./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/min-2-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/min-2-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU --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 68785685c781649dca8a870a36ccbd5837fb99f65c0418361b1a73f7848e1bda --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:27:35,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:27:35,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:27:35,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:27:35,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:27:35,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:27:35,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:27:35,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:27:35,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:27:35,568 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:27:35,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:27:35,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:27:35,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:27:35,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:27:35,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:27:35,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:27:35,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:27:35,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:27:35,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:27:35,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:27:35,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:27:35,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:27:35,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:27:35,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:27:35,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:27:35,609 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:27:35,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:27:35,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:27:35,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:27:35,613 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:27:35,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:27:35,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:27:35,617 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:27:35,618 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:27:35,619 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:27:35,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:27:35,620 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:27:35,620 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:27:35,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:27:35,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:27:35,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:27:35,623 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:27:35,662 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:27:35,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:27:35,663 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:27:35,663 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:27:35,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:27:35,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:27:35,665 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:27:35,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:27:35,666 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:27:35,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:27:35,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:27:35,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:27:35,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:27:35,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:27:35,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:27:35,668 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:27:35,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:27:35,668 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:27:35,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:27:35,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:27:35,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:27:35,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:27:35,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:27:35,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:27:35,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:27:35,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:27:35,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:27:35,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:27:35,670 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:27:35,672 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:27:35,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:27:35,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:27:35,672 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_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68785685c781649dca8a870a36ccbd5837fb99f65c0418361b1a73f7848e1bda [2021-11-02 22:27:35,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:27:35,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:27:35,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:27:35,956 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:27:35,957 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:27:35,958 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/array-multidimensional/min-2-u.c [2021-11-02 22:27:36,021 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/data/32a0fab28/bfe57082d1b143699fe11c17c15d5d65/FLAGad53212e1 [2021-11-02 22:27:36,472 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:27:36,473 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/sv-benchmarks/c/array-multidimensional/min-2-u.c [2021-11-02 22:27:36,479 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/data/32a0fab28/bfe57082d1b143699fe11c17c15d5d65/FLAGad53212e1 [2021-11-02 22:27:36,852 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/data/32a0fab28/bfe57082d1b143699fe11c17c15d5d65 [2021-11-02 22:27:36,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:27:36,858 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:27:36,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:27:36,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:27:36,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:27:36,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:27:36" (1/1) ... [2021-11-02 22:27:36,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@436f6b28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:36, skipping insertion in model container [2021-11-02 22:27:36,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:27:36" (1/1) ... [2021-11-02 22:27:36,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:27:36,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:27:37,078 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/sv-benchmarks/c/array-multidimensional/min-2-u.c[319,332] [2021-11-02 22:27:37,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:27:37,113 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:27:37,123 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/sv-benchmarks/c/array-multidimensional/min-2-u.c[319,332] [2021-11-02 22:27:37,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:27:37,145 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:27:37,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:37 WrapperNode [2021-11-02 22:27:37,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:27:37,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:27:37,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:27:37,147 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:27:37,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:37" (1/1) ... [2021-11-02 22:27:37,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:37" (1/1) ... [2021-11-02 22:27:37,195 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:27:37,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:27:37,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:27:37,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:27:37,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:37" (1/1) ... [2021-11-02 22:27:37,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:37" (1/1) ... [2021-11-02 22:27:37,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:37" (1/1) ... [2021-11-02 22:27:37,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:37" (1/1) ... [2021-11-02 22:27:37,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:37" (1/1) ... [2021-11-02 22:27:37,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:37" (1/1) ... [2021-11-02 22:27:37,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:37" (1/1) ... [2021-11-02 22:27:37,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:27:37,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:27:37,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:27:37,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:27:37,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:37" (1/1) ... [2021-11-02 22:27:37,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:27:37,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:37,286 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:27:37,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:27:37,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:27:37,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:27:37,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:27:37,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:27:37,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:27:37,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:27:37,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:27:37,556 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:27:37,556 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-02 22:27:37,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:27:37 BoogieIcfgContainer [2021-11-02 22:27:37,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:27:37,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:27:37,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:27:37,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:27:37,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:27:36" (1/3) ... [2021-11-02 22:27:37,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c20875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:27:37, skipping insertion in model container [2021-11-02 22:27:37,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:37" (2/3) ... [2021-11-02 22:27:37,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c20875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:27:37, skipping insertion in model container [2021-11-02 22:27:37,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:27:37" (3/3) ... [2021-11-02 22:27:37,566 INFO L111 eAbstractionObserver]: Analyzing ICFG min-2-u.c [2021-11-02 22:27:37,570 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:27:37,571 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:27:37,615 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:27:37,622 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 [2021-11-02 22:27:37,622 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:27:37,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:37,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 22:27:37,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:37,667 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:37,668 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:37,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:37,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1824316411, now seen corresponding path program 1 times [2021-11-02 22:27:37,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:37,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840733356] [2021-11-02 22:27:37,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:37,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:37,796 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:27:37,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576776099] [2021-11-02 22:27:37,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:37,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:37,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:37,813 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:37,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:27:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:37,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:27:37,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:27:38,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:38,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840733356] [2021-11-02 22:27:38,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:27:38,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576776099] [2021-11-02 22:27:38,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576776099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:38,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:38,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:27:38,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664105383] [2021-11-02 22:27:38,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:27:38,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:38,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:27:38,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:27:38,041 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:38,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:38,088 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2021-11-02 22:27:38,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:27:38,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-11-02 22:27:38,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:38,097 INFO L225 Difference]: With dead ends: 47 [2021-11-02 22:27:38,097 INFO L226 Difference]: Without dead ends: 22 [2021-11-02 22:27:38,100 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:27:38,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-02 22:27:38,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-11-02 22:27:38,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-11-02 22:27:38,136 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 10 [2021-11-02 22:27:38,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:38,137 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-11-02 22:27:38,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:38,139 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2021-11-02 22:27:38,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-02 22:27:38,140 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:38,140 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:38,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:38,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-02 22:27:38,366 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:38,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:38,367 INFO L85 PathProgramCache]: Analyzing trace with hash 435710502, now seen corresponding path program 1 times [2021-11-02 22:27:38,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:38,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388675417] [2021-11-02 22:27:38,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:38,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:38,382 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:27:38,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725524671] [2021-11-02 22:27:38,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:38,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:38,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:38,384 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:38,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:27:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:38,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:27:38,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:27:38,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:38,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388675417] [2021-11-02 22:27:38,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:27:38,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725524671] [2021-11-02 