./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y --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 e3523bc8254ad35e64aad06fd6e3c84672a9aa19521e18482795d6584edb45d0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:48:04,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:48:04,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:48:04,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:48:04,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:48:04,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:48:04,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:48:04,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:48:04,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:48:04,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:48:04,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:48:04,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:48:04,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:48:04,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:48:04,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:48:04,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:48:04,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:48:04,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:48:04,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:48:04,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:48:04,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:48:04,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:48:04,943 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:48:04,944 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:48:04,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:48:04,950 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:48:04,950 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:48:04,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:48:04,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:48:04,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:48:04,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:48:04,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:48:04,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:48:04,970 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:48:04,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:48:04,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:48:04,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:48:04,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:48:04,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:48:04,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:48:04,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:48:04,977 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 17:48:05,033 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:48:05,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:48:05,034 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:48:05,034 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:48:05,035 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:48:05,035 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:48:05,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:48:05,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:48:05,037 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:48:05,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:48:05,046 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:48:05,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:48:05,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:48:05,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:48:05,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:48:05,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:48:05,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:48:05,047 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:48:05,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:48:05,048 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:48:05,048 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:48:05,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:48:05,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:48:05,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:48:05,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:48:05,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:48:05,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:48:05,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:48:05,050 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:48:05,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:48:05,051 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:48:05,051 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:48:05,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:48:05,052 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:48:05,052 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_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3523bc8254ad35e64aad06fd6e3c84672a9aa19521e18482795d6584edb45d0 [2021-11-13 17:48:05,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:48:05,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:48:05,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:48:05,446 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:48:05,447 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:48:05,448 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c [2021-11-13 17:48:05,517 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/data/0c278875d/6a8f8b1385274cf69455b10e7141e9a3/FLAG700ff4578 [2021-11-13 17:48:05,970 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:48:05,971 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c [2021-11-13 17:48:05,978 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/data/0c278875d/6a8f8b1385274cf69455b10e7141e9a3/FLAG700ff4578 [2021-11-13 17:48:06,348 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/data/0c278875d/6a8f8b1385274cf69455b10e7141e9a3 [2021-11-13 17:48:06,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:48:06,353 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:48:06,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:48:06,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:48:06,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:48:06,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:48:06" (1/1) ... [2021-11-13 17:48:06,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48d353a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:48:06, skipping insertion in model container [2021-11-13 17:48:06,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:48:06" (1/1) ... [2021-11-13 17:48:06,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:48:06,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:48:06,606 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_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c[538,551] [2021-11-13 17:48:06,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:48:06,635 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:48:06,649 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_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c[538,551] [2021-11-13 17:48:06,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:48:06,674 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:48:06,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:48:06 WrapperNode [2021-11-13 17:48:06,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:48:06,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:48:06,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:48:06,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:48:06,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:48:06" (1/1) ... [2021-11-13 17:48:06,696 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:48:06" (1/1) ... [2021-11-13 17:48:06,719 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:48:06,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:48:06,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:48:06,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:48:06,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:48:06" (1/1) ... [2021-11-13 17:48:06,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:48:06" (1/1) ... [2021-11-13 17:48:06,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:48:06" (1/1) ... [2021-11-13 17:48:06,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:48:06" (1/1) ... [2021-11-13 17:48:06,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:48:06" (1/1) ... [2021-11-13 17:48:06,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:48:06" (1/1) ... [2021-11-13 17:48:06,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:48:06" (1/1) ... [2021-11-13 17:48:06,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:48:06,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:48:06,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:48:06,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:48:06,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:48:06" (1/1) ... [2021-11-13 17:48:06,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:48:06,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:06,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:48:06,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:48:06,871 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 17:48:06,872 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 17:48:06,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:48:06,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:48:06,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:48:06,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:48:06,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 17:48:06,873 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 17:48:07,209 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:48:07,210 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 17:48:07,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:48:07 BoogieIcfgContainer [2021-11-13 17:48:07,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:48:07,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:48:07,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:48:07,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:48:07,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:48:06" (1/3) ... [2021-11-13 