|ULTIMATE.start_main_~FIXEDVAL~0#1| Int)) (not (= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (let ((.cse3 (* |v_ULTIMATE.start_main_~i~0#1_113| 20))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (- 20) |c_ULTIMATE.start_main_~a~0#1.offset| .cse3) |ULTIMATE.start_main_~FIXEDVAL~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse3 (- 16)) |ULTIMATE.start_main_~FIXEDVAL~0#1|)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (< |v_ULTIMATE.start_main_~i~0#1_113| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))))) is different from false [2021-11-23 13:52:21,253 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 20 |c_ULTIMATE.start_main_~i~0#1|)) 20)) (not (= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (store .cse0 (+ (- 20) |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 20)) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) 4))) (forall ((|v_ULTIMATE.start_main_~i~0#1_113| Int)) (or (forall ((|ULTIMATE.start_main_~FIXEDVAL~0#1| Int)) (not (= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (let ((.cse1 (* |v_ULTIMATE.start_main_~i~0#1_113| 20))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (- 20) |c_ULTIMATE.start_main_~a~0#1.offset| .cse1) |ULTIMATE.start_main_~FIXEDVAL~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1 (- 16)) |ULTIMATE.start_main_~FIXEDVAL~0#1|)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (< |v_ULTIMATE.start_main_~i~0#1_113| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (not (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4))) |c_ULTIMATE.start_main_~DEFAULTVAL~0#1|)))) is different from false [2021-11-23 13:52:23,266 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 20 |c_ULTIMATE.start_main_~i~0#1|)) 20)) (exists ((|ULTIMATE.start_main_~i~0#1| Int)) (and (<= 2 |ULTIMATE.start_main_~i~0#1|) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (* |ULTIMATE.start_main_~i~0#1| 20))) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1 (- 16))) (select .cse0 (+ (- 20) |c_ULTIMATE.start_main_~a~0#1.offset| .cse1)))))) (not (= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (store .cse2 (+ (- 20) |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 20)) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) 4))) (not (= (select .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) |c_ULTIMATE.start_main_~DEFAULTVAL~0#1|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_113| Int)) (or (forall ((|ULTIMATE.start_main_~FIXEDVAL~0#1| Int)) (not (= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (let ((.cse3 (* |v_ULTIMATE.start_main_~i~0#1_113| 20))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (- 20) |c_ULTIMATE.start_main_~a~0#1.offset| .cse3) |ULTIMATE.start_main_~FIXEDVAL~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse3 (- 16)) |ULTIMATE.start_main_~FIXEDVAL~0#1|)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (< |v_ULTIMATE.start_main_~i~0#1_113| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (not (= (select .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4))) |c_ULTIMATE.start_main_~DEFAULTVAL~0#1|)))) is different from false [2021-11-23 13:52:25,277 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) |c_ULTIMATE.start_main_~DEFAULTVAL~0#1|)) (<= 2 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_113| Int)) (or (forall ((|ULTIMATE.start_main_~FIXEDVAL~0#1| Int)) (not (= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (let ((.cse1 (* |v_ULTIMATE.start_main_~i~0#1_113| 20))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (- 20) |c_ULTIMATE.start_main_~a~0#1.offset| .cse1) |ULTIMATE.start_main_~FIXEDVAL~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1 (- 16)) |ULTIMATE.start_main_~FIXEDVAL~0#1|)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (< |v_ULTIMATE.start_main_~i~0#1_113| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (not (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4))) |c_ULTIMATE.start_main_~DEFAULTVAL~0#1|)))) is different from false [2021-11-23 13:53:07,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:07,084 INFO L93 Difference]: Finished difference Result 1016 states and 1325 transitions. [2021-11-23 13:53:07,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-23 13:53:07,085 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.423076923076923) internal successors, (115), 26 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-23 13:53:07,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:07,091 INFO L225 Difference]: With dead ends: 1016 [2021-11-23 13:53:07,091 INFO L226 Difference]: Without dead ends: 1014 [2021-11-23 13:53:07,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 86 SyntacticMatches, 14 SemanticMatches, 45 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 85.4s TimeCoverageRelationStatistics Valid=329, Invalid=1147, Unknown=38, NotChecked=648, Total=2162 [2021-11-23 13:53:07,093 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 351 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 602 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:07,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 497 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 520 Invalid, 0 Unknown, 602 Unchecked, 0.5s Time] [2021-11-23 13:53:07,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2021-11-23 13:53:07,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 525. [2021-11-23 13:53:07,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 1.3263358778625953) internal successors, (695), 524 states have internal predecessors, (695), 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) [2021-11-23 13:53:07,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 695 transitions. [2021-11-23 13:53:07,230 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 695 transitions. Word has length 47 [2021-11-23 13:53:07,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:53:07,231 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 695 transitions. [2021-11-23 13:53:07,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.423076923076923) internal successors, (115), 26 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:53:07,231 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 695 transitions. [2021-11-23 13:53:07,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 13:53:07,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:07,233 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:53:07,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 13:53:07,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 13:53:07,447 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:07,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:07,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1659956993, now seen corresponding path program 2 times [2021-11-23 13:53:07,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:07,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142812715] [2021-11-23 13:53:07,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:07,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:53:07,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:07,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142812715] [2021-11-23 13:53:07,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142812715] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:53:07,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765258607] [2021-11-23 13:53:07,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:53:07,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:53:07,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:53:07,879 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:53:07,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 13:53:07,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:53:07,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:53:07,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 13:53:07,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:53:08,045 INFO L388 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 16 treesize of output 12 [2021-11-23 13:53:08,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:08,103 INFO L388 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 29 treesize of output 28 [2021-11-23 13:53:08,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:08,147 INFO L388 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 29 treesize of output 28 [2021-11-23 13:53:08,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:08,187 INFO L388 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 29 treesize of output 28 [2021-11-23 13:53:08,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:08,256 INFO L388 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 32 treesize of output 25 [2021-11-23 13:53:08,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:08,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:08,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:08,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:53:08,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2021-11-23 13:53:08,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:08,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:08,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:08,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:53:08,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2021-11-23 