22:27:38,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725524671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:38,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:38,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:27:38,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497697946] [2021-11-02 22:27:38,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:27:38,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:38,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:27:38,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:27:38,514 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:38,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:38,563 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2021-11-02 22:27:38,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:27:38,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-02 22:27:38,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:38,564 INFO L225 Difference]: With dead ends: 49 [2021-11-02 22:27:38,564 INFO L226 Difference]: Without dead ends: 32 [2021-11-02 22:27:38,565 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:27:38,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-02 22:27:38,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-11-02 22:27:38,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:38,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-11-02 22:27:38,571 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 13 [2021-11-02 22:27:38,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:38,572 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-11-02 22:27:38,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:38,572 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-11-02 22:27:38,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 22:27:38,573 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:38,573 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:38,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:38,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:38,798 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:38,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:38,799 INFO L85 PathProgramCache]: Analyzing trace with hash -263900950, now seen corresponding path program 1 times [2021-11-02 22:27:38,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:38,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141793056] [2021-11-02 22:27:38,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:38,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:38,811 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:27:38,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953725063] [2021-11-02 22:27:38,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:38,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:38,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:38,822 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:38,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:27:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:38,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:27:38,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:39,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:27:39,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:39,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141793056] [2021-11-02 22:27:39,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:27:39,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953725063] [2021-11-02 22:27:39,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953725063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:39,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:27:39,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-02 22:27:39,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694511221] [2021-11-02 22:27:39,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:27:39,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:39,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:27:39,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:27:39,023 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:39,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:39,113 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2021-11-02 22:27:39,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:27:39,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-02 22:27:39,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:39,114 INFO L225 Difference]: With dead ends: 61 [2021-11-02 22:27:39,115 INFO L226 Difference]: Without dead ends: 41 [2021-11-02 22:27:39,115 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:27:39,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-02 22:27:39,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2021-11-02 22:27:39,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:39,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-11-02 22:27:39,125 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 14 [2021-11-02 22:27:39,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:39,126 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-11-02 22:27:39,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:39,126 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-11-02 22:27:39,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 22:27:39,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:39,128 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:39,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:39,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:39,338 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:39,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:39,339 INFO L85 PathProgramCache]: Analyzing trace with hash -477019482, now seen corresponding path program 2 times [2021-11-02 22:27:39,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:39,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151883591] [2021-11-02 22:27:39,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:39,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:39,349 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:27:39,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331382390] [2021-11-02 22:27:39,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:27:39,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:39,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:39,351 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:39,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:27:39,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 22:27:39,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:27:39,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:27:39,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:27:39,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:39,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151883591] [2021-11-02 22:27:39,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:27:39,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331382390] [2021-11-02 22:27:39,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331382390] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:39,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:39,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:27:39,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740889201] [2021-11-02 22:27:39,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:27:39,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:39,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:27:39,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:27:39,496 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:39,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:39,541 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2021-11-02 22:27:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:27:39,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-02 22:27:39,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:39,543 INFO L225 Difference]: With dead ends: 66 [2021-11-02 22:27:39,543 INFO L226 Difference]: Without dead ends: 54 [2021-11-02 22:27:39,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:27:39,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-02 22:27:39,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 31. [2021-11-02 22:27:39,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 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) [2021-11-02 22:27:39,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-11-02 22:27:39,551 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 15 [2021-11-02 22:27:39,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:39,551 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-11-02 22:27:39,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:39,552 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-11-02 22:27:39,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 22:27:39,553 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:39,553 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:39,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:39,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:39,774 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:39,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:39,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1114279158, now seen corresponding path program 1 times [2021-11-02 22:27:39,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:39,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415796413] [2021-11-02 22:27:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:39,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:39,792 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:27:39,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684083902] [2021-11-02 22:27:39,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:39,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:39,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:39,795 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:39,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:27:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:39,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:27:39,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 22:27:40,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:40,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415796413] [2021-11-02 22:27:40,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:27:40,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684083902] [2021-11-02 22:27:40,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684083902] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:40,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:27:40,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 22:27:40,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300893263] [2021-11-02 22:27:40,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:27:40,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:40,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:27:40,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:27:40,009 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2021-11-02 22:27:40,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:40,092 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2021-11-02 22:27:40,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:27:40,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) Word has length 24 [2021-11-02 22:27:40,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:40,095 INFO L225 Difference]: With dead ends: 77 [2021-11-02 22:27:40,095 INFO L226 Difference]: Without dead ends: 49 [2021-11-02 22:27:40,096 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:27:40,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-02 22:27:40,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2021-11-02 22:27:40,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:40,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-11-02 22:27:40,115 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2021-11-02 22:27:40,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:40,116 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-11-02 22:27:40,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2021-11-02 22:27:40,116 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-11-02 22:27:40,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 22:27:40,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:40,117 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:40,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:40,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:40,318 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:40,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:40,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1632092484, now seen corresponding path program 2 times [2021-11-02 22:27:40,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:40,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284864387] [2021-11-02 22:27:40,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:40,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:40,330 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:27:40,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636396315] [2021-11-02 22:27:40,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:27:40,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:40,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:40,331 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:40,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:27:40,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:27:40,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:27:40,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:27:40,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 22:27:40,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:40,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284864387] [2021-11-02 22:27:40,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:27:40,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636396315] [2021-11-02 22:27:40,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636396315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:40,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:27:40,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-02 22:27:40,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824168817] [2021-11-02 22:27:40,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:27:40,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:40,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:27:40,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:27:40,564 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:40,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:40,653 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2021-11-02 22:27:40,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:27:40,654 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-02 22:27:40,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:40,654 INFO L225 Difference]: With dead ends: 93 [2021-11-02 22:27:40,654 INFO L226 Difference]: Without dead ends: 58 [2021-11-02 22:27:40,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:27:40,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-02 22:27:40,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2021-11-02 22:27:40,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:40,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2021-11-02 22:27:40,662 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 28 [2021-11-02 22:27:40,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:40,663 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2021-11-02 22:27:40,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:40,663 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2021-11-02 22:27:40,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 22:27:40,664 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:40,664 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:40,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:40,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-02 22:27:40,865 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:40,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:40,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1223950390, now