17:48:07,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f171a88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:48:07, skipping insertion in model container [2021-11-13 17:48:07,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:48:06" (2/3) ... [2021-11-13 17:48:07,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f171a88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:48:07, skipping insertion in model container [2021-11-13 17:48:07,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:48:07" (3/3) ... [2021-11-13 17:48:07,241 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound100.c [2021-11-13 17:48:07,247 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:48:07,247 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:48:07,303 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:48:07,312 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 [2021-11-13 17:48:07,312 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:48:07,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 17:48:07,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-13 17:48:07,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:07,340 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:07,341 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:07,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:07,348 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2021-11-13 17:48:07,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:07,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940141671] [2021-11-13 17:48:07,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:07,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:07,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:07,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:07,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:48:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:07,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:48:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 17:48:07,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:07,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940141671] [2021-11-13 17:48:07,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940141671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:07,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:07,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 17:48:07,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173123710] [2021-11-13 17:48:07,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:07,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 17:48:07,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:07,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 17:48:07,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 17:48:07,621 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 17:48:07,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:07,649 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2021-11-13 17:48:07,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 17:48:07,652 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-11-13 17:48:07,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:07,661 INFO L225 Difference]: With dead ends: 63 [2021-11-13 17:48:07,661 INFO L226 Difference]: Without dead ends: 29 [2021-11-13 17:48:07,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 17:48:07,669 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.27ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:07,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 1.27ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 17:48:07,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-13 17:48:07,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-13 17:48:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 17:48:07,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-11-13 17:48:07,719 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2021-11-13 17:48:07,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:07,720 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-11-13 17:48:07,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 17:48:07,720 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-11-13 17:48:07,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-13 17:48:07,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:07,722 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:07,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:48:07,723 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:07,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:07,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2021-11-13 17:48:07,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:07,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749661873] [2021-11-13 17:48:07,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:07,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:07,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:07,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:48:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:07,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:48:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 17:48:07,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:07,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749661873] [2021-11-13 17:48:07,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749661873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:07,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:07,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:48:07,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729061144] [2021-11-13 17:48:07,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:07,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:48:07,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:07,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:48:07,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:48:07,870 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 17:48:07,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:07,959 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2021-11-13 17:48:07,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:48:07,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-11-13 17:48:07,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:07,963 INFO L225 Difference]: With dead ends: 42 [2021-11-13 17:48:07,964 INFO L226 Difference]: Without dead ends: 40 [2021-11-13 17:48:07,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:48:07,968 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.53ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.20ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:07,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 134 Invalid, 22 Unknown, 0 Unchecked, 5.53ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 56.20ms Time] [2021-11-13 17:48:07,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-13 17:48:07,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-11-13 17:48:07,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 17:48:07,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-11-13 17:48:07,996 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2021-11-13 17:48:07,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:07,998 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-11-13 17:48:07,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 17:48:08,001 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-11-13 17:48:08,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-13 17:48:08,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:08,004 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:08,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 17:48:08,005 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:08,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:08,009 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2021-11-13 17:48:08,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:08,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603651917] [2021-11-13 17:48:08,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:08,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:08,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:08,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:48:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:08,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:48:08,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:08,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 17:48:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 17:48:08,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:08,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603651917] [2021-11-13 17:48:08,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603651917] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:08,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:08,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:48:08,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428962920] [2021-11-13 17:48:08,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:08,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:48:08,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:08,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:48:08,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:48:08,179 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 17:48:08,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:08,284 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-11-13 17:48:08,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:48:08,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-11-13 17:48:08,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:08,287 INFO L225 Difference]: With dead ends: 46 [2021-11-13 17:48:08,287 INFO L226 Difference]: Without dead ends: 44 [2021-11-13 17:48:08,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:48:08,290 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.59ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.26ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:08,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 130 Invalid, 