./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/divmul_diverge.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/divmul_diverge.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0 --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 6ffdc119181aa2456330d740041ecbf5eb23a58830499150b547bc21d0f8f549 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:23:14,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:23:14,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:23:14,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:23:14,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:23:14,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:23:14,867 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:23:14,871 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:23:14,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:23:14,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:23:14,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:23:14,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:23:14,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:23:14,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:23:14,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:23:14,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:23:14,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:23:14,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:23:14,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:23:14,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:23:14,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:23:14,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:23:14,911 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:23:14,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:23:14,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:23:14,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:23:14,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:23:14,925 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:23:14,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:23:14,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:23:14,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:23:14,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:23:14,931 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:23:14,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:23:14,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:23:14,934 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:23:14,935 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:23:14,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:23:14,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:23:14,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:23:14,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:23:14,938 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 14:23:14,980 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:23:14,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:23:14,981 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:23:14,981 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:23:14,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:23:14,990 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:23:14,990 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:23:14,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:23:14,991 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:23:14,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:23:14,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:23:14,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:23:14,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:23:14,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:23:14,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:23:14,994 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:23:14,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:23:14,994 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:23:14,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:23:14,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:23:14,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:23:14,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:23:14,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:23:14,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:23:14,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:23:14,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:23:14,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:23:14,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 14:23:14,998 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:23:14,998 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:23:14,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:23:14,999 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:23:14,999 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_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ffdc119181aa2456330d740041ecbf5eb23a58830499150b547bc21d0f8f549 [2021-11-22 14:23:15,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:23:15,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:23:15,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:23:15,313 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:23:15,314 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:23:15,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/float-benchs/divmul_diverge.c [2021-11-22 14:23:15,379 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/data/bd66d9438/5e5ad8bbdf8347db9bcaf2559da5d8d5/FLAG45e3f92fc [2021-11-22 14:23:15,885 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:23:15,886 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/sv-benchmarks/c/float-benchs/divmul_diverge.c [2021-11-22 14:23:15,898 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/data/bd66d9438/5e5ad8bbdf8347db9bcaf2559da5d8d5/FLAG45e3f92fc [2021-11-22 14:23:16,278 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/data/bd66d9438/5e5ad8bbdf8347db9bcaf2559da5d8d5 [2021-11-22 14:23:16,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:23:16,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:23:16,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:23:16,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:23:16,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:23:16,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:23:16" (1/1) ... [2021-11-22 14:23:16,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@700ee49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:16, skipping insertion in model container [2021-11-22 14:23:16,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:23:16" (1/1) ... [2021-11-22 14:23:16,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:23:16,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:23:16,501 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/sv-benchmarks/c/float-benchs/divmul_diverge.c[613,626] [2021-11-22 14:23:16,518 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:23:16,526 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:23:16,538 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/sv-benchmarks/c/float-benchs/divmul_diverge.c[613,626] [2021-11-22 14:23:16,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:23:16,554 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:23:16,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:16 WrapperNode [2021-11-22 14:23:16,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:23:16,556 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:23:16,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:23:16,556 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:23:16,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:16" (1/1) ... [2021-11-22 14:23:16,571 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:16" (1/1) ... [2021-11-22 14:23:16,589 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 43 [2021-11-22 14:23:16,589 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:23:16,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:23:16,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:23:16,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:23:16,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:16" (1/1) ... [2021-11-22 14:23:16,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:16" (1/1) ... [2021-11-22 14:23:16,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:16" (1/1) ... [2021-11-22 14:23:16,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:16" (1/1) ... [2021-11-22 14:23:16,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:16" (1/1) ... [2021-11-22 14:23:16,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:16" (1/1) ... [2021-11-22 14:23:16,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:16" (1/1) ... [2021-11-22 14:23:16,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:23:16,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:23:16,611 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:23:16,611 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:23:16,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:16" (1/1) ... [2021-11-22 14:23:16,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:23:16,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:23:16,643 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:23:16,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:23:16,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:23:16,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 14:23:16,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:23:16,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:23:16,744 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:23:16,745 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:23:16,861 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:23:16,869 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:23:16,876 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-22 14:23:16,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:23:16 BoogieIcfgContainer [2021-11-22 