13:53:08,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:08,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:08,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:08,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:53:08,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2021-11-23 13:53:08,544 INFO L354 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2021-11-23 13:53:08,544 INFO L388 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 3 case distinctions, treesize of input 47 treesize of output 43 [2021-11-23 13:53:09,020 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 13:53:09,021 INFO L388 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 55 treesize of output 35 [2021-11-23 13:53:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:53:09,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:53:11,346 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_121| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_121| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|ULTIMATE.start_main_~value~0#1| Int)) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_121| 20) (- 16)) |ULTIMATE.start_main_~value~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))))) is different from false [2021-11-23 13:53:11,670 INFO L388 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 39 treesize of output 37 [2021-11-23 13:53:11,675 INFO L388 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 861 treesize of output 845 [2021-11-23 13:53:12,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-23 13:53:12,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765258607] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:53:12,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:53:12,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 31 [2021-11-23 13:53:12,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456221037] [2021-11-23 13:53:12,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:53:12,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 13:53:12,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:53:12,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 13:53:12,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=747, Unknown=1, NotChecked=56, Total=930 [2021-11-23 13:53:12,041 INFO L87 Difference]: Start difference. First operand 525 states and 695 transitions. Second operand has 31 states, 31 states have (on average 4.32258064516129) internal successors, (134), 31 states have internal predecessors, (134), 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) [2021-11-23 13:53:17,764 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (* |c_ULTIMATE.start_main_~i~0#1| 20))) (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse4 (- 16)))) (let ((.cse0 (select .cse1 .cse3)) (.cse2 (+ (- 20) |c_ULTIMATE.start_main_~a~0#1.offset| .cse4))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_121| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_121| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|ULTIMATE.start_main_~value~0#1| Int)) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_121| 20) (- 16)) |ULTIMATE.start_main_~value~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))))) (<= 10 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |c_ULTIMATE.start_main_~i~0#1| 1) (= .cse0 (select .cse1 .cse2)) (= .cse0 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (= (select (store .cse1 .cse3 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) .cse2) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (<= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| 0))))) is different from false [2021-11-23 13:53:19,776 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (* |c_ULTIMATE.start_main_~i~0#1| 20))) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse4 (- 16)))) (let ((.cse1 (select .cse0 .cse3)) (.cse2 (+ (- 20) |c_ULTIMATE.start_main_~a~0#1.offset| .cse4))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_121| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_121| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|ULTIMATE.start_main_~value~0#1| Int)) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_121| 20) (- 16)) |ULTIMATE.start_main_~value~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))))) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4))) (<= 10 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |c_ULTIMATE.start_main_~i~0#1| 1) (= .cse1 (select .cse0 .cse2)) (= .cse1 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (= (select (store .cse0 .cse3 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) .cse2) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (<= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| 0))))) is different from false [2021-11-23 13:53:21,792 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_121| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_121| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|ULTIMATE.start_main_~value~0#1| Int)) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_121| 20) (- 16)) |ULTIMATE.start_main_~value~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))))) (<= 10 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |c_ULTIMATE.start_main_~i~0#1| 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 20) (- 16))) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (<= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| 0)) is different from false [2021-11-23 13:53:23,808 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_121| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_121| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|ULTIMATE.start_main_~value~0#1| Int)) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_121| 20) (- 16)) |ULTIMATE.start_main_~value~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))))) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4))) (<= 10 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |c_ULTIMATE.start_main_~i~0#1| 1) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 20) (- 16))) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (<= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| 0))) is different from false [2021-11-23 13:53:26,205 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (<= 10 (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 20 |c_ULTIMATE.start_main_~i~0#1|)) 20)) (forall ((|v_ULTIMATE.start_main_~i~0#1_121| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_121| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|ULTIMATE.start_main_~value~0#1| Int)) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_121| 20) (- 16)) |ULTIMATE.start_main_~value~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))))) (let ((.cse1 (store .cse0 (+ (- 20) |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 20)) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|))) (= (select .cse1 0) (select .cse1 4))) (<= 10 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (exists ((|ULTIMATE.start_main_~i~0#1| Int)) (and (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (= (select .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (select .cse2 (+ (- 20) |c_ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 20))))) (<= 2 |ULTIMATE.start_main_~i~0#1|))) (<= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| 0))) is different from false [2021-11-23 13:53:28,229 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse0 (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (and (<= 10 .cse0) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_121| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_121| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|ULTIMATE.start_main_~value~0#1| Int)) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_121| 20) (- 16)) |ULTIMATE.start_main_~value~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))))) (<= 10 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (= .cse0 (select .cse1 (+ (- 20) |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 20)))) (<= 2 |c_ULTIMATE.start_main_~i~0#1|) (<= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| 0)))) is different from false [2021-11-23 13:53:31,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:31,429 INFO L93 Difference]: Finished difference Result 1068 states and 1384 transitions. [2021-11-23 13:53:31,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-23 13:53:31,430 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.32258064516129) internal successors, (134), 31 states have internal predecessors, (134), 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 47 [2021-11-23 13:53:31,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:31,434 INFO L225 Difference]: With dead ends: 1068 [2021-11-23 13:53:31,434 INFO L226 Difference]: Without dead ends: 1066 [2021-11-23 13:53:31,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 90 SyntacticMatches, 18 SemanticMatches, 75 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=629, Invalid=4216, Unknown=13, NotChecked=994, Total=5852 [2021-11-23 13:53:31,436 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 350 