./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/rev-3-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/rev-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX --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 fe3cf414f0e241a9a4e73e59647cf6619ea50b905df4a1c2a404b3413992b780 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:50:58,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:50:58,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:50:58,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:50:58,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:50:58,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:50:59,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:50:59,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:50:59,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:50:59,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:50:59,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:50:59,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:50:59,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:50:59,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:50:59,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:50:59,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:50:59,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:50:59,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:50:59,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:50:59,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:50:59,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:50:59,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:50:59,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:50:59,061 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:50:59,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:50:59,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:50:59,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:50:59,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:50:59,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:50:59,074 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:50:59,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:50:59,076 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:50:59,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:50:59,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:50:59,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:50:59,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:50:59,081 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:50:59,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:50:59,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:50:59,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:50:59,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:50:59,085 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:50:59,112 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:50:59,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:50:59,113 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:50:59,114 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:50:59,115 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:50:59,115 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:50:59,116 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:50:59,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:50:59,116 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:50:59,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:50:59,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:50:59,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:50:59,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:50:59,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:50:59,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:50:59,118 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:50:59,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:50:59,119 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:50:59,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:50:59,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:50:59,120 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:50:59,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:50:59,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:50:59,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:50:59,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:50:59,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:50:59,121 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:50:59,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:50:59,122 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:50:59,122 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:50:59,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:50:59,123 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:50:59,123 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_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe3cf414f0e241a9a4e73e59647cf6619ea50b905df4a1c2a404b3413992b780 [2021-11-09 09:50:59,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:50:59,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:50:59,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:50:59,456 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:50:59,457 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:50:59,458 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-multidimensional/rev-3-u.c [2021-11-09 09:50:59,559 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/data/e6124155a/ae4eaa91b82742d58783bb940a3b0ea4/FLAG314536c0e [2021-11-09 09:51:00,229 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:51:00,230 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/sv-benchmarks/c/array-multidimensional/rev-3-u.c [2021-11-09 09:51:00,238 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/data/e6124155a/ae4eaa91b82742d58783bb940a3b0ea4/FLAG314536c0e [2021-11-09 09:51:00,554 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/data/e6124155a/ae4eaa91b82742d58783bb940a3b0ea4 [2021-11-09 09:51:00,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:51:00,560 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:51:00,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:51:00,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:51:00,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:51:00,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:51:00" (1/1) ... [2021-11-09 09:51:00,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ab3bad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:51:00, skipping insertion in model container [2021-11-09 09:51:00,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:51:00" (1/1) ... [2021-11-09 09:51:00,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:51:00,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:51:00,824 WARN L228 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_38a338b5-08f5-47f4-a73e-10fdcbe474fd/sv-benchmarks/c/array-multidimensional/rev-3-u.c[319,332] [2021-11-09 09:51:00,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:51:00,867 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:51:00,882 WARN L228 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_38a338b5-08f5-47f4-a73e-10fdcbe474fd/sv-benchmarks/c/array-multidimensional/rev-3-u.c[319,332] [2021-11-09 09:51:00,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:51:00,913 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:51:00,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:51:00 WrapperNode [2021-11-09 09:51:00,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:51:00,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:51:00,916 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:51:00,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:51:00,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:51:00" (1/1) ... [2021-11-09 09:51:00,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:51:00" (1/1) ... [2021-11-09 09:51:00,967 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:51:00,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:51:00,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:51:00,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:51:00,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:51:00" (1/1) ... [2021-11-09 09:51:00,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:51:00" (1/1) ... [2021-11-09 09:51:00,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:51:00" (1/1) ... [2021-11-09 09:51:00,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:51:00" (1/1) ... [2021-11-09 09:51:00,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:51:00" (1/1) ... [2021-11-09 09:51:01,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:51:00" (1/1) ... [2021-11-09 09:51:01,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:51:00" (1/1) ... [2021-11-09 09:51:01,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:51:01,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:51:01,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:51:01,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:51:01,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:51:00" (1/1) ... [2021-11-09 09:51:01,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:51:01,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:01,080 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:51:01,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:51:01,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:51:01,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:51:01,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:51:01,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:51:01,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:51:01,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:51:01,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:51:01,624 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:51:01,625 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-09 09:51:01,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:51:01 BoogieIcfgContainer [2021-11-09 09:51:01,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:51:01,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:51:01,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:51:01,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:51:01,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:51:00" (1/3) ... [2021-11-09 09:51:01,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20786879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:51:01, skipping insertion in model container [2021-11-09 09:51:01,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:51:00" (2/3) ... [2021-11-09 09:51:01,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20786879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:51:01, skipping