32 Unknown, 0 Unchecked, 5.59ms Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 70.26ms Time] [2021-11-13 17:48:08,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-13 17:48:08,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-11-13 17:48:08,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 17:48:08,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-11-13 17:48:08,304 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2021-11-13 17:48:08,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:08,305 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-11-13 17:48:08,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 17:48:08,305 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-11-13 17:48:08,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-13 17:48:08,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:08,312 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:08,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 17:48:08,312 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:08,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:08,313 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2021-11-13 17:48:08,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:08,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708841938] [2021-11-13 17:48:08,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:08,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:08,349 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:48:08,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954565530] [2021-11-13 17:48:08,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:08,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:08,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:08,360 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:08,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:48:08,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:08,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 17:48:08,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 17:48:08,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:48:08,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:08,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708841938] [2021-11-13 17:48:08,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:48:08,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954565530] [2021-11-13 17:48:08,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954565530] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:08,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:08,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:48:08,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607643901] [2021-11-13 17:48:08,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:08,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:48:08,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:08,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:48:08,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:48:08,698 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:48:08,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:08,779 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2021-11-13 17:48:08,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:48:08,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-11-13 17:48:08,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:08,782 INFO L225 Difference]: With dead ends: 65 [2021-11-13 17:48:08,782 INFO L226 Difference]: Without dead ends: 51 [2021-11-13 17:48:08,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:48:08,785 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.76ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.51ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:08,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 141 Invalid, 41 Unknown, 0 Unchecked, 2.76ms Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 56.51ms Time] [2021-11-13 17:48:08,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-13 17:48:08,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-13 17:48:08,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-13 17:48:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-11-13 17:48:08,801 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 34 [2021-11-13 17:48:08,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:08,801 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-11-13 17:48:08,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:48:08,802 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-11-13 17:48:08,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 17:48:08,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:08,804 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:08,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:48:09,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:09,012 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:09,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:09,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2021-11-13 17:48:09,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:09,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833608244] [2021-11-13 17:48:09,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:09,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:09,044 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:48:09,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177915103] [2021-11-13 17:48:09,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:09,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:09,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:09,052 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:09,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:48:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 17:48:09,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:09,661 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 17:48:09,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:48:09,949 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 17:48:09,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:09,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833608244] [2021-11-13 17:48:09,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:48:09,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177915103] [2021-11-13 17:48:09,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177915103] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 17:48:09,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:48:09,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-11-13 17:48:09,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113768755] [2021-11-13 17:48:09,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:09,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:48:09,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:09,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:48:09,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:48:09,957 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 17:48:10,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:10,085 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2021-11-13 17:48:10,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:48:10,086 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2021-11-13 17:48:10,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:10,091 INFO L225 Difference]: With dead ends: 64 [2021-11-13 17:48:10,092 INFO L226 Difference]: Without dead ends: 62 [2021-11-13 17:48:10,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:48:10,096 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.04ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.08ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:10,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 158 Invalid, 42 Unknown, 0 Unchecked, 3.04ms Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 78.08ms Time] [2021-11-13 17:48:10,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-13 17:48:10,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-11-13 17:48:10,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-13 17:48:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2021-11-13 17:48:10,132 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 41 [2021-11-13 17:48:10,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:10,134 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2021-11-13 17:48:10,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 17:48:10,135 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2021-11-13 17:48:10,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 17:48:10,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:10,141 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:10,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:48:10,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:10,356 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:10,357 INFO L85 PathProgramCache]: Analyzing trace with hash 105343995, now seen corresponding path program 1 times [2021-11-13 17:48:10,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:10,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931583337] [2021-11-13 17:48:10,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:10,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:10,371 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:48:10,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332520115] [2021-11-13 17:48:10,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:10,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:10,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:10,383 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:10,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:48:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:10,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 17:48:10,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 17:48:10,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:48:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 17:48:10,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:10,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931583337] [2021-11-13 17:48:10,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:48:10,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332520115] [2021-11-13 