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 491 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:31,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 798 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 844 Invalid, 0 Unknown, 491 Unchecked, 0.6s Time] [2021-11-23 13:53:31,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-11-23 13:53:31,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 692. [2021-11-23 13:53:31,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 1.3328509406657019) internal successors, (921), 691 states have internal predecessors, (921), 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) [2021-11-23 13:53:31,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 921 transitions. [2021-11-23 13:53:31,584 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 921 transitions. Word has length 47 [2021-11-23 13:53:31,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:53:31,585 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 921 transitions. [2021-11-23 13:53:31,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.32258064516129) internal successors, (134), 31 states have internal predecessors, (134), 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) [2021-11-23 13:53:31,585 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 921 transitions. [2021-11-23 13:53:31,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 13:53:31,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:31,587 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:53:31,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 13:53:31,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 13:53:31,814 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:31,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:31,814 INFO L85 PathProgramCache]: Analyzing trace with hash 886474751, now seen corresponding path program 1 times [2021-11-23 13:53:31,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:31,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501373618] [2021-11-23 13:53:31,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:31,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:53:32,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:32,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501373618] [2021-11-23 13:53:32,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501373618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:53:32,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664942861] [2021-11-23 13:53:32,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:32,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:53:32,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:53:32,234 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:53:32,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 13:53:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:32,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 13:53:32,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:53:32,391 INFO L388 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 16 treesize of output 12 [2021-11-23 13:53:32,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:32,444 INFO L388 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 29 treesize of output 28 [2021-11-23 13:53:32,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:32,489 INFO L388 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 29 treesize of output 28 [2021-11-23 13:53:32,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:32,551 INFO L388 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 29 treesize of output 28 [2021-11-23 13:53:32,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:32,612 INFO L388 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 [2021-11-23 13:53:32,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:32,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:32,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:32,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:53:32,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-11-23 13:53:32,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:32,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:32,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:32,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:53:32,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-11-23 13:53:32,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:32,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:32,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:32,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:53:32,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-11-23 13:53:32,910 INFO L354 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2021-11-23 13:53:32,910 INFO L388 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 3 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 13:53:34,028 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-23 13:53:34,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 38 [2021-11-23 13:53:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:53:34,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:53:36,421 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_130| Int)) (or (forall ((|ULTIMATE.start_main_~value~0#1| Int)) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_130| 20) (- 16)) |ULTIMATE.start_main_~value~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (< |v_ULTIMATE.start_main_~i~0#1_130| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-11-23 13:53:41,552 INFO L388 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 39 treesize of output 37 [2021-11-23 13:53:41,554 INFO L388 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 421 treesize of output 413 [2021-11-23 13:53:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-23 13:53:41,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664942861] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:53:41,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:53:41,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2021-11-23 13:53:41,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698327422] [2021-11-23 13:53:41,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:53:41,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 13:53:41,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:53:41,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 13:53:41,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=634, Unknown=10, NotChecked=52, Total=812 [2021-11-23 13:53:41,743 INFO L87 Difference]: Start difference. First operand 692 states and 921 transitions. Second operand has 29 states, 29 states have (on average 4.620689655172414) internal successors, (134), 29 states have internal predecessors, (134), 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) [2021-11-23 13:53:44,198 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 20) (- 16)))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (select (store .cse0 .cse1 |c_ULTIMATE.start_main_~value~0#1|) 4) |c_ULTIMATE.start_main_~DEFAULTVAL~0#1|)) (= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 10 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |c_ULTIMATE.start_main_~i~0#1| 1) (not (= 0 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|)) (= (select .cse0 .cse1) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_130| Int)) (or (forall ((|ULTIMATE.start_main_~value~0#1| Int)) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_130| 20) (- 16)) |ULTIMATE.start_main_~value~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (< |v_ULTIMATE.start_main_~i~0#1_130| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| 0))) is different from false [2021-11-23 13:53:46,209 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 20) (- 16)))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (select (store .cse0 .cse1 |c_ULTIMATE.start_main_~value~0#1|) 4) |c_ULTIMATE.start_main_~DEFAULTVAL~0#1|)) (= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4))) (<= 10 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |c_ULTIMATE.start_main_~i~0#1| 1) (not (= 0 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|)) (= (select .cse0 .cse1) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_130| Int)) (or (forall ((|ULTIMATE.start_main_~value~0#1| Int)) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_130| 20) (- 16)) |ULTIMATE.start_main_~value~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (< |v_ULTIMATE.start_main_~i~0#1_130| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| 0))) is different from false [2021-11-23 13:53:51,345 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (= (select .cse0 (+ (- 20) |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 20))) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (<= 10 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (<= 2 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_130| Int)) (or (forall ((|ULTIMATE.start_main_~value~0#1| Int)) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_130| 20) (- 16)) |ULTIMATE.start_main_~value~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (< |v_ULTIMATE.start_main_~i~0#1_130| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| 0))) is different from false [2021-11-23 