seen corresponding path program 3 times [2021-11-02 22:27:40,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:40,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67465872] [2021-11-02 22:27:40,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:40,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:40,877 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:27:40,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818082743] [2021-11-02 22:27:40,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:27:40,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:40,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:40,878 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:40,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:27:40,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 22:27:40,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:27:40,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:27:40,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-02 22:27:41,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:41,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67465872] [2021-11-02 22:27:41,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:27:41,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818082743] [2021-11-02 22:27:41,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818082743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:41,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:27:41,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-11-02 22:27:41,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827627906] [2021-11-02 22:27:41,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:27:41,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:41,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:27:41,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:27:41,105 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:41,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:41,144 INFO L93 Difference]: Finished difference Result 93 states and 118 transitions. [2021-11-02 22:27:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:27:41,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 22:27:41,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:41,146 INFO L225 Difference]: With dead ends: 93 [2021-11-02 22:27:41,147 INFO L226 Difference]: Without dead ends: 58 [2021-11-02 22:27:41,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:27:41,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-02 22:27:41,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2021-11-02 22:27:41,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:41,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2021-11-02 22:27:41,157 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 32 [2021-11-02 22:27:41,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:41,158 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2021-11-02 22:27:41,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:41,158 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2021-11-02 22:27:41,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-02 22:27:41,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:41,160 INFO L513 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:41,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-02 22:27:41,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:41,386 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:41,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:41,387 INFO L85 PathProgramCache]: Analyzing trace with hash -709845727, now seen corresponding path program 4 times [2021-11-02 22:27:41,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:41,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200811298] [2021-11-02 22:27:41,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:41,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:41,398 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:27:41,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824220043] [2021-11-02 22:27:41,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:27:41,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:41,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:41,399 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:41,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:27:41,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:27:41,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:27:41,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:27:41,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-02 22:27:41,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:41,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200811298] [2021-11-02 22:27:41,800 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:27:41,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824220043] [2021-11-02 22:27:41,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824220043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:41,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:27:41,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 22:27:41,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314672928] [2021-11-02 22:27:41,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:27:41,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:41,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:27:41,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:27:41,803 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:42,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:42,010 INFO L93 Difference]: Finished difference Result 145 states and 179 transitions. [2021-11-02 22:27:42,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:27:42,012 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-02 22:27:42,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:42,014 INFO L225 Difference]: With dead ends: 145 [2021-11-02 22:27:42,014 INFO L226 Difference]: Without dead ends: 127 [2021-11-02 22:27:42,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:27:42,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-02 22:27:42,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 67. [2021-11-02 22:27:42,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 66 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:42,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2021-11-02 22:27:42,047 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 39 [2021-11-02 22:27:42,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:42,048 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2021-11-02 22:27:42,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:42,048 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2021-11-02 22:27:42,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 22:27:42,055 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:42,055 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:42,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:42,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-02 22:27:42,270 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:42,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:42,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1528313637, now seen corresponding path program 5 times [2021-11-02 22:27:42,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:42,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450466755] [2021-11-02 22:27:42,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:42,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:42,298 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:27:42,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745908450] [2021-11-02 22:27:42,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:27:42,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:42,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:42,307 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:42,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:27:43,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-02 22:27:43,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:27:43,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:27:43,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:43,507 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-02 22:27:43,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:43,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450466755] [2021-11-02 22:27:43,508 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:27:43,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745908450] [2021-11-02 22:27:43,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745908450] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:43,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:27:43,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 22:27:43,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979879135] [2021-11-02 22:27:43,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:27:43,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:43,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:27:43,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:27:43,514 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:43,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:43,604 INFO L93 Difference]: Finished difference Result 154 states and 195 transitions. [2021-11-02 22:27:43,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:27:43,605 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-02 22:27:43,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:43,606 INFO L225 Difference]: With dead ends: 154 [2021-11-02 22:27:43,607 INFO L226 Difference]: Without dead ends: 95 [2021-11-02 22:27:43,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:27:43,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-02 22:27:43,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2021-11-02 22:27:43,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.2857142857142858) internal successors, (99), 77 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:43,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2021-11-02 22:27:43,623 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 54 [2021-11-02 22:27:43,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:43,623 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2021-11-02 22:27:43,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:43,624 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2021-11-02 22:27:43,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 22:27:43,625 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:43,625 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:43,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:43,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:43,850 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:43,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:43,850 INFO L85 PathProgramCache]: Analyzing trace with hash 2036509453, now seen corresponding path program 6 times [2021-11-02 22:27:43,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:43,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291891543] [2021-11-02 22:27:43,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:43,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:43,859 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:27:43,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328017859] [2021-11-02 22:27:43,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:27:43,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:43,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:43,861 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:43,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:27:43,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-02 22:27:43,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:27:44,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:27:44,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-02 22:27:44,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:44,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291891543] [2021-11-02 22:27:44,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:27:44,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328017859] [2021-11-02 22:27:44,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328017859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:44,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:27:44,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 22:27:44,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289806492] [2021-11-02 22:27:44,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:27:44,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:44,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:27:44,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:27:44,327 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:44,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:44,423 INFO L93 Difference]: Finished difference Result 210 states and 267 transitions. [2021-11-02 22:27:44,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:27:44,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-02 22:27:44,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:44,426 INFO L225 Difference]: With dead ends: 210 [2021-11-02 22:27:44,426 INFO L226 Difference]: Without dead ends: 189 [2021-11-02 22:27:44,426 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:27:44,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-02 22:27:44,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 96. [2021-11-02 22:27:44,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2947368421052632) internal successors, (123), 95 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:44,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2021-11-02 22:27:44,438 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 62 [2021-11-02 22:27:44,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:44,438 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2021-11-02 22:27:44,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:44,439 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2021-11-02 22:27:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-02 22:27:44,440 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:44,440 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 10, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:44,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:44,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:44,654 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:44,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:44,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1722288743, now seen corresponding path program 7 times [2021-11-02 22:27:44,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:44,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212557383] [2021-11-02 22:27:44,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:44,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:44,677 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:27:44,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571005681] [2021-11-02 22:27:44,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:27:44,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:44,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:44,679 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:44,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:27:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:44,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:27:44,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 38 proven. 