14:23:16,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:23:16,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:23:16,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:23:16,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:23:16,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:23:16" (1/3) ... [2021-11-22 14:23:16,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3524538e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:23:16, skipping insertion in model container [2021-11-22 14:23:16,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:16" (2/3) ... [2021-11-22 14:23:16,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3524538e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:23:16, skipping insertion in model container [2021-11-22 14:23:16,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:23:16" (3/3) ... [2021-11-22 14:23:16,899 INFO L111 eAbstractionObserver]: Analyzing ICFG divmul_diverge.c [2021-11-22 14:23:16,904 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:23:16,917 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 14:23:16,998 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:23:17,018 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 [2021-11-22 14:23:17,018 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 14:23:17,050 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:23:17,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-22 14:23:17,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:23:17,056 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-22 14:23:17,056 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:23:17,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:23:17,062 INFO L85 PathProgramCache]: Analyzing trace with hash 889620925, now seen corresponding path program 1 times [2021-11-22 14:23:17,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:23:17,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060215806] [2021-11-22 14:23:17,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:23:17,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:23:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:23:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:23:17,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:23:17,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060215806] [2021-11-22 14:23:17,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060215806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:23:17,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:23:17,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:23:17,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492586808] [2021-11-22 14:23:17,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:23:17,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:23:17,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:23:17,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:23:17,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:23:17,302 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:23:17,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:23:17,345 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2021-11-22 14:23:17,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:23:17,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-22 14:23:17,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:23:17,357 INFO L225 Difference]: With dead ends: 39 [2021-11-22 14:23:17,358 INFO L226 Difference]: Without dead ends: 20 [2021-11-22 14:23:17,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:23:17,367 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:23:17,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:23:17,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-22 14:23:17,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2021-11-22 14:23:17,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:23:17,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-22 14:23:17,432 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 6 [2021-11-22 14:23:17,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:23:17,432 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-22 14:23:17,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:23:17,435 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-22 14:23:17,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 14:23:17,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:23:17,436 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:23:17,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 14:23:17,437 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:23:17,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:23:17,442 INFO L85 PathProgramCache]: Analyzing trace with hash -875759451, now seen corresponding path program 1 times [2021-11-22 14:23:17,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:23:17,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973150472] [2021-11-22 14:23:17,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:23:17,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:23:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:23:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:23:17,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:23:17,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973150472] [2021-11-22 14:23:17,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973150472] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:23:17,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892821338] [2021-11-22 14:23:17,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:23:17,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:23:17,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:23:17,518 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:23:17,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 14:23:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:23:17,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 14:23:17,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:23:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:23:17,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:23:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:23:17,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892821338] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:23:17,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:23:17,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 14:23:17,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344931376] [2021-11-22 14:23:17,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:23:17,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:23:17,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:23:17,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:23:17,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:23:17,687 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:23:17,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:23:17,720 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-11-22 14:23:17,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:23:17,720 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-22 14:23:17,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:23:17,722 INFO L225 Difference]: With dead ends: 39 [2021-11-22 14:23:17,722 INFO L226 Difference]: Without dead ends: 35 [2021-11-22 14:23:17,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:23:17,724 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:23:17,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 44 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:23:17,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-22 14:23:17,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-22 14:23:17,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:23:17,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-11-22 14:23:17,733 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 11 [2021-11-22 14:23:17,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:23:17,734 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-11-22 14:23:17,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:23:17,734 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-11-22 14:23:17,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-22 14:23:17,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:23:17,735 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-22 14:23:17,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-22 14:23:17,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:23:17,951 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:23:17,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:23:17,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1424528451, now seen corresponding path program 2 times [2021-11-22 14:23:17,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:23:17,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109039207] [2021-11-22 14:23:17,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:23:17,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:23:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:23:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:23:18,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:23:18,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109039207] [2021-11-22 14:23:18,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109039207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:23:18,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496037851] [2021-11-22 14:23:18,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:23:18,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:23:18,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:23:18,069 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:23:18,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 14:23:18,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:23:18,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:23:18,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 14:23:18,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:23:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:23:18,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:23:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:23:18,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496037851] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:23:18,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:23:18,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-22 