13:53:57,201 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (<= 10 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (<= 2 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_130| Int)) (or (forall ((|ULTIMATE.start_main_~value~0#1| Int)) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_130| 20) (- 16)) |ULTIMATE.start_main_~value~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (< |v_ULTIMATE.start_main_~i~0#1_130| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| 0)) is different from false [2021-11-23 13:53:59,213 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (= (select .cse0 (+ (- 20) |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 20))) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (<= 10 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (not (= 0 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|)) (<= 2 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_130| Int)) (or (forall ((|ULTIMATE.start_main_~value~0#1| Int)) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_130| 20) (- 16)) |ULTIMATE.start_main_~value~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (< |v_ULTIMATE.start_main_~i~0#1_130| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| 0))) is different from false [2021-11-23 13:54:04,632 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (<= 10 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (not (= 0 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|)) (<= 2 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_130| Int)) (or (forall ((|ULTIMATE.start_main_~value~0#1| Int)) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_130| 20) (- 16)) |ULTIMATE.start_main_~value~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (< |v_ULTIMATE.start_main_~i~0#1_130| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| 0)) is different from false [2021-11-23 13:54:06,642 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse1 (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4))))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (= (select .cse0 (+ (- 20) |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 20))) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (<= 10 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| .cse1) (not (= 0 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|)) (<= 2 |c_ULTIMATE.start_main_~i~0#1|) (not (= .cse1 |c_ULTIMATE.start_main_~DEFAULTVAL~0#1|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_130| Int)) (or (forall ((|ULTIMATE.start_main_~value~0#1| Int)) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_130| 20) (- 16)) |ULTIMATE.start_main_~value~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (< |v_ULTIMATE.start_main_~i~0#1_130| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| 0)))) is different from false [2021-11-23 13:54:10,382 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse1 (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4))))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (<= 10 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| .cse1) (not (= 0 |c_ULTIMATE.start_main_~FIXEDVAL~0#1|)) (<= 2 |c_ULTIMATE.start_main_~i~0#1|) (not (= .cse1 |c_ULTIMATE.start_main_~DEFAULTVAL~0#1|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_130| Int)) (or (forall ((|ULTIMATE.start_main_~value~0#1| Int)) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_130| 20) (- 16)) |ULTIMATE.start_main_~value~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (< |v_ULTIMATE.start_main_~i~0#1_130| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| 0)))) is different from false [2021-11-23 13:54:13,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:54:13,053 INFO L93 Difference]: Finished difference Result 1957 states and 2503 transitions. [2021-11-23 13:54:13,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-23 13:54:13,054 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.620689655172414) internal successors, (134), 29 states have internal predecessors, (134), 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 47 [2021-11-23 13:54:13,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:54:13,060 INFO L225 Difference]: With dead ends: 1957 [2021-11-23 13:54:13,060 INFO L226 Difference]: Without dead ends: 1955 [2021-11-23 13:54:13,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 79 SyntacticMatches, 18 SemanticMatches, 92 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 2400 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=1136, Invalid=6013, Unknown=27, NotChecked=1566, Total=8742 [2021-11-23 13:54:13,063 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 428 mSDsluCounter, 1152 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 2405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 821 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 13:54:13,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 1252 Invalid, 2405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1276 Invalid, 0 Unknown, 821 Unchecked, 0.9s Time] [2021-11-23 13:54:13,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2021-11-23 13:54:13,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 624. [2021-11-23 13:54:13,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 1.333868378812199) internal successors, (831), 623 states have internal predecessors, (831), 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) [2021-11-23 13:54:13,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 831 transitions. [2021-11-23 13:54:13,199 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 831 transitions. Word has length 47 [2021-11-23 13:54:13,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:54:13,199 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 831 transitions. [2021-11-23 13:54:13,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.620689655172414) internal successors, (134), 29 states have internal predecessors, (134), 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) [2021-11-23 13:54:13,200 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 831 transitions. [2021-11-23 13:54:13,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 13:54:13,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:54:13,201 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:54:13,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 13:54:13,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 13:54:13,418 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:54:13,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:54:13,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1012456423, now seen corresponding path program 5 times [2021-11-23 13:54:13,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:54:13,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431053425] [2021-11-23 13:54:13,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:54:13,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:54:13,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:54:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:54:13,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:54:13,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431053425] [2021-11-23 13:54:13,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431053425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:54:13,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859792626] [2021-11-23 13:54:13,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:54:13,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:54:13,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:54:13,666 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:54:13,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 13:54:13,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-23 13:54:13,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:54:13,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 13:54:13,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:54:13,861 INFO L388 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 16 treesize of output 12 [2021-11-23 13:54:13,913 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-23 13:54:13,913 INFO L388 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 29 treesize of output 28 [2021-11-23 13:54:13,942 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-23 13:54:13,942 INFO L388 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 29 treesize of output 28 [2021-11-23 13:54:13,967 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-23 13:54:13,967 INFO L388 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 29 treesize of output 28 [2021-11-23 13:54:13,991 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-23 13:54:13,991 INFO L388 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 29 treesize of output 28 [2021-11-23 13:54:14,030 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-23 13:54:14,031 INFO L388 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 25 [2021-11-23 13:54:14,086 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-11-23 13:54:14,086 INFO L388 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 3 case distinctions, treesize of input 38 treesize of output 40 [2021-11-23 13:54:14,118 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-11-23 