insertion in model container [2021-11-09 09:51:01,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:51:01" (3/3) ... [2021-11-09 09:51:01,655 INFO L111 eAbstractionObserver]: Analyzing ICFG rev-3-u.c [2021-11-09 09:51:01,662 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:51:01,662 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:51:01,723 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:51:01,731 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 [2021-11-09 09:51:01,732 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:51:01,751 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.8) internal successors, (45), 26 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) [2021-11-09 09:51:01,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 09:51:01,758 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:01,758 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:01,759 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:01,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:01,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1568356865, now seen corresponding path program 1 times [2021-11-09 09:51:01,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:01,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609198117] [2021-11-09 09:51:01,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:01,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:01,901 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:51:01,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222275552] [2021-11-09 09:51:01,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:01,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:01,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:01,912 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:01,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:51:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:02,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-09 09:51:02,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:02,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:02,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609198117] [2021-11-09 09:51:02,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:51:02,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222275552] [2021-11-09 09:51:02,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222275552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:02,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:51:02,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:51:02,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382610127] [2021-11-09 09:51:02,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:51:02,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:02,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:51:02,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:51:02,184 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.8) internal successors, (45), 26 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) [2021-11-09 09:51:02,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:02,203 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2021-11-09 09:51:02,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:51:02,205 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 [2021-11-09 09:51:02,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:02,214 INFO L225 Difference]: With dead ends: 52 [2021-11-09 09:51:02,214 INFO L226 Difference]: Without dead ends: 23 [2021-11-09 09:51:02,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:51:02,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-09 09:51:02,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-09 09:51:02,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:02,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-11-09 09:51:02,259 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 11 [2021-11-09 09:51:02,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:02,260 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-11-09 09:51:02,260 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) [2021-11-09 09:51:02,261 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-11-09 09:51:02,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 09:51:02,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:02,262 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:02,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:02,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-09 09:51:02,469 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:02,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:02,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1115669473, now seen corresponding path program 1 times [2021-11-09 09:51:02,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:02,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871409534] [2021-11-09 09:51:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:02,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:02,491 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:51:02,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1710294314] [2021-11-09 09:51:02,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:02,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:02,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:02,498 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:02,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:51:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:02,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 09:51:02,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:02,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:02,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871409534] [2021-11-09 09:51:02,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:51:02,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710294314] [2021-11-09 09:51:02,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710294314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:02,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:51:02,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:51:02,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334342859] [2021-11-09 09:51:02,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:51:02,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:02,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:51:02,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:51:02,682 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-11-09 09:51:02,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:02,791 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-11-09 09:51:02,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:51:02,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2021-11-09 09:51:02,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:02,796 INFO L225 Difference]: With dead ends: 44 [2021-11-09 09:51:02,801 INFO L226 Difference]: Without dead ends: 28 [2021-11-09 09:51:02,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:51:02,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-09 09:51:02,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-11-09 09:51:02,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:02,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2021-11-09 09:51:02,815 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 11 [2021-11-09 09:51:02,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:02,816 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2021-11-09 09:51:02,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-11-09 09:51:02,817 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2021-11-09 09:51:02,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 09:51:02,817 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:02,818 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:02,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:03,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:03,047 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:03,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:03,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1536116311, now seen corresponding path program 1 times [2021-11-09 09:51:03,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:03,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966252038] [2021-11-09 09:51:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:03,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:03,064 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:51:03,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930439558] [2021-11-09 09:51:03,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:03,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:03,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:03,066 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:03,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:51:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:03,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 09:51:03,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:03,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:03,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966252038] [2021-11-09 09:51:03,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:51:03,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930439558] [2021-11-09 09:51:03,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930439558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:03,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:51:03,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:51:03,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437687335] [2021-11-09 09:51:03,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:51:03,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:03,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:51:03,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:51:03,240 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:03,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:03,375 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2021-11-09 09:51:03,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:51:03,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-11-09 09:51:03,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:03,381 INFO L225 Difference]: With dead ends: 61 [2021-11-09 09:51:03,381 INFO L226 Difference]: Without dead ends: 40 [2021-11-09 09:51:03,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:51:03,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-09 09:51:03,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2021-11-09 09:51:03,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 