15 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2021-11-02 22:27:45,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:45,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212557383] [2021-11-02 22:27:45,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:27:45,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571005681] [2021-11-02 22:27:45,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571005681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:45,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:27:45,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 22:27:45,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488174418] [2021-11-02 22:27:45,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:27:45,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:45,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:27:45,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:27:45,117 INFO L87 Difference]: Start difference. First operand 96 states and 123 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:45,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:45,214 INFO L93 Difference]: Finished difference Result 218 states and 279 transitions. [2021-11-02 22:27:45,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:27:45,214 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-02 22:27:45,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:45,215 INFO L225 Difference]: With dead ends: 218 [2021-11-02 22:27:45,215 INFO L226 Difference]: Without dead ends: 131 [2021-11-02 22:27:45,216 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:27:45,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-02 22:27:45,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 110. [2021-11-02 22:27:45,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.2935779816513762) internal successors, (141), 109 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:45,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 141 transitions. [2021-11-02 22:27:45,227 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 141 transitions. Word has length 80 [2021-11-02 22:27:45,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:45,227 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 141 transitions. [2021-11-02 22:27:45,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:45,228 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 141 transitions. [2021-11-02 22:27:45,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-02 22:27:45,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:45,229 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 18, 12, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:45,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:45,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:45,450 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:45,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:45,450 INFO L85 PathProgramCache]: Analyzing trace with hash -156056031, now seen corresponding path program 8 times [2021-11-02 22:27:45,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:45,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105453854] [2021-11-02 22:27:45,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:45,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:45,476 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:27:45,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127528516] [2021-11-02 22:27:45,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:27:45,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:45,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:45,480 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:45,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:27:45,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:27:45,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:27:45,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:27:45,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2021-11-02 22:27:45,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:45,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105453854] [2021-11-02 22:27:45,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:27:45,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127528516] [2021-11-02 22:27:45,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127528516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:45,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:27:45,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-02 22:27:45,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164375118] [2021-11-02 22:27:45,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:27:45,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:45,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:27:45,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:27:45,976 INFO L87 Difference]: Start difference. First operand 110 states and 141 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:46,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:46,072 INFO L93 Difference]: Finished difference Result 247 states and 315 transitions. [2021-11-02 22:27:46,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:27:46,073 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 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 91 [2021-11-02 22:27:46,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:46,074 INFO L225 Difference]: With dead ends: 247 [2021-11-02 22:27:46,074 INFO L226 Difference]: Without dead ends: 147 [2021-11-02 22:27:46,076 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:27:46,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-02 22:27:46,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2021-11-02 22:27:46,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.2926829268292683) internal successors, (159), 123 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:46,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 159 transitions. [2021-11-02 22:27:46,089 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 159 transitions. Word has length 91 [2021-11-02 22:27:46,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:46,089 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 159 transitions. [2021-11-02 22:27:46,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:46,089 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 159 transitions. [2021-11-02 22:27:46,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-02 22:27:46,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:46,091 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 21, 14, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:46,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:46,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:46,307 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:46,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:46,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1354472153, now seen corresponding path program 9 times [2021-11-02 22:27:46,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:46,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155949788] [2021-11-02 22:27:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:46,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:46,319 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:27:46,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866381516] [2021-11-02 22:27:46,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:27:46,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:46,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:46,320 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:46,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:27:46,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 22:27:46,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:27:46,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 22:27:46,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:46,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-02 22:27:46,966 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2021-11-02 22:27:46,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:46,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155949788] [2021-11-02 22:27:46,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:27:46,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866381516] [2021-11-02 22:27:46,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866381516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:46,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:46,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:27:46,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095316837] [2021-11-02 22:27:46,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:27:46,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:46,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:27:46,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:27:46,969 INFO L87 Difference]: Start difference. First operand 124 states and 159 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:47,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:47,050 INFO L93 Difference]: Finished difference Result 239 states and 311 transitions. [2021-11-02 22:27:47,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:27:47,050 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-02 22:27:47,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:47,052 INFO L225 Difference]: With dead ends: 239 [2021-11-02 22:27:47,052 INFO L226 Difference]: Without dead ends: 142 [2021-11-02 22:27:47,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:27:47,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-02 22:27:47,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 124. [2021-11-02 22:27:47,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.2845528455284554) internal successors, (158), 123 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:47,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2021-11-02 22:27:47,065 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 102 [2021-11-02 22:27:47,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:47,065 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2021-11-02 22:27:47,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:47,066 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2021-11-02 22:27:47,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-02 22:27:47,067 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:47,067 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 20, 14, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:47,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:47,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 22:27:47,287 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:47,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:47,288 INFO L85 PathProgramCache]: Analyzing trace with hash 863158245, now seen corresponding path program 1 times [2021-11-02 22:27:47,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:47,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767699633] [2021-11-02 22:27:47,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:47,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:47,299 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:27:47,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502717095] [2021-11-02 22:27:47,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:47,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:47,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:47,300 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:47,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:27:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:47,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:27:47,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 66 proven. 28 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2021-11-02 22:27:47,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:47,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767699633] [2021-11-02 22:27:47,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:27:47,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502717095] [2021-11-02 22:27:47,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502717095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:47,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:27:47,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 22:27:47,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7421227] [2021-11-02 22:27:47,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:27:47,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:47,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:27:47,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:27:47,845 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:47,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:47,979 INFO L93 Difference]: Finished difference Result 276 states and 349 transitions. [2021-11-02 22:27:47,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:27:47,980 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-02 22:27:47,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:47,981 INFO L225 Difference]: With dead ends: 276 [2021-11-02 22:27:47,981 INFO L226 Difference]: Without dead ends: 163 [2021-11-02 22:27:47,982 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:27:47,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-02 22:27:47,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 138. [2021-11-02 22:27:47,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.2846715328467153) internal successors, (176), 137 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:47,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 176 transitions. [2021-11-02 22:27:47,995 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 176 transitions. Word has length 102 [2021-11-02 22:27:47,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:47,996 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 176 transitions. [2021-11-02 22:27:47,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:47,996 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 176 transitions. [2021-11-02 22:27:47,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-02 22:27:47,997 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:47,998 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 23, 16, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:48,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:48,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-02 22:27:48,210 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:48,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:48,211 INFO L85 PathProgramCache]: Analyzing trace with hash 565445987, now seen corresponding path program 2 times [2021-11-02 22:27:48,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:48,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436952756] [2021-11-02 22:27:48,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:48,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:48,232 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:27:48,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122282982] [2021-11-02 22:27:48,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:27:48,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:48,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:48,234 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:48,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 22:27:48,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:27:48,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:27:48,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 22:27:48,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:48,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 83 proven. 