13:54:14,118 INFO L388 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 3 case distinctions, treesize of input 38 treesize of output 40 [2021-11-23 13:54:14,147 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-11-23 13:54:14,147 INFO L388 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 3 case distinctions, treesize of input 38 treesize of output 40 [2021-11-23 13:54:14,175 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-23 13:54:14,176 INFO L388 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 3 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 13:54:14,517 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 13:54:14,517 INFO L388 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 53 treesize of output 27 [2021-11-23 13:54:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:54:14,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:54:15,070 INFO L388 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 43 treesize of output 39 [2021-11-23 13:54:15,074 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 13:54:15,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 255 [2021-11-23 13:54:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:54:15,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859792626] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:54:15,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:54:15,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 33 [2021-11-23 13:54:15,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534580948] [2021-11-23 13:54:15,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:54:15,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 13:54:15,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:54:15,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 13:54:15,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 13:54:15,147 INFO L87 Difference]: Start difference. First operand 624 states and 831 transitions. Second operand has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 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) [2021-11-23 13:54:19,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:54:19,800 INFO L93 Difference]: Finished difference Result 2771 states and 3688 transitions. [2021-11-23 13:54:19,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-23 13:54:19,800 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 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 63 [2021-11-23 13:54:19,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:54:19,810 INFO L225 Difference]: With dead ends: 2771 [2021-11-23 13:54:19,810 INFO L226 Difference]: Without dead ends: 2769 [2021-11-23 13:54:19,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 101 SyntacticMatches, 14 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5836 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1836, Invalid=14676, Unknown=0, NotChecked=0, Total=16512 [2021-11-23 13:54:19,812 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 1241 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 1267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 2664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1267 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:54:19,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1241 Valid, 1029 Invalid, 2664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1267 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-23 13:54:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-11-23 13:54:19,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 628. [2021-11-23 13:54:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 1.331738437001595) internal successors, (835), 627 states have internal predecessors, (835), 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) [2021-11-23 13:54:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 835 transitions. [2021-11-23 13:54:19,963 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 835 transitions. Word has length 63 [2021-11-23 13:54:19,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:54:19,963 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 835 transitions. [2021-11-23 13:54:19,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 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) [2021-11-23 13:54:19,964 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 835 transitions. [2021-11-23 13:54:19,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 13:54:19,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:54:19,966 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:54:20,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 13:54:20,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 13:54:20,182 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:54:20,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:54:20,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1187303943, now seen corresponding path program 3 times [2021-11-23 13:54:20,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:54:20,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208560215] [2021-11-23 13:54:20,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:54:20,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:54:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:54:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:54:20,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:54:20,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208560215] [2021-11-23 13:54:20,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208560215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:54:20,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681716405] [2021-11-23 13:54:20,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:54:20,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:54:20,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:54:20,874 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:54:20,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 13:54:21,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 13:54:21,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:54:21,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 13:54:21,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:54:21,209 INFO L388 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 16 treesize of output 12 [2021-11-23 13:54:21,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:54:21,277 INFO L388 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 29 treesize of output 28 [2021-11-23 13:54:21,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:54:21,326 INFO L388 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 29 treesize of output 28 [2021-11-23 13:54:21,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:54:21,377 INFO L388 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 29 treesize of output 28 [2021-11-23 13:54:21,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:54:21,489 INFO L388 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 [2021-11-23 13:54:21,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:54:21,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:54:21,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:54:21,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:54:21,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-11-23 13:54:21,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:54:21,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:54:21,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:54:21,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:54:21,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-11-23 13:54:21,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:54:21,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:54:21,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:54:21,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:54:21,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-11-23 13:54:21,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:54:21,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:54:21,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:54:21,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:54:21,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-11-23 13:54:21,955 INFO L354 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2021-11-23 13:54:21,955 INFO L388 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 3 case distinctions, treesize of input 46 treesize of output 48 [2021-11-23 13:54:22,121 INFO L354 Elim1Store]: treesize reduction 162, result has 17.3 percent of original size [2021-11-23 13:54:22,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 63 [2021-11-23 13:54:22,294 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-23 13:54:22,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 78 [2021-11-23 13:54:22,454 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-23 13:54:22,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 78 [2021-11-23 13:54:22,579 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-23 13:54:22,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 78 [2021-11-23 13:54:32,335 INFO L354 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2021-11-23 13:54:32,335 INFO L388 