14:23:18,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865818211] [2021-11-22 14:23:18,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:23:18,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-22 14:23:18,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:23:18,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-22 14:23:18,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-22 14:23:18,337 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:23:18,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:23:18,421 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2021-11-22 14:23:18,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 14:23:18,422 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-22 14:23:18,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:23:18,426 INFO L225 Difference]: With dead ends: 81 [2021-11-22 14:23:18,426 INFO L226 Difference]: Without dead ends: 77 [2021-11-22 14:23:18,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-22 14:23:18,431 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:23:18,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 90 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:23:18,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-22 14:23:18,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-11-22 14:23:18,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.144736842105263) internal successors, (87), 76 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:23:18,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2021-11-22 14:23:18,456 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 26 [2021-11-22 14:23:18,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:23:18,457 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2021-11-22 14:23:18,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:23:18,457 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2021-11-22 14:23:18,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-22 14:23:18,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:23:18,459 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-11-22 14:23:18,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 14:23:18,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:23:18,663 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:23:18,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:23:18,664 INFO L85 PathProgramCache]: Analyzing trace with hash -998809923, now seen corresponding path program 3 times [2021-11-22 14:23:18,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:23:18,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538553219] [2021-11-22 14:23:18,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:23:18,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:23:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:23:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:23:18,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:23:18,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538553219] [2021-11-22 14:23:18,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538553219] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:23:18,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120844819] [2021-11-22 14:23:18,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:23:18,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:23:18,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:23:18,922 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:23:18,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 14:23:18,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-22 14:23:18,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:23:18,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 14:23:18,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:23:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:23:19,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:23:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:23:19,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120844819] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:23:19,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:23:19,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-11-22 14:23:19,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117979387] [2021-11-22 14:23:19,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:23:19,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-22 14:23:19,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:23:19,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-22 14:23:19,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-22 14:23:19,594 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:23:19,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:23:19,746 INFO L93 Difference]: Finished difference Result 165 states and 198 transitions. [2021-11-22 14:23:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-22 14:23:19,748 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-22 14:23:19,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:23:19,753 INFO L225 Difference]: With dead ends: 165 [2021-11-22 14:23:19,753 INFO L226 Difference]: Without dead ends: 161 [2021-11-22 14:23:19,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-22 14:23:19,759 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 277 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:23:19,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 154 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:23:19,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-22 14:23:19,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-11-22 14:23:19,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.14375) internal successors, (183), 160 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:23:19,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 183 transitions. [2021-11-22 14:23:19,784 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 183 transitions. Word has length 56 [2021-11-22 14:23:19,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:23:19,784 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 183 transitions. [2021-11-22 14:23:19,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:23:19,785 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 183 transitions. [2021-11-22 14:23:19,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-22 14:23:19,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:23:19,800 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2021-11-22 14:23:19,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-22 14:23:20,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:23:20,018 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:23:20,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:23:20,018 INFO L85 PathProgramCache]: Analyzing trace with hash 870679741, now seen corresponding path program 4 times [2021-11-22 14:23:20,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:23:20,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595194460] [2021-11-22 14:23:20,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:23:20,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:23:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:23:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:23:20,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:23:20,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595194460] [2021-11-22 14:23:20,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595194460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:23:20,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403316490] [2021-11-22 14:23:20,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 14:23:20,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:23:20,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:23:20,447 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:23:20,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 14:23:20,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 14:23:20,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:23:20,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-22 14:23:20,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:23:20,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:23:20,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:23:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:23:21,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403316490] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:23:21,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:23:21,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-11-22 14:23:21,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161437925] [2021-11-22 14:23:21,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:23:21,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-22 14:23:21,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:23:21,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-22 14:23:21,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-22 14:23:21,805 INFO L87 Difference]: Start difference. First operand 161 states and 183 transitions. Second operand has 49 states, 49 states have (on average 4.775510204081633) internal successors, (234), 49 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:23:22,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:23:22,093 INFO L93 Difference]: Finished difference Result 333 states and 402 transitions. [2021-11-22 14:23:22,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-22 14:23:22,094 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.775510204081633) internal successors, (234), 49 states have internal predecessors, (234), 0 states have call successors, (0), 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 116 [2021-11-22 14:23:22,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:23:22,097 INFO L225 Difference]: With dead ends: 333 [2021-11-22 14:23:22,097 INFO L226 Difference]: Without dead ends: 329 [2021-11-22 14:23:22,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-22 14:23:22,099 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 810 