36 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2021-11-02 22:27:48,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:48,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436952756] [2021-11-02 22:27:48,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:27:48,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122282982] [2021-11-02 22:27:48,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122282982] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:48,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:27:48,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-02 22:27:48,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660993099] [2021-11-02 22:27:48,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:27:48,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:48,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:27:48,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:27:48,923 INFO L87 Difference]: Start difference. First operand 138 states and 176 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:49,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:49,072 INFO L93 Difference]: Finished difference Result 305 states and 385 transitions. [2021-11-02 22:27:49,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:27:49,072 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-02 22:27:49,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:49,074 INFO L225 Difference]: With dead ends: 305 [2021-11-02 22:27:49,074 INFO L226 Difference]: Without dead ends: 179 [2021-11-02 22:27:49,076 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:27:49,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-02 22:27:49,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 152. [2021-11-02 22:27:49,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.2847682119205297) internal successors, (194), 151 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:49,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 194 transitions. [2021-11-02 22:27:49,091 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 194 transitions. Word has length 113 [2021-11-02 22:27:49,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:49,092 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 194 transitions. [2021-11-02 22:27:49,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:49,092 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 194 transitions. [2021-11-02 22:27:49,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-02 22:27:49,093 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:49,093 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 26, 18, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:49,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:49,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 22:27:49,306 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:49,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:49,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1542088923, now seen corresponding path program 3 times [2021-11-02 22:27:49,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:49,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977702365] [2021-11-02 22:27:49,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:49,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:49,318 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:27:49,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919585675] [2021-11-02 22:27:49,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:27:49,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:49,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:49,322 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:49,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 22:27:50,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-02 22:27:50,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:27:50,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:27:50,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:50,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1340 backedges. 103 proven. 45 refuted. 0 times theorem prover too weak. 1192 trivial. 0 not checked. [2021-11-02 22:27:50,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:50,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977702365] [2021-11-02 22:27:50,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:27:50,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919585675] [2021-11-02 22:27:50,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919585675] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:50,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:27:50,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-02 22:27:50,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832799967] [2021-11-02 22:27:50,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:27:50,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:50,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:27:50,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:27:50,944 INFO L87 Difference]: Start difference. First operand 152 states and 194 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:51,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:51,097 INFO L93 Difference]: Finished difference Result 334 states and 421 transitions. [2021-11-02 22:27:51,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:27:51,097 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-02 22:27:51,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:51,099 INFO L225 Difference]: With dead ends: 334 [2021-11-02 22:27:51,099 INFO L226 Difference]: Without dead ends: 195 [2021-11-02 22:27:51,100 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:27:51,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-02 22:27:51,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 166. [2021-11-02 22:27:51,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.284848484848485) internal successors, (212), 165 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:51,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 212 transitions. [2021-11-02 22:27:51,114 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 212 transitions. Word has length 124 [2021-11-02 22:27:51,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:51,115 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 212 transitions. [2021-11-02 22:27:51,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:51,115 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 212 transitions. [2021-11-02 22:27:51,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-02 22:27:51,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:51,117 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 29, 20, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:51,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:51,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:51,342 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:51,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:51,342 INFO L85 PathProgramCache]: Analyzing trace with hash 855801123, now seen corresponding path program 4 times [2021-11-02 22:27:51,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:51,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367567736] [2021-11-02 22:27:51,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:51,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:51,356 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:27:51,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063617445] [2021-11-02 22:27:51,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:27:51,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:51,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:51,357 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:51,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 22:27:51,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:27:51,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:27:51,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:27:51,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1642 backedges. 117 proven. 1000 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2021-11-02 22:27:52,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:52,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367567736] [2021-11-02 22:27:52,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:27:52,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063617445] [2021-11-02 22:27:52,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063617445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:52,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:27:52,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-02 22:27:52,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659698169] [2021-11-02 22:27:52,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:27:52,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:52,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:27:52,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:27:52,560 INFO L87 Difference]: Start difference. First operand 166 states and 212 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:52,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:52,974 INFO L93 Difference]: Finished difference Result 494 states and 617 transitions. [2021-11-02 22:27:52,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 22:27:52,975 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-11-02 22:27:52,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:52,980 INFO L225 Difference]: With dead ends: 494 [2021-11-02 22:27:52,981 INFO L226 Difference]: Without dead ends: 458 [2021-11-02 22:27:52,982 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2021-11-02 22:27:52,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-02 22:27:52,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 199. [2021-11-02 22:27:52,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.292929292929293) internal successors, (256), 198 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:53,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 256 transitions. [2021-11-02 22:27:53,000 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 256 transitions. Word has length 135 [2021-11-02 22:27:53,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:53,001 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 256 transitions. [2021-11-02 22:27:53,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:53,002 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 256 transitions. [2021-11-02 22:27:53,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-02 22:27:53,004 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:53,004 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 39, 20, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:53,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:53,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:53,222 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:53,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:53,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1609734887, now seen corresponding path program 5 times [2021-11-02 22:27:53,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:53,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156046812] [2021-11-02 22:27:53,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:53,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:53,242 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:27:53,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317405884] [2021-11-02 22:27:53,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:27:53,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:53,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:53,244 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:53,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 22:28:14,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 44 check-sat command(s) [2021-11-02 22:28:14,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:28:14,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 22:28:14,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:15,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2757 backedges. 1614 proven. 145 refuted. 0 times theorem prover too weak. 998 trivial. 0 not checked. [2021-11-02 22:28:15,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:15,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156046812] [2021-11-02 22:28:15,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:28:15,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317405884] [2021-11-02 22:28:15,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317405884] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:15,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:28:15,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-02 22:28:15,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564722662] [2021-11-02 22:28:15,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:28:15,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:15,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:28:15,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:28:15,058 INFO L87 Difference]: Start difference. First operand 199 states and 256 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:15,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:15,208 INFO L93 Difference]: Finished difference Result 434 states and 553 transitions. [2021-11-02 22:28:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:28:15,208 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-11-02 22:28:15,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:15,210 INFO L225 Difference]: With dead ends: 434 [2021-11-02 22:28:15,211 INFO L226 Difference]: Without dead ends: 249 [2021-11-02 22:28:15,211 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:28:15,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-02 22:28:15,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 216. [2021-11-02 22:28:15,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.2930232558139534) internal successors, (278), 215 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 278 transitions. [2021-11-02 22:28:15,229 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 278 transitions. Word has length 168 [2021-11-02 22:28:15,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:15,230 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 278 transitions. [2021-11-02 22:28:15,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:15,230 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 278 transitions. [2021-11-02 22:28:15,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-02 22:28:15,232 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:15,233 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 43, 22, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:15,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:15,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 22:28:15,433 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:28:15,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:15,434 INFO L85 PathProgramCache]: Analyzing trace with hash -798328129, now seen corresponding path program 6 times [2021-11-02 22:28:15,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:15,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274713548] [2021-11-02 22:28:15,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:15,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:15,462 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:28:15,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353300032] [2021-11-02 22:28:15,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:28:15,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:15,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:28:15,467 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:28:15,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 22:28:18,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-11-02 22:28:18,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:28:18,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:28:18,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3316 backedges. 1939 proven. 176 refuted. 0 times theorem prover too weak. 1201 trivial. 