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 90 treesize of output 46 [2021-11-23 13:54:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:54:32,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:54:34,050 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_155| Int)) (or (let ((.cse0 (div c_~SIZE~0 5))) (let ((.cse1 (<= (+ |v_ULTIMATE.start_main_~i~0#1_155| 1) .cse0))) (and (<= |v_ULTIMATE.start_main_~i~0#1_155| .cse0) (or (< c_~SIZE~0 0) .cse1) (or (not (= (mod c_~SIZE~0 5) 0)) .cse1)))) (< |v_ULTIMATE.start_main_~i~0#1_155| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 16) (* |v_ULTIMATE.start_main_~i~0#1_155| 20)) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) is different from false [2021-11-23 13:55:08,484 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_156| Int)) (or (forall ((|ULTIMATE.start_main_~value~0#1| Int) (|v_ULTIMATE.start_main_~i~0#1_155| Int) (|v_ULTIMATE.start_main_~value~0#1_135| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_155| (+ |v_ULTIMATE.start_main_~i~0#1_156| 1)) (let ((.cse0 (div c_~SIZE~0 5))) (let ((.cse1 (<= (+ |v_ULTIMATE.start_main_~i~0#1_155| 1) .cse0))) (and (<= |v_ULTIMATE.start_main_~i~0#1_155| .cse0) (or (< c_~SIZE~0 0) .cse1) (or (not (= (mod c_~SIZE~0 5) 0)) .cse1)))) (< |c_ULTIMATE.start_main_~DEFAULTVAL~0#1| (select (store (let ((.cse2 (* |v_ULTIMATE.start_main_~i~0#1_156| 20))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 16) .cse2) |ULTIMATE.start_main_~value~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse2 (- 4)) |v_ULTIMATE.start_main_~value~0#1_135|)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 16) (* |v_ULTIMATE.start_main_~i~0#1_155| 20)) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (< |v_ULTIMATE.start_main_~i~0#1_156| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-11-23 13:55:47,972 INFO L388 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 91 treesize of output 89 [2021-11-23 13:55:47,979 INFO L388 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 27793 treesize of output 27665 [2021-11-23 13:55:52,507 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-23 13:55:52,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:55:52,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-23 13:55:52,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615743600] [2021-11-23 13:55:52,508 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 13:55:52,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 13:55:52,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:55:52,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 13:55:52,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1007, Unknown=47, NotChecked=138, Total=1406 [2021-11-23 13:55:52,509 INFO L87 Difference]: Start difference. First operand 628 states and 835 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 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) [2021-11-23 13:56:00,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:00,347 INFO L93 Difference]: Finished difference Result 630 states and 836 transitions. [2021-11-23 13:56:00,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 13:56:00,348 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 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 63 [2021-11-23 13:56:00,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:00,350 INFO L225 Difference]: With dead ends: 630 [2021-11-23 13:56:00,351 INFO L226 Difference]: Without dead ends: 628 [2021-11-23 13:56:00,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 84 SyntacticMatches, 26 SemanticMatches, 42 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 87.9s TimeCoverageRelationStatistics Valid=264, Invalid=1414, Unknown=52, NotChecked=162, Total=1892 [2021-11-23 13:56:00,352 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 126 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:00,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 126 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:56:00,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-11-23 13:56:00,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 174. [2021-11-23 13:56:00,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.2658959537572254) internal successors, (219), 173 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:00,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 219 transitions. [2021-11-23 13:56:00,417 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 219 transitions. Word has length 63 [2021-11-23 13:56:00,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:00,417 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 219 transitions. [2021-11-23 13:56:00,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 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) [2021-11-23 13:56:00,417 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 219 transitions. [2021-11-23 13:56:00,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 13:56:00,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:00,418 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:00,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 13:56:00,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 13:56:00,622 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:00,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:00,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1647306353, now seen corresponding path program 6 times [2021-11-23 13:56:00,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:00,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726523516] [2021-11-23 13:56:00,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:00,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:00,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:00,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726523516] [2021-11-23 13:56:00,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726523516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:56:00,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953974752] [2021-11-23 13:56:00,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:56:00,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:56:00,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:56:00,880 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:56:00,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 13:56:01,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-23 13:56:01,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:56:01,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 13:56:01,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:56:01,326 INFO L388 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 21 treesize of output 17 [2021-11-23 13:56:01,356 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-23 13:56:01,357 INFO L388 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 30 treesize of output 29 [2021-11-23 13:56:01,395 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-23 13:56:01,395 INFO L388 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 30 treesize of output 29 [2021-11-23 13:56:01,429 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-23 13:56:01,429 INFO L388 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 36 treesize of output 35 [2021-11-23 13:56:01,734 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-11-23 13:56:01,734 INFO L388 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 55 treesize of output 33 [2021-11-23 13:56:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:01,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:56:01,937 INFO L388 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 17 treesize of output 15 [2021-11-23 13:56:01,940 INFO L388 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 30 treesize of output 26 [2021-11-23 13:56:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:02,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953974752] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:56:02,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:56:02,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2021-11-23 13:56:02,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383527106] [2021-11-23 13:56:02,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:56:02,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 13:56:02,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:02,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 13:56:02,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-11-23 13:56:02,029 INFO L87 Difference]: Start difference. First operand 174 states and 219 transitions. Second operand has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 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) [2021-11-23 13:56:15,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:15,550 INFO L93 Difference]: Finished difference Result 4573 states and 6047 transitions. [2021-11-23 13:56:15,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 320 states. [2021-11-23 13:56:15,550 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 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) Word has length 67 [2021-11-23 13:56:15,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:15,569 INFO L225 Difference]: With dead ends: 