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) [2021-11-09 09:51:03,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2021-11-09 09:51:03,397 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 14 [2021-11-09 09:51:03,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:03,397 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2021-11-09 09:51:03,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:03,398 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2021-11-09 09:51:03,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 09:51:03,398 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:03,399 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:03,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:03,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:03,607 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:03,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:03,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1209800511, now seen corresponding path program 1 times [2021-11-09 09:51:03,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:03,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797956549] [2021-11-09 09:51:03,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:03,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:03,646 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:51:03,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380305590] [2021-11-09 09:51:03,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:03,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:03,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:03,650 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:03,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:51:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:03,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 09:51:03,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:03,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:03,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797956549] [2021-11-09 09:51:03,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:51:03,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380305590] [2021-11-09 09:51:03,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380305590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:03,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:51:03,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:51:03,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620943833] [2021-11-09 09:51:03,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:51:03,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:03,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:51:03,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:51:03,875 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:03,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:03,955 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2021-11-09 09:51:03,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:51:03,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-11-09 09:51:03,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:03,957 INFO L225 Difference]: With dead ends: 61 [2021-11-09 09:51:03,957 INFO L226 Difference]: Without dead ends: 37 [2021-11-09 09:51:03,958 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:51:03,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-09 09:51:03,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-11-09 09:51:03,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2021-11-09 09:51:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-11-09 09:51:03,965 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2021-11-09 09:51:03,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:03,965 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-11-09 09:51:03,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:03,966 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-11-09 09:51:03,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 09:51:03,967 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:03,967 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:04,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:04,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:04,184 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:04,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:04,185 INFO L85 PathProgramCache]: Analyzing trace with hash -97783142, now seen corresponding path program 1 times [2021-11-09 09:51:04,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:04,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558949417] [2021-11-09 09:51:04,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:04,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:04,201 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:51:04,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637979232] [2021-11-09 09:51:04,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:04,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:04,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:04,209 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:04,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:51:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:04,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:51:04,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:04,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:04,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:04,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558949417] [2021-11-09 09:51:04,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:51:04,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637979232] [2021-11-09 09:51:04,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637979232] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:04,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:51:04,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-09 09:51:04,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193530925] [2021-11-09 09:51:04,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:51:04,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:04,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:51:04,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:51:04,413 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:04,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:04,537 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2021-11-09 09:51:04,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:51:04,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-09 09:51:04,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:04,539 INFO L225 Difference]: With dead ends: 71 [2021-11-09 09:51:04,539 INFO L226 Difference]: Without dead ends: 44 [2021-11-09 09:51:04,540 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:51:04,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-09 09:51:04,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-11-09 09:51:04,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:04,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-11-09 09:51:04,548 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2021-11-09 09:51:04,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:04,548 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-11-09 09:51:04,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:04,549 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-11-09 09:51:04,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 09:51:04,550 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:04,550 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:04,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:04,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:04,770 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:04,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:04,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1978170721, now seen corresponding path program 2 times [2021-11-09 09:51:04,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:04,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037820671] [2021-11-09 09:51:04,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:04,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:04,781 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:51:04,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731671563] [2021-11-09 09:51:04,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:51:04,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:04,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:04,783 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:04,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:51:04,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-09 09:51:04,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:51:04,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 09:51:04,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:51:04,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:04,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037820671] [2021-11-09 09:51:04,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:51:05,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731671563] [2021-11-09 09:51:05,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731671563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:05,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:51:05,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:51:05,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603139653] [2021-11-09 09:51:05,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:51:05,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:05,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:51:05,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:51:05,022 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:05,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:05,105 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2021-11-09 09:51:05,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:51:05,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-09 09:51:05,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:05,107 INFO L225 Difference]: With dead ends: 79 [2021-11-09 09:51:05,107 INFO L226 Difference]: Without dead ends: 64 [2021-11-09 09:51:05,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:51:05,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-09 09:51:05,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 36. [2021-11-09 09:51:05,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 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) [2021-11-09 09:51:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-11-09 09:51:05,117 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 