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:23:22,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [810 Valid, 298 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:23:22,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-22 14:23:22,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2021-11-22 14:23:22,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.1432926829268293) internal successors, (375), 328 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:23:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 375 transitions. [2021-11-22 14:23:22,121 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 375 transitions. Word has length 116 [2021-11-22 14:23:22,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:23:22,122 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 375 transitions. [2021-11-22 14:23:22,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.775510204081633) internal successors, (234), 49 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:23:22,122 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 375 transitions. [2021-11-22 14:23:22,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-22 14:23:22,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:23:22,127 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2021-11-22 14:23:22,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 14:23:22,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:23:22,350 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:23:22,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:23:22,350 INFO L85 PathProgramCache]: Analyzing trace with hash 582668477, now seen corresponding path program 5 times [2021-11-22 14:23:22,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:23:22,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311005002] [2021-11-22 14:23:22,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:23:22,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:23:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:23:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:23:23,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:23:23,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311005002] [2021-11-22 14:23:23,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311005002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:23:23,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598386799] [2021-11-22 14:23:23,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 14:23:23,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:23:23,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:23:23,558 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:23:23,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 14:23:23,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-11-22 14:23:23,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:23:23,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-22 14:23:23,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:23:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:23:24,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:23:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:23:27,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598386799] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:23:27,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:23:27,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2021-11-22 14:23:27,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889386221] [2021-11-22 14:23:27,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:23:27,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-22 14:23:27,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:23:27,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-22 14:23:27,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-11-22 14:23:27,174 INFO L87 Difference]: Start difference. First operand 329 states and 375 transitions. Second operand has 97 states, 97 states have (on average 4.88659793814433) internal successors, (474), 97 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:23:28,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:23:28,410 INFO L93 Difference]: Finished difference Result 669 states and 810 transitions. [2021-11-22 14:23:28,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-22 14:23:28,411 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.88659793814433) internal successors, (474), 97 states have internal predecessors, (474), 0 states have call successors, (0), 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 236 [2021-11-22 14:23:28,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:23:28,416 INFO L225 Difference]: With dead ends: 669 [2021-11-22 14:23:28,416 INFO L226 Difference]: Without dead ends: 665 [2021-11-22 14:23:28,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-11-22 14:23:28,422 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1800 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1800 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:23:28,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1800 Valid, 586 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 14:23:28,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-11-22 14:23:28,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2021-11-22 14:23:28,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 1.1430722891566265) internal successors, (759), 664 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:23:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 759 transitions. [2021-11-22 14:23:28,447 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 759 transitions. Word has length 236 [2021-11-22 14:23:28,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:23:28,448 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 759 transitions. [2021-11-22 14:23:28,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.88659793814433) internal successors, (474), 97 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:23:28,448 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 759 transitions. [2021-11-22 14:23:28,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-11-22 14:23:28,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:23:28,460 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1] [2021-11-22 14:23:28,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 14:23:28,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:23:28,682 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:23:28,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:23:28,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1974900547, now seen corresponding path program 6 times [2021-11-22 14:23:28,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:23:28,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280714165] [2021-11-22 14:23:28,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:23:28,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:23:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:23:32,280 INFO L134 CoverageAnalysis]: Checked inductivity of 21949 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:23:32,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:23:32,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280714165] [2021-11-22 14:23:32,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280714165] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:23:32,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375853983] [2021-11-22 14:23:32,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 14:23:32,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:23:32,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:23:32,284 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:23:32,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 14:23:32,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2021-11-22 14:23:32,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:23:32,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-22 14:23:32,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:23:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 21949 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:23:33,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:23:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 21949 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:23:43,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375853983] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:23:43,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:23:43,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2021-11-22 14:23:43,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223541650] [2021-11-22 14:23:43,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:23:43,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-11-22 14:23:43,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:23:43,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-11-22 14:23:43,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2021-11-22 14:23:43,113 INFO L87 Difference]: Start difference. First operand 665 states and 759 transitions. Second operand has 193 states, 193 states have (on average 4.94300518134715) internal successors, (954), 193 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:23:54,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:23:54,218 INFO L93 Difference]: Finished difference Result 1341 states and 1626 transitions. [2021-11-22 14:23:54,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-22 14:23:54,219 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 4.94300518134715) internal successors, (954), 193 states have internal predecessors, (954), 0 states have call successors, (0), 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 476 [2021-11-22 14:23:54,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:23:54,226 INFO L225 Difference]: With dead ends: 1341 [2021-11-22 14:23:54,226 INFO L226 Difference]: Without dead ends: 1337 [2021-11-22 14:23:54,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1047 GetRequests, 856 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2021-11-22 14:23:54,232 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 4323 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4323 