0 not checked. [2021-11-02 22:28:19,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:19,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274713548] [2021-11-02 22:28:19,327 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:28:19,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353300032] [2021-11-02 22:28:19,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353300032] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:19,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:28:19,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-02 22:28:19,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192122406] [2021-11-02 22:28:19,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:28:19,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:19,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:28:19,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:28:19,330 INFO L87 Difference]: Start difference. First operand 216 states and 278 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:19,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:19,492 INFO L93 Difference]: Finished difference Result 469 states and 597 transitions. [2021-11-02 22:28:19,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:28:19,493 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2021-11-02 22:28:19,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:19,495 INFO L225 Difference]: With dead ends: 469 [2021-11-02 22:28:19,495 INFO L226 Difference]: Without dead ends: 268 [2021-11-02 22:28:19,496 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:28:19,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-02 22:28:19,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 233. [2021-11-02 22:28:19,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.293103448275862) internal successors, (300), 232 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:19,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 300 transitions. [2021-11-02 22:28:19,521 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 300 transitions. Word has length 182 [2021-11-02 22:28:19,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:19,522 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 300 transitions. [2021-11-02 22:28:19,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:19,522 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 300 transitions. [2021-11-02 22:28:19,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-02 22:28:19,524 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:19,525 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 47, 24, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:19,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:19,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:19,738 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:28:19,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:19,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1220551975, now seen corresponding path program 7 times [2021-11-02 22:28:19,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:19,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447876924] [2021-11-02 22:28:19,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:19,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:19,758 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:28:19,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423054181] [2021-11-02 22:28:19,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:28:19,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:19,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:28:19,760 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:28:19,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 22:28:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:20,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 22:28:20,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 171 proven. 78 refuted. 0 times theorem prover too weak. 3678 trivial. 0 not checked. [2021-11-02 22:28:20,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:20,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447876924] [2021-11-02 22:28:20,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:28:20,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423054181] [2021-11-02 22:28:20,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423054181] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:20,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:28:20,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-02 22:28:20,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243751552] [2021-11-02 22:28:20,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:28:20,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:20,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:28:20,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:28:20,917 INFO L87 Difference]: Start difference. First operand 233 states and 300 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:21,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:21,085 INFO L93 Difference]: Finished difference Result 504 states and 641 transitions. [2021-11-02 22:28:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:28:21,086 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2021-11-02 22:28:21,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:21,088 INFO L225 Difference]: With dead ends: 504 [2021-11-02 22:28:21,088 INFO L226 Difference]: Without dead ends: 287 [2021-11-02 22:28:21,089 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:28:21,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-02 22:28:21,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 250. [2021-11-02 22:28:21,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.2931726907630523) internal successors, (322), 249 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:21,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 322 transitions. [2021-11-02 22:28:21,115 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 322 transitions. Word has length 196 [2021-11-02 22:28:21,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:21,115 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 322 transitions. [2021-11-02 22:28:21,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:21,116 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 322 transitions. [2021-11-02 22:28:21,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-02 22:28:21,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:21,119 INFO L513 BasicCegarLoop]: trace histogram [52, 52, 51, 26, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:21,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:21,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-02 22:28:21,334 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:28:21,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:21,334 INFO L85 PathProgramCache]: Analyzing trace with hash -907943169, now seen corresponding path program 8 times [2021-11-02 22:28:21,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:21,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566895513] [2021-11-02 22:28:21,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:21,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:21,352 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:28:21,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267485808] [2021-11-02 22:28:21,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:28:21,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:21,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:28:21,378 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:28:21,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 22:28:21,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:28:21,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:28:21,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:28:21,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:22,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4590 backedges. 198 proven. 91 refuted. 0 times theorem prover too weak. 4301 trivial. 0 not checked. [2021-11-02 22:28:22,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:22,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566895513] [2021-11-02 22:28:22,564 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:28:22,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267485808] [2021-11-02 22:28:22,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267485808] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:22,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:28:22,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-02 22:28:22,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085534177] [2021-11-02 22:28:22,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:28:22,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:22,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:28:22,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:28:22,567 INFO L87 Difference]: Start difference. First operand 250 states and 322 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:22,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:22,771 INFO L93 Difference]: Finished difference Result 539 states and 685 transitions. [2021-11-02 22:28:22,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:28:22,772 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2021-11-02 22:28:22,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:22,774 INFO L225 Difference]: With dead ends: 539 [2021-11-02 22:28:22,774 INFO L226 Difference]: Without dead ends: 306 [2021-11-02 22:28:22,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:28:22,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-02 22:28:22,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 267. [2021-11-02 22:28:22,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.2932330827067668) internal successors, (344), 266 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:22,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 344 transitions. [2021-11-02 22:28:22,800 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 344 transitions. Word has length 210 [2021-11-02 22:28:22,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:22,801 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 344 transitions. [2021-11-02 22:28:22,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:22,801 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 344 transitions. [2021-11-02 22:28:22,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-02 22:28:22,804 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:22,804 INFO L513 BasicCegarLoop]: trace histogram [56, 56, 55, 28, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:22,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:23,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-02 22:28:23,018 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:28:23,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:23,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1453301913, now seen corresponding path program 9 times [2021-11-02 22:28:23,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:23,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234523123] [2021-11-02 22:28:23,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:23,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:23,031 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:28:23,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981869724] [2021-11-02 22:28:23,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:28:23,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:23,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:28:23,041 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:28:23,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 22:28:37,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-11-02 22:28:37,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:28:37,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 22:28:37,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5305 backedges. 228 proven. 105 refuted. 0 times theorem prover too weak. 4972 trivial. 0 not checked. [2021-11-02 22:28:38,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:38,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234523123] [2021-11-02 22:28:38,379 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:28:38,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981869724] [2021-11-02 22:28:38,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981869724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:38,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:28:38,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-02 22:28:38,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668031610] [2021-11-02 22:28:38,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:28:38,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:38,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:28:38,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:28:38,381 INFO L87 Difference]: Start difference. First operand 267 states and 344 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:38,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:38,606 INFO L93 Difference]: Finished difference Result 574 states and 729 transitions. [2021-11-02 22:28:38,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:28:38,606 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2021-11-02 22:28:38,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:38,608 INFO L225 Difference]: With dead ends: 574 [2021-11-02 22:28:38,608 INFO L226 Difference]: Without dead ends: 325 [2021-11-02 22:28:38,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:28:38,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-02 22:28:38,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 284. [2021-11-02 22:28:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.2932862190812722) internal successors, (366), 283 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 366 transitions. [2021-11-02 22:28:38,637 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 366 transitions. Word has length 224 [2021-11-02 22:28:38,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:38,638 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 366 transitions. [2021-11-02 22:28:38,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:38,638 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 366 transitions. [2021-11-02 22:28:38,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-02 22:28:38,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:38,640 INFO L513 BasicCegarLoop]: trace histogram [60, 60, 59, 30, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:38,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:38,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-02 22:28:38,857 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:28:38,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:38,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1040579391, now seen corresponding path program 10 times [2021-11-02 22:28:38,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:38,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583456634] [2021-11-02 22:28:38,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:38,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:38,897 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:28:38,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152744061] [2021-11-02 22:28:38,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:28:38,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:38,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:28:38,898 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:28:38,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 22:28:39,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:28:39,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:28:39,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 22:28:39,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6072 backedges. 287 proven. 4295 refuted. 0 times theorem prover too weak. 1490 trivial. 