19 [2021-11-09 09:51:05,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:05,118 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-11-09 09:51:05,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:05,118 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-11-09 09:51:05,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 09:51:05,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:05,120 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 09:51:05,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:05,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:05,347 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:05,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:05,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1749813085, now seen corresponding path program 1 times [2021-11-09 09:51:05,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:05,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045659886] [2021-11-09 09:51:05,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:05,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:05,360 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:51:05,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488875053] [2021-11-09 09:51:05,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:05,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:05,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:05,362 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:05,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:51:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:05,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 09:51:05,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:51:05,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:05,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045659886] [2021-11-09 09:51:05,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:51:05,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488875053] [2021-11-09 09:51:05,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488875053] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:05,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:51:05,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 09:51:05,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89154305] [2021-11-09 09:51:05,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:51:05,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:05,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:51:05,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:51:05,653 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:05,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:05,784 INFO L93 Difference]: Finished difference Result 83 states and 103 transitions. [2021-11-09 09:51:05,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:51:05,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-09 09:51:05,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:05,789 INFO L225 Difference]: With dead ends: 83 [2021-11-09 09:51:05,790 INFO L226 Difference]: Without dead ends: 50 [2021-11-09 09:51:05,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:51:05,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-09 09:51:05,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-11-09 09:51:05,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:05,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2021-11-09 09:51:05,816 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 27 [2021-11-09 09:51:05,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:05,816 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2021-11-09 09:51:05,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:05,817 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2021-11-09 09:51:05,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:51:05,819 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:05,819 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 09:51:05,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:06,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:06,038 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:06,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:06,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1516282694, now seen corresponding path program 2 times [2021-11-09 09:51:06,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:06,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856903830] [2021-11-09 09:51:06,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:06,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:06,063 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:51:06,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756720875] [2021-11-09 09:51:06,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:51:06,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:06,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:06,067 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:06,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:51:06,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:51:06,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:51:06,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:51:06,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 09:51:06,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:06,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856903830] [2021-11-09 09:51:06,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:51:06,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756720875] [2021-11-09 09:51:06,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756720875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:06,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:51:06,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 09:51:06,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924283984] [2021-11-09 09:51:06,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:51:06,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:06,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:51:06,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:51:06,351 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:06,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:06,477 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2021-11-09 09:51:06,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:51:06,478 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 09:51:06,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:06,481 INFO L225 Difference]: With dead ends: 95 [2021-11-09 09:51:06,481 INFO L226 Difference]: Without dead ends: 57 [2021-11-09 09:51:06,483 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:51:06,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-09 09:51:06,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-11-09 09:51:06,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 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) [2021-11-09 09:51:06,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2021-11-09 09:51:06,506 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 29 [2021-11-09 09:51:06,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:06,507 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2021-11-09 09:51:06,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2021-11-09 09:51:06,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 09:51:06,511 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:06,512 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 09:51:06,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:06,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:06,713 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:06,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:06,714 INFO L85 PathProgramCache]: Analyzing trace with hash 53106109, now seen corresponding path program 3 times [2021-11-09 09:51:06,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:06,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445090629] [2021-11-09 09:51:06,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:06,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:06,726 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:51:06,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104089631] [2021-11-09 09:51:06,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:51:06,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:06,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:06,728 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:06,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:51:06,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 09:51:06,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:51:06,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:51:06,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-09 09:51:07,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:07,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445090629] [2021-11-09 09:51:07,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:51:07,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104089631] [2021-11-09 09:51:07,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104089631] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:07,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:51:07,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-09 09:51:07,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668977755] [2021-11-09 09:51:07,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:51:07,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:07,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:51:07,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:51:07,078 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:07,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:07,229 INFO L93 Difference]: Finished difference Result 157 states and 196 transitions. [2021-11-09 09:51:07,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:51:07,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 [2021-11-09 09:51:07,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:07,234 INFO L225 Difference]: With dead ends: 157 [2021-11-09 09:51:07,234 INFO L226 Difference]: Without dead ends: 124 [2021-11-09 09:51:07,235 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:51:07,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-09 09:51:07,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 66. [2021-11-09 09:51:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 65 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:07,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2021-11-09 09:51:07,261 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 31 [2021-11-09 09:51:07,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:07,262 