4573 [2021-11-23 13:56:15,569 INFO L226 Difference]: Without dead ends: 4571 [2021-11-23 13:56:15,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 121 SyntacticMatches, 12 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47550 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=6241, Invalid=97121, Unknown=0, NotChecked=0, Total=103362 [2021-11-23 13:56:15,578 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 2590 mSDsluCounter, 1739 mSDsCounter, 0 mSdLazyCounter, 2617 mSolverCounterSat, 3050 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2590 SdHoareTripleChecker+Valid, 1869 SdHoareTripleChecker+Invalid, 5667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3050 IncrementalHoareTripleChecker+Valid, 2617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:15,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2590 Valid, 1869 Invalid, 5667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3050 Valid, 2617 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-23 13:56:15,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4571 states. [2021-11-23 13:56:15,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4571 to 396. [2021-11-23 13:56:15,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 1.3113924050632912) internal successors, (518), 395 states have internal predecessors, (518), 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) [2021-11-23 13:56:15,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 518 transitions. [2021-11-23 13:56:15,876 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 518 transitions. Word has length 67 [2021-11-23 13:56:15,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:15,877 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 518 transitions. [2021-11-23 13:56:15,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 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) [2021-11-23 13:56:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 518 transitions. [2021-11-23 13:56:15,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 13:56:15,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:15,883 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:15,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 13:56:16,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 13:56:16,098 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:16,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:16,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1275853645, now seen corresponding path program 4 times [2021-11-23 13:56:16,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:16,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013932968] [2021-11-23 13:56:16,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:16,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:16,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:16,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013932968] [2021-11-23 13:56:16,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013932968] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:56:16,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435222214] [2021-11-23 13:56:16,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:56:16,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:56:16,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:56:16,481 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:56:16,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 13:56:16,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:56:16,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:56:16,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 13:56:16,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:56:16,822 INFO L388 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 20 treesize of output 16 [2021-11-23 13:56:16,887 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-23 13:56:16,888 INFO L388 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 29 treesize of output 28 [2021-11-23 13:56:16,923 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-23 13:56:16,923 INFO L388 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 29 treesize of output 28 [2021-11-23 13:56:16,957 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-23 13:56:16,958 INFO L388 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 23 treesize of output 22 [2021-11-23 13:56:17,390 INFO L388 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 41 treesize of output 29 [2021-11-23 13:56:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:17,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:56:18,011 INFO L388 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 17 treesize of output 15 [2021-11-23 13:56:18,013 INFO L388 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 30 [2021-11-23 13:56:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:18,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435222214] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:56:18,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:56:18,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 40 [2021-11-23 13:56:18,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162262936] [2021-11-23 13:56:18,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:56:18,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-23 13:56:18,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:18,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-23 13:56:18,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1433, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 13:56:18,225 INFO L87 Difference]: Start difference. First operand 396 states and 518 transitions. Second operand has 40 states, 40 states have (on average 4.85) internal successors, (194), 40 states have internal predecessors, (194), 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) [2021-11-23 13:56:58,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:58,492 INFO L93 Difference]: Finished difference Result 6269 states and 8322 transitions. [2021-11-23 13:56:58,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 377 states. [2021-11-23 13:56:58,493 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.85) internal successors, (194), 40 states have internal predecessors, (194), 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 67 [2021-11-23 13:56:58,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:58,518 INFO L225 Difference]: With dead ends: 6269 [2021-11-23 13:56:58,518 INFO L226 Difference]: Without dead ends: 6267 [2021-11-23 13:56:58,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 109 SyntacticMatches, 8 SemanticMatches, 411 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75484 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=13563, Invalid=156593, Unknown=0, NotChecked=0, Total=170156 [2021-11-23 13:56:58,529 INFO L933 BasicCegarLoop]: 721 mSDtfsCounter, 852 mSDsluCounter, 14244 mSDsCounter, 0 mSdLazyCounter, 21863 mSolverCounterSat, 844 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 14965 SdHoareTripleChecker+Invalid, 22707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 844 IncrementalHoareTripleChecker+Valid, 21863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:58,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [852 Valid, 14965 Invalid, 22707 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [844 Valid, 21863 Invalid, 0 Unknown, 0 Unchecked, 20.7s Time] [2021-11-23 13:56:58,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6267 states. [2021-11-23 13:56:58,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6267 to 554. [2021-11-23 13:56:58,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 1.3309222423146474) internal successors, (736), 553 states have internal predecessors, (736), 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) [2021-11-23 13:56:58,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 736 transitions. [2021-11-23 13:56:58,826 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 736 transitions. Word has length 67 [2021-11-23 13:56:58,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:58,827 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 736 transitions. [2021-11-23 13:56:58,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.85) internal successors, (194), 40 states have internal predecessors, (194), 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) [2021-11-23 13:56:58,827 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 736 transitions. [2021-11-23 13:56:58,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 13:56:58,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:58,828 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:58,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 13:56:59,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:56:59,029 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:59,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:59,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1493867515, now seen corresponding path program 7 times [2021-11-23 13:56:59,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:59,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259688391] [2021-11-23 