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:23:54,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4323 Valid, 1156 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 14:23:54,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-11-22 14:23:54,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1337. [2021-11-22 14:23:54,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 1.1429640718562875) internal successors, (1527), 1336 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:23:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 1527 transitions. [2021-11-22 14:23:54,267 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 1527 transitions. Word has length 476 [2021-11-22 14:23:54,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:23:54,268 INFO L470 AbstractCegarLoop]: Abstraction has 1337 states and 1527 transitions. [2021-11-22 14:23:54,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 4.94300518134715) internal successors, (954), 193 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:23:54,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 1527 transitions. [2021-11-22 14:23:54,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 957 [2021-11-22 14:23:54,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:23:54,309 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 190, 190, 1, 1, 1, 1, 1, 1] [2021-11-22 14:23:54,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-22 14:23:54,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-22 14:23:54,534 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:23:54,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:23:54,534 INFO L85 PathProgramCache]: Analyzing trace with hash -789145411, now seen corresponding path program 7 times [2021-11-22 14:23:54,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:23:54,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212256504] [2021-11-22 14:23:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:23:54,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:23:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:24:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 89965 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:24:06,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:24:06,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212256504] [2021-11-22 14:24:06,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212256504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:24:06,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708666103] [2021-11-22 14:24:06,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 14:24:06,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:24:06,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:24:06,866 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:24:06,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 14:24:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:24:07,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 1745 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-22 14:24:07,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:24:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 89965 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:24:08,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:24:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 89965 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:24:45,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708666103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:24:45,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:24:45,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2021-11-22 14:24:45,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106550124] [2021-11-22 14:24:45,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:24:45,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2021-11-22 14:24:45,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:24:45,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2021-11-22 14:24:45,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2021-11-22 14:24:45,485 INFO L87 Difference]: Start difference. First operand 1337 states and 1527 transitions. Second operand has 385 states, 385 states have (on average 4.9714285714285715) internal successors, (1914), 385 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:27:33,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:27:33,590 INFO L93 Difference]: Finished difference Result 2685 states and 3258 transitions. [2021-11-22 14:27:33,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-22 14:27:33,591 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 4.9714285714285715) internal successors, (1914), 385 states have internal predecessors, (1914), 0 states have call successors, (0), 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 956 [2021-11-22 14:27:33,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:27:33,607 INFO L225 Difference]: With dead ends: 2685 [2021-11-22 14:27:33,607 INFO L226 Difference]: Without dead ends: 2681 [2021-11-22 14:27:33,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2103 GetRequests, 1720 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 46.0s TimeCoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2021-11-22 14:27:33,620 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8565 mSDsluCounter, 2316 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8565 SdHoareTripleChecker+Valid, 2328 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 14:27:33,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8565 Valid, 2328 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-22 14:27:33,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2021-11-22 14:27:33,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2681. [2021-11-22 14:27:33,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2681 states, 2680 states have (on average 1.142910447761194) internal successors, (3063), 2680 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:27:33,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2681 states to 2681 states and 3063 transitions. [2021-11-22 14:27:33,686 INFO L78 Accepts]: Start accepts. Automaton has 2681 states and 3063 transitions. Word has length 956 [2021-11-22 14:27:33,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:27:33,687 INFO L470 AbstractCegarLoop]: Abstraction has 2681 states and 3063 transitions. [2021-11-22 14:27:33,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 4.9714285714285715) internal successors, (1914), 385 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:27:33,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2681 states and 3063 transitions. [2021-11-22 14:27:33,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1917 [2021-11-22 14:27:33,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:27:33,718 INFO L514 BasicCegarLoop]: trace histogram [382, 382, 382, 382, 382, 1, 1, 1, 1, 1, 1] [2021-11-22 14:27:33,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-22 14:27:33,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:33,919 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:27:33,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:27:33,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1131349827, now seen corresponding path program 8 times [2021-11-22 14:27:33,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:27:33,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550257295] [2021-11-22 14:27:33,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:27:33,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:27:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:28:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 364237 backedges. 0 proven. 364237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:28:21,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:28:21,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550257295] [2021-11-22 14:28:21,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550257295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:28:21,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298089075] [2021-11-22 14:28:21,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:28:21,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:28:21,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:28:21,826 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:28:21,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9445c8d-ba71-4273-9b01-1a0d50571dc0/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 14:28:22,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:28:22,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:28:22,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 3473 conjuncts, 384 conjunts are in the unsatisfiable core [2021-11-22 14:28:22,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:28:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 364237 backedges. 0 proven. 364237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:28:25,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:30:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 364237 backedges. 0 proven. 364237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:30:49,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298089075] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:30:49,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:30:49,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [385, 385, 385] total 769 [2021-11-22 14:30:49,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252314560] [2021-11-22 14:30:49,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:30:49,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2021-11-22 14:30:49,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:30:49,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2021-11-22 14:30:49,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295296, Invalid=295296, Unknown=0, NotChecked=0, Total=590592 [2021-11-22 14:30:49,214 INFO L87 Difference]: Start difference. First operand 2681 states and 3063 transitions. Second operand has 769 states, 769 states have (on average 4.985695708712614) internal successors, (3834), 769 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)