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2021-11-09 09:51:07,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:07,262 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2021-11-09 09:51:07,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 09:51:07,270 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:07,271 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:07,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:07,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:07,491 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:07,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:07,491 INFO L85 PathProgramCache]: Analyzing trace with hash -893728359, now seen corresponding path program 4 times [2021-11-09 09:51:07,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:07,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414791461] [2021-11-09 09:51:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:07,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:07,505 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:51:07,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373616477] [2021-11-09 09:51:07,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:51:07,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:07,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:07,508 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:07,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:51:07,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:51:07,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:51:07,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:51:07,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-09 09:51:07,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:07,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414791461] [2021-11-09 09:51:07,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:51:07,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373616477] [2021-11-09 09:51:07,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373616477] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:07,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:51:07,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 09:51:07,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637136134] [2021-11-09 09:51:07,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:51:07,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:07,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:51:07,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:51:07,855 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 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) [2021-11-09 09:51:08,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:08,059 INFO L93 Difference]: Finished difference Result 235 states and 286 transitions. [2021-11-09 09:51:08,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:51:08,060 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 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) Word has length 51 [2021-11-09 09:51:08,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:08,062 INFO L225 Difference]: With dead ends: 235 [2021-11-09 09:51:08,062 INFO L226 Difference]: Without dead ends: 163 [2021-11-09 09:51:08,063 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:51:08,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-09 09:51:08,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 117. [2021-11-09 09:51:08,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.2327586206896552) internal successors, (143), 116 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:08,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 143 transitions. [2021-11-09 09:51:08,087 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 143 transitions. Word has length 51 [2021-11-09 09:51:08,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:08,088 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 143 transitions. [2021-11-09 09:51:08,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 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) [2021-11-09 09:51:08,088 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 143 transitions. [2021-11-09 09:51:08,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-09 09:51:08,089 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:08,090 INFO L513 BasicCegarLoop]: trace histogram [16, 12, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:08,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:08,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 09:51:08,315 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:08,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:08,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1340308512, now seen corresponding path program 5 times [2021-11-09 09:51:08,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:08,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660684605] [2021-11-09 09:51:08,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:08,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:08,331 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:51:08,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729708347] [2021-11-09 09:51:08,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:51:08,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:08,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:08,333 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:08,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:53:49,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-09 09:53:49,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:50,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 09:53:50,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 121 proven. 33 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-11-09 09:53:50,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:50,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660684605] [2021-11-09 09:53:50,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:53:50,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729708347] [2021-11-09 09:53:50,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729708347] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:50,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:53:50,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-09 09:53:50,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587226167] [2021-11-09 09:53:50,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:53:50,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:50,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:53:50,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:53:50,339 INFO L87 Difference]: Start difference. First operand 117 states and 143 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-11-09 09:53:50,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:50,766 INFO L93 Difference]: Finished difference Result 308 states and 371 transitions. [2021-11-09 09:53:50,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:53:50,767 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-09 09:53:50,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:50,769 INFO L225 Difference]: With dead ends: 308 [2021-11-09 09:53:50,769 INFO L226 Difference]: Without dead ends: 209 [2021-11-09 09:53:50,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:53:50,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-09 09:53:50,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 152. [2021-11-09 09:53:50,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.2251655629139073) internal successors, (185), 151 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:50,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 185 transitions. [2021-11-09 09:53:50,809 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 185 transitions. Word has length 72 [2021-11-09 09:53:50,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:50,810 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 185 transitions. [2021-11-09 09:53:50,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-11-09 09:53:50,810 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 185 transitions. [2021-11-09 09:53:50,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-09 09:53:50,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:50,813 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:50,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:51,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 09:53:51,014 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:53:51,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:51,015 INFO L85 PathProgramCache]: Analyzing trace with hash -379466407, now seen corresponding path program 6 times [2021-11-09 09:53:51,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:51,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321422789] [2021-11-09 09:53:51,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:51,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:51,046 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:53:51,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507830086] [2021-11-09 09:53:51,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:53:51,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:51,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:51,057 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:51,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:53:51,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 09:53:51,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:51,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:53:51,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 300 proven. 