13:56:59,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:59,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:59,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:59,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259688391] [2021-11-23 13:56:59,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259688391] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:56:59,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362133286] [2021-11-23 13:56:59,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:56:59,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:56:59,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:56:59,341 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:56:59,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 13:56:59,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:59,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 13:56:59,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:56:59,532 INFO L388 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 21 treesize of output 17 [2021-11-23 13:56:59,575 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-23 13:56:59,575 INFO L388 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 30 treesize of output 29 [2021-11-23 13:56:59,623 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-23 13:56:59,623 INFO L388 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 36 treesize of output 35 [2021-11-23 13:56:59,977 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-11-23 13:56:59,977 INFO L388 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 55 treesize of output 33 [2021-11-23 13:57:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:57:00,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:57:00,176 INFO L388 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 17 treesize of output 15 [2021-11-23 13:57:00,183 INFO L388 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 30 treesize of output 26 [2021-11-23 13:57:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:57:00,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362133286] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:57:00,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:57:00,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 23 [2021-11-23 13:57:00,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230964155] [2021-11-23 13:57:00,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:57:00,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 13:57:00,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:57:00,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 13:57:00,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-11-23 13:57:00,261 INFO L87 Difference]: Start difference. First operand 554 states and 736 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 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) [2021-11-23 13:57:37,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:57:37,785 INFO L93 Difference]: Finished difference Result 16022 states and 21399 transitions. [2021-11-23 13:57:37,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 750 states. [2021-11-23 13:57:37,786 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 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 71 [2021-11-23 13:57:37,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:57:37,856 INFO L225 Difference]: With dead ends: 16022 [2021-11-23 13:57:37,856 INFO L226 Difference]: Without dead ends: 16020 [2021-11-23 13:57:37,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 128 SyntacticMatches, 10 SemanticMatches, 750 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273108 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=23193, Invalid=541559, Unknown=0, NotChecked=0, Total=564752 [2021-11-23 13:57:37,884 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 4293 mSDsluCounter, 3258 mSDsCounter, 0 mSdLazyCounter, 4940 mSolverCounterSat, 5225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4293 SdHoareTripleChecker+Valid, 3477 SdHoareTripleChecker+Invalid, 10165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5225 IncrementalHoareTripleChecker+Valid, 4940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:57:37,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4293 Valid, 3477 Invalid, 10165 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5225 Valid, 4940 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2021-11-23 13:57:37,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16020 states. [2021-11-23 13:57:38,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16020 to 1179. [2021-11-23 13:57:38,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 1.337011884550085) internal successors, (1575), 1178 states have internal predecessors, (1575), 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) [2021-11-23 13:57:38,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1575 transitions. [2021-11-23 13:57:38,724 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1575 transitions. Word has length 71 [2021-11-23 13:57:38,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:57:38,725 INFO L470 AbstractCegarLoop]: Abstraction has 1179 states and 1575 transitions. [2021-11-23 13:57:38,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 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) [2021-11-23 13:57:38,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1575 transitions. [2021-11-23 13:57:38,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 13:57:38,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:57:38,727 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:57:38,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-23 13:57:38,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:57:38,928 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:57:38,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:57:38,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1070220793, now seen corresponding path program 1 times [2021-11-23 13:57:38,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:57:38,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473141258] [2021-11-23 13:57:38,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:57:38,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:57:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:57:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:57:39,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:57:39,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473141258] [2021-11-23 13:57:39,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473141258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:57:39,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560278569] [2021-11-23 13:57:39,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:57:39,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:57:39,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:57:39,720 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:57:39,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd1c26-8213-414d-a60d-ba074d2321ad/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 13:57:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:57:39,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 13:57:39,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:57:40,033 INFO L388 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 20 treesize of output 16 [2021-11-23 13:57:40,089 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-23 13:57:40,090 INFO L388 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 29 treesize of output 28 [2021-11-23 13:57:40,125 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-23 13:57:40,125 INFO L388 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 23 treesize of output 22 [2021-11-23 13:57:40,615 INFO L388 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 41 treesize of output 29 [2021-11-23 13:57:40,652 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:57:40,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:57:41,147 INFO L388 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 17 treesize of output 15 [2021-11-23 13:57:41,151 INFO L388 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 30 [2021-11-23 13:57:41,368 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:57:41,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560278569] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:57:41,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:57:41,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 44 [2021-11-23 13:57:41,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414365972] [2021-11-23 13:57:41,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:57:41,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-23 13:57:41,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:57:41,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-23 13:57:41,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1753, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 13:57:41,371 INFO L87 Difference]: Start difference. First operand 1179 states and 1575 transitions. Second operand has 44 states, 44 states have (on average 4.681818181818182) internal successors, (206), 44 states have internal predecessors, (206), 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)