0 not checked. [2021-11-02 22:28:40,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:40,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583456634] [2021-11-02 22:28:40,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:28:40,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152744061] [2021-11-02 22:28:40,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152744061] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:40,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:28:40,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-02 22:28:40,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388997200] [2021-11-02 22:28:40,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 22:28:40,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:40,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 22:28:40,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:28:40,944 INFO L87 Difference]: Start difference. First operand 284 states and 366 transitions. Second operand has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:41,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:41,504 INFO L93 Difference]: Finished difference Result 826 states and 1037 transitions. [2021-11-02 22:28:41,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 22:28:41,504 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-11-02 22:28:41,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:41,508 INFO L225 Difference]: With dead ends: 826 [2021-11-02 22:28:41,508 INFO L226 Difference]: Without dead ends: 775 [2021-11-02 22:28:41,509 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=519, Invalid=887, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 22:28:41,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-11-02 22:28:41,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 332. [2021-11-02 22:28:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.299093655589124) internal successors, (430), 331 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:41,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 430 transitions. [2021-11-02 22:28:41,547 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 430 transitions. Word has length 238 [2021-11-02 22:28:41,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:41,548 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 430 transitions. [2021-11-02 22:28:41,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:41,548 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 430 transitions. [2021-11-02 22:28:41,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-11-02 22:28:41,550 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:41,550 INFO L513 BasicCegarLoop]: trace histogram [75, 75, 74, 30, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:41,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:41,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-02 22:28:41,778 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:28:41,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:41,778 INFO L85 PathProgramCache]: Analyzing trace with hash -277602919, now seen corresponding path program 11 times [2021-11-02 22:28:41,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:41,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62475542] [2021-11-02 22:28:41,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:41,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:41,792 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:28:41,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501829046] [2021-11-02 22:28:41,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:28:41,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:41,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:28:41,794 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:28:41,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 22:33:41,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2021-11-02 22:33:41,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:33:41,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 22:33:41,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:33:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9235 backedges. 4954 proven. 330 refuted. 0 times theorem prover too weak. 3951 trivial. 0 not checked. [2021-11-02 22:33:42,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:33:42,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62475542] [2021-11-02 22:33:42,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:33:42,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501829046] [2021-11-02 22:33:42,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501829046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:33:42,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:33:42,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-02 22:33:42,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658802508] [2021-11-02 22:33:42,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:33:42,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:33:42,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:33:42,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:33:42,919 INFO L87 Difference]: Start difference. First operand 332 states and 430 transitions. Second operand has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:33:43,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:33:43,172 INFO L93 Difference]: Finished difference Result 710 states and 909 transitions. [2021-11-02 22:33:43,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 22:33:43,173 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 286 [2021-11-02 22:33:43,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:33:43,176 INFO L225 Difference]: With dead ends: 710 [2021-11-02 22:33:43,176 INFO L226 Difference]: Without dead ends: 397 [2021-11-02 22:33:43,180 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:33:43,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-11-02 22:33:43,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 352. [2021-11-02 22:33:43,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.2991452991452992) internal successors, (456), 351 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:33:43,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 456 transitions. [2021-11-02 22:33:43,218 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 456 transitions. Word has length 286 [2021-11-02 22:33:43,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:33:43,218 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 456 transitions. [2021-11-02 22:33:43,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:33:43,219 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 456 transitions. [2021-11-02 22:33:43,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-11-02 22:33:43,221 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:33:43,221 INFO L513 BasicCegarLoop]: trace histogram [80, 80, 79, 32, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:33:43,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 22:33:43,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:33:43,434 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:33:43,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:33:43,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1777843363, now seen corresponding path program 12 times [2021-11-02 22:33:43,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:33:43,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630178855] [2021-11-02 22:33:43,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:43,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:33:43,461 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:33:43,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199572453] [2021-11-02 22:33:43,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:33:43,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:33:43,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:33:43,463 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:33:43,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 22:34:09,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2021-11-02 22:34:09,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:34:09,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:34:09,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:34:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10480 backedges. 5619 proven. 376 refuted. 0 times theorem prover too weak. 4485 trivial. 0 not checked. [2021-11-02 22:34:10,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:34:10,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630178855] [2021-11-02 22:34:10,922 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:34:10,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199572453] [2021-11-02 22:34:10,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199572453] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:34:10,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:34:10,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-02 22:34:10,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419502189] [2021-11-02 22:34:10,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 22:34:10,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:34:10,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 22:34:10,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:34:10,924 INFO L87 Difference]: Start difference. First operand 352 states and 456 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:34:11,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:34:11,139 INFO L93 Difference]: Finished difference Result 751 states and 961 transitions. [2021-11-02 22:34:11,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 22:34:11,139 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 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 303 [2021-11-02 22:34:11,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:34:11,141 INFO L225 Difference]: With dead ends: 751 [2021-11-02 22:34:11,142 INFO L226 Difference]: Without dead ends: 419 [2021-11-02 22:34:11,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:34:11,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-11-02 22:34:11,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 372. [2021-11-02 22:34:11,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 1.2991913746630728) internal successors, (482), 371 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:34:11,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 482 transitions. [2021-11-02 22:34:11,189 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 482 transitions. Word has length 303 [2021-11-02 22:34:11,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:34:11,189 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 482 transitions. [2021-11-02 22:34:11,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:34:11,190 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 482 transitions. [2021-11-02 22:34:11,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-02 22:34:11,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:34:11,193 INFO L513 BasicCegarLoop]: trace histogram [85, 85, 84, 34, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:34:11,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 22:34:11,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 22:34:11,411 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:34:11,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:34:11,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1689922393, now seen corresponding path program 13 times [2021-11-02 22:34:11,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:34:11,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249539046] [2021-11-02 22:34:11,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:34:11,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:34:11,459 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:34:11,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903527287] [2021-11-02 22:34:11,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:34:11,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:34:11,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:34:11,460 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:34:11,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 22:34:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:34:12,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:34:12,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:34:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11804 backedges. 326 proven. 153 refuted. 0 times theorem prover too weak. 11325 trivial. 0 not checked. [2021-11-02 22:34:13,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:34:13,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249539046] [2021-11-02 22:34:13,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:34:13,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903527287] [2021-11-02 22:34:13,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903527287] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:34:13,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:34:13,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-02 22:34:13,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525144036] [2021-11-02 22:34:13,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 22:34:13,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:34:13,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 22:34:13,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:34:13,498 INFO L87 Difference]: Start difference. First operand 372 states and 482 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:34:13,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:34:13,739 INFO L93 Difference]: Finished difference Result 792 states and 1013 transitions. [2021-11-02 22:34:13,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 22:34:13,739 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 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 320 [2021-11-02 22:34:13,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:34:13,742 INFO L225 Difference]: With dead ends: 792 [2021-11-02 22:34:13,742 INFO L226 Difference]: Without dead ends: 441 [2021-11-02 22:34:13,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:34:13,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-11-02 22:34:13,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 392. [2021-11-02 22:34:13,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 1.29923273657289) internal successors, (508), 391 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:34:13,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 508 transitions. [2021-11-02 22:34:13,778 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 508 transitions. Word has length 320 [2021-11-02 22:34:13,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:34:13,778 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 508 transitions. [2021-11-02 22:34:13,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:34:13,779 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 508 transitions. [2021-11-02 22:34:13,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2021-11-02 22:34:13,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:34:13,781 INFO L513 BasicCegarLoop]: trace histogram [90, 90, 89, 36, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:34:13,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 22:34:13,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:34:13,994 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:34:13,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:34:13,994 INFO L85 PathProgramCache]: Analyzing trace with hash 522671331, now seen corresponding path program 14 times [2021-11-02 22:34:13,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:34:13,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034446031] [2021-11-02 22:34:13,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:34:13,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:34:14,028 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:34:14,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537377790] [2021-11-02 22:34:14,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:34:14,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:34:14,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:34:14,030 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:34:14,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 22:34:15,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:34:15,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:34:15,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 22:34:15,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:34:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13207 backedges. 363 proven. 171 refuted. 0 times theorem prover too weak. 12673 trivial. 