10 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2021-11-09 09:53:51,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:51,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321422789] [2021-11-09 09:53:51,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:53:51,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507830086] [2021-11-09 09:53:51,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507830086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:51,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:53:51,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 09:53:51,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212036617] [2021-11-09 09:53:51,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:53:51,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:51,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:53:51,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:53:51,776 INFO L87 Difference]: Start difference. First operand 152 states and 185 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-11-09 09:53:51,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:51,907 INFO L93 Difference]: Finished difference Result 333 states and 414 transitions. [2021-11-09 09:53:51,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:53:51,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-09 09:53:51,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:51,910 INFO L225 Difference]: With dead ends: 333 [2021-11-09 09:53:51,910 INFO L226 Difference]: Without dead ends: 190 [2021-11-09 09:53:51,911 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:53:51,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-09 09:53:51,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 173. [2021-11-09 09:53:51,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.2151162790697674) internal successors, (209), 172 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:51,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 209 transitions. [2021-11-09 09:53:51,938 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 209 transitions. Word has length 107 [2021-11-09 09:53:51,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:51,938 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 209 transitions. [2021-11-09 09:53:51,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-11-09 09:53:51,939 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 209 transitions. [2021-11-09 09:53:51,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-09 09:53:51,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:51,941 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:51,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:52,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 09:53:52,164 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:53:52,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:52,165 INFO L85 PathProgramCache]: Analyzing trace with hash 715997825, now seen corresponding path program 7 times [2021-11-09 09:53:52,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:52,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663599483] [2021-11-09 09:53:52,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:52,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:52,181 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:53:52,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089507345] [2021-11-09 09:53:52,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:53:52,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:52,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:52,190 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:52,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 09:53:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:52,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 09:53:52,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 189 proven. 15 refuted. 0 times theorem prover too weak. 1150 trivial. 0 not checked. [2021-11-09 09:53:52,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:52,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663599483] [2021-11-09 09:53:52,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:53:52,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089507345] [2021-11-09 09:53:52,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089507345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:52,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:53:52,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 09:53:52,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5040036] [2021-11-09 09:53:52,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:53:52,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:52,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:53:52,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:53:52,928 INFO L87 Difference]: Start difference. First operand 173 states and 209 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:53,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:53,083 INFO L93 Difference]: Finished difference Result 376 states and 462 transitions. [2021-11-09 09:53:53,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:53:53,083 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-09 09:53:53,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:53,085 INFO L225 Difference]: With dead ends: 376 [2021-11-09 09:53:53,086 INFO L226 Difference]: Without dead ends: 213 [2021-11-09 09:53:53,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:53:53,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-09 09:53:53,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 194. [2021-11-09 09:53:53,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.2072538860103628) internal successors, (233), 193 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:53,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 233 transitions. [2021-11-09 09:53:53,116 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 233 transitions. Word has length 119 [2021-11-09 09:53:53,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:53,116 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 233 transitions. [2021-11-09 09:53:53,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:53,117 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 233 transitions. [2021-11-09 09:53:53,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-09 09:53:53,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:53,118 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:53,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:53,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:53,335 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:53:53,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:53,336 INFO L85 PathProgramCache]: Analyzing trace with hash -47562599, now seen corresponding path program 8 times [2021-11-09 09:53:53,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:53,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552877833] [2021-11-09 09:53:53,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:53,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:53,369 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:53:53,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206076103] [2021-11-09 09:53:53,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:53:53,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:53,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:53,372 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:53,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 09:53:53,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:53:53,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:53,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 09:53:53,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:54,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1816 backedges. 254 proven. 21 refuted. 0 times theorem prover too weak. 1541 trivial. 0 not checked. [2021-11-09 09:53:54,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:54,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552877833] [2021-11-09 09:53:54,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:53:54,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206076103] [2021-11-09 09:53:54,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206076103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:54,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:53:54,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-09 09:53:54,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860567588] [2021-11-09 09:53:54,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:53:54,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:54,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:53:54,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:53:54,184 INFO L87 Difference]: Start difference. First operand 194 states and 233 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:54,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:54,334 INFO L93 Difference]: Finished difference Result 419 states and 510 transitions. [2021-11-09 09:53:54,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:53:54,335 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 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 131 [2021-11-09 09:53:54,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:54,337 INFO L225 Difference]: With dead ends: 419 [2021-11-09 09:53:54,337 INFO L226 Difference]: Without dead ends: 236 [2021-11-09 09:53:54,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:53:54,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-09 09:53:54,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 215. [2021-11-09 09:53:54,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.2009345794392523) internal successors, (257), 214 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:54,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 257 transitions. [2021-11-09 09:53:54,370 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 257 transitions. Word has length 131 [2021-11-09 09:53:54,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:54,371 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 257 transitions. [2021-11-09 09:53:54,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:54,372 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 257 transitions. [2021-11-09 09:53:54,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-09 09:53:54,376 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:54,376 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:54,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:54,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 09:53:54,603 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:53:54,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:54,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1188232641, now seen corresponding path program 9 times [2021-11-09 09:53:54,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:54,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867932113] [2021-11-09 09:53:54,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:54,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:54,635 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:53:54,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503185791] [2021-11-09 09:53:54,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:53:54,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:54,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:54,643 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:54,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38a338b5-08f5-47f4-a73e-10fdcbe474fd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process