0 not checked. [2021-11-02 22:34:16,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:34:16,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034446031] [2021-11-02 22:34:16,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:34:16,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537377790] [2021-11-02 22:34:16,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537377790] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:34:16,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:34:16,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-02 22:34:16,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517650049] [2021-11-02 22:34:16,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:34:16,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:34:16,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:34:16,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:34:16,094 INFO L87 Difference]: Start difference. First operand 392 states and 508 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:34:16,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:34:16,413 INFO L93 Difference]: Finished difference Result 833 states and 1065 transitions. [2021-11-02 22:34:16,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:34:16,414 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 337 [2021-11-02 22:34:16,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:34:16,415 INFO L225 Difference]: With dead ends: 833 [2021-11-02 22:34:16,415 INFO L226 Difference]: Without dead ends: 463 [2021-11-02 22:34:16,416 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:34:16,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-11-02 22:34:16,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 412. [2021-11-02 22:34:16,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.2992700729927007) internal successors, (534), 411 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:34:16,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 534 transitions. [2021-11-02 22:34:16,455 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 534 transitions. Word has length 337 [2021-11-02 22:34:16,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:34:16,455 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 534 transitions. [2021-11-02 22:34:16,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:34:16,456 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 534 transitions. [2021-11-02 22:34:16,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2021-11-02 22:34:16,458 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:34:16,459 INFO L513 BasicCegarLoop]: trace histogram [95, 95, 94, 38, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:34:16,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 22:34:16,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 22:34:16,674 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:34:16,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:34:16,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2017957607, now seen corresponding path program 15 times [2021-11-02 22:34:16,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:34:16,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317043959] [2021-11-02 22:34:16,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:34:16,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:34:16,715 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:34:16,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066872152] [2021-11-02 22:34:16,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:34:16,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:34:16,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:34:16,717 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:34:16,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 22:34:58,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-02 22:34:58,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:34:58,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 22:34:58,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:34:59,464 INFO L134 CoverageAnalysis]: Checked inductivity of 14689 backedges. 403 proven. 190 refuted. 0 times theorem prover too weak. 14096 trivial. 0 not checked. [2021-11-02 22:34:59,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:34:59,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317043959] [2021-11-02 22:34:59,464 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:34:59,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066872152] [2021-11-02 22:34:59,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066872152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:34:59,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:34:59,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-02 22:34:59,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752533817] [2021-11-02 22:34:59,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 22:34:59,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:34:59,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 22:34:59,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:34:59,468 INFO L87 Difference]: Start difference. First operand 412 states and 534 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:34:59,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:34:59,769 INFO L93 Difference]: Finished difference Result 874 states and 1117 transitions. [2021-11-02 22:34:59,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:34:59,770 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 354 [2021-11-02 22:34:59,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:34:59,773 INFO L225 Difference]: With dead ends: 874 [2021-11-02 22:34:59,773 INFO L226 Difference]: Without dead ends: 485 [2021-11-02 22:34:59,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:34:59,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-11-02 22:34:59,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 432. [2021-11-02 22:34:59,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.2993039443155452) internal successors, (560), 431 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:34:59,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 560 transitions. [2021-11-02 22:34:59,821 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 560 transitions. Word has length 354 [2021-11-02 22:34:59,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:34:59,822 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 560 transitions. [2021-11-02 22:34:59,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:34:59,822 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 560 transitions. [2021-11-02 22:34:59,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2021-11-02 22:34:59,825 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:34:59,826 INFO L513 BasicCegarLoop]: trace histogram [100, 100, 99, 40, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:34:59,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:00,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-02 22:35:00,042 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:35:00,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:00,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1404157219, now seen corresponding path program 16 times [2021-11-02 22:35:00,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:35:00,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261469856] [2021-11-02 22:35:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:00,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:35:00,064 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:35:00,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850538843] [2021-11-02 22:35:00,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:35:00,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:35:00,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:35:00,068 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:35:00,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 22:35:01,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:35:01,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:35:01,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 22:35:01,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16250 backedges. 532 proven. 12493 refuted. 0 times theorem prover too weak. 3225 trivial. 0 not checked. [2021-11-02 22:35:04,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:35:04,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261469856] [2021-11-02 22:35:04,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:35:04,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850538843] [2021-11-02 22:35:04,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850538843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:35:04,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:35:04,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-02 22:35:04,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905372892] [2021-11-02 22:35:04,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 22:35:04,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:35:04,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 22:35:04,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=531, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:35:04,426 INFO L87 Difference]: Start difference. First operand 432 states and 560 transitions. Second operand has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 29 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:05,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:05,371 INFO L93 Difference]: Finished difference Result 1228 states and 1547 transitions. [2021-11-02 22:35:05,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-02 22:35:05,372 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 29 states have internal predecessors, (101), 0 states have call successors, (0), 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 371 [2021-11-02 22:35:05,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:05,378 INFO L225 Difference]: With dead ends: 1228 [2021-11-02 22:35:05,379 INFO L226 Difference]: Without dead ends: 1162 [2021-11-02 22:35:05,380 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=1491, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 22:35:05,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-11-02 22:35:05,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 495. [2021-11-02 22:35:05,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.3036437246963564) internal successors, (644), 494 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:05,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 644 transitions. [2021-11-02 22:35:05,432 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 644 transitions. Word has length 371 [2021-11-02 22:35:05,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:05,432 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 644 transitions. [2021-11-02 22:35:05,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 29 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:05,433 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 644 transitions. [2021-11-02 22:35:05,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-11-02 22:35:05,436 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:05,436 INFO L513 BasicCegarLoop]: trace histogram [120, 120, 119, 40, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:05,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:05,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 22:35:05,662 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:35:05,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:05,662 INFO L85 PathProgramCache]: Analyzing trace with hash -719286119, now seen corresponding path program 17 times [2021-11-02 22:35:05,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:35:05,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123580511] [2021-11-02 22:35:05,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:05,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:35:05,684 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:35:05,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195177738] [2021-11-02 22:35:05,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:35:05,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:35:05,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:35:05,688 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:35:05,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 22:40:44,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 105 check-sat command(s) [2021-11-02 22:40:44,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:40:44,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 1318 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 22:40:44,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 23056 backedges. 11184 proven. 590 refuted. 0 times theorem prover too weak. 11282 trivial. 0 not checked. [2021-11-02 22:40:46,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:46,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123580511] [2021-11-02 22:40:46,615 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:40:46,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195177738] [2021-11-02 22:40:46,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195177738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:46,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:40:46,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-02 22:40:46,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281809389] [2021-11-02 22:40:46,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 22:40:46,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:46,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 22:40:46,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:40:46,619 INFO L87 Difference]: Start difference. First operand 495 states and 644 transitions. Second operand has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 24 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:46,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:46,960 INFO L93 Difference]: Finished difference Result 1046 states and 1345 transitions. [2021-11-02 22:40:46,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 22:40:46,961 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 24 states have internal predecessors, (89), 0 states have call successors, (0), 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 434 [2021-11-02 22:40:46,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:46,965 INFO L225 Difference]: With dead ends: 1046 [2021-11-02 22:40:46,965 INFO L226 Difference]: Without dead ends: 575 [2021-11-02 22:40:46,967 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:40:46,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-11-02 22:40:47,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 518. [2021-11-02 22:40:47,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 1.3036750483558994) internal successors, (674), 517 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:47,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 674 transitions. [2021-11-02 22:40:47,024 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 674 transitions. Word has length 434 [2021-11-02 22:40:47,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:47,024 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 674 transitions. [2021-11-02 22:40:47,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 24 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:47,025 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 674 transitions. [2021-11-02 22:40:47,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2021-11-02 22:40:47,053 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:47,054 INFO L513 BasicCegarLoop]: trace histogram [126, 126, 125, 42, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:47,254 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forcibly destroying the process [2021-11-02 22:40:47,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-02 22:40:47,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:47,267 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:47,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:47,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1309551411, now seen corresponding path program 18 times [2021-11-02 22:40:47,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:47,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131292654] [2021-11-02 22:40:47,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:47,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:47,293 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:40:47,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628224972] [2021-11-02 22:40:47,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:40:47,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:47,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:40:47,294 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:40:47,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae481ca8-ed4d-4472-b5f6-3cf01766382e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process