17:48:10,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332520115] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 17:48:10,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:48:10,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-11-13 17:48:10,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570097343] [2021-11-13 17:48:10,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:10,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:48:10,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:10,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:48:10,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:48:10,983 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 17:48:11,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:11,061 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2021-11-13 17:48:11,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:48:11,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2021-11-13 17:48:11,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:11,063 INFO L225 Difference]: With dead ends: 72 [2021-11-13 17:48:11,063 INFO L226 Difference]: Without dead ends: 70 [2021-11-13 17:48:11,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:48:11,065 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.03ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.05ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:11,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 125 Invalid, 39 Unknown, 0 Unchecked, 2.03ms Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 52.05ms Time] [2021-11-13 17:48:11,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-13 17:48:11,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2021-11-13 17:48:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-13 17:48:11,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2021-11-13 17:48:11,079 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 51 [2021-11-13 17:48:11,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:11,080 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2021-11-13 17:48:11,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 17:48:11,080 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2021-11-13 17:48:11,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-13 17:48:11,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:11,082 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:11,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:48:11,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-13 17:48:11,292 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:11,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:11,292 INFO L85 PathProgramCache]: Analyzing trace with hash 957489548, now seen corresponding path program 1 times [2021-11-13 17:48:11,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:11,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411677202] [2021-11-13 17:48:11,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:11,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:11,306 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:48:11,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174935307] [2021-11-13 17:48:11,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:11,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:11,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:11,308 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:11,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:48:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:11,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 17:48:11,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-13 17:48:11,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:48:11,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:11,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411677202] [2021-11-13 17:48:11,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:48:11,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174935307] [2021-11-13 17:48:11,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174935307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:11,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:11,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:48:11,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746665863] [2021-11-13 17:48:11,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:11,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:48:11,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:11,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:48:11,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:48:11,578 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 17:48:11,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:11,650 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2021-11-13 17:48:11,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:48:11,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-11-13 17:48:11,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:11,656 INFO L225 Difference]: With dead ends: 75 [2021-11-13 17:48:11,656 INFO L226 Difference]: Without dead ends: 68 [2021-11-13 17:48:11,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:48:11,658 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.61ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.79ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:11,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 116 Invalid, 43 Unknown, 0 Unchecked, 4.61ms Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 41.79ms Time] [2021-11-13 17:48:11,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-13 17:48:11,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-11-13 17:48:11,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 40 states have (on average 1.15) internal successors, (46), 43 states have internal predecessors, (46), 18 states have call successors, (18), 8 states have call predecessors, (18), 8 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-13 17:48:11,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2021-11-13 17:48:11,682 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 52 [2021-11-13 17:48:11,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:11,683 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2021-11-13 17:48:11,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 17:48:11,683 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2021-11-13 17:48:11,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-13 17:48:11,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:11,685 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:11,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-13 17:48:11,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-13 17:48:11,911 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:11,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:11,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2021-11-13 17:48:11,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:11,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012157690] [2021-11-13 17:48:11,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:11,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:11,929 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:48:11,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476912313] [2021-11-13 17:48:11,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:11,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:11,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:11,931 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:11,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 17:48:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:12,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-13 17:48:12,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-13 17:48:13,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:48:55,545 WARN L227 SmtUtils]: Spent 32.79s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 17:50:14,714 WARN L227 SmtUtils]: Spent 23.72s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 17:51:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-13 17:51:24,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:51:24,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012157690] [2021-11-13 17:51:24,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:51:24,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476912313] [2021-11-13 17:51:24,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476912313] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:51:24,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:51:24,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-11-13 17:51:24,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209360494] [2021-11-13 17:51:24,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:51:24,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 17:51:24,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:51:24,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 17:51:24,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-11-13 17:51:24,557 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2021-11-13 17:51:41,829 WARN L227 SmtUtils]: Spent 16.06s on a formula simplification. DAG size of input: 51 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 17:51:45,511 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse13 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296))) (let ((.cse3 (* .cse13 |c_ULTIMATE.start_main_~p~0#1|)) (.cse1 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse2 (* .cse13 |c_ULTIMATE.start_main_~q~0#1|))) (and (let ((.cse0 (* 2 .cse3))) (or (not (= (* 2 |c_ULTIMATE.start_main_~d~0#1|) .cse0)) (= .cse1 (+ |c_ULTIMATE.start_main_~r~0#1| .cse2)) (< |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~d~0#1|) (<= .cse0 |c_ULTIMATE.start_main_~r~0#1|))) (or (not (= .cse3 |c_ULTIMATE.start_main_~d~0#1|)) (<= |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~r~0#1|) (let ((.cse7 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0)) (.cse12 (* .cse13 (div |c_ULTIMATE.start_main_~p~0#1| 2)))) (let ((.cse5 (+ |c_ULTIMATE.start_main_~r~0#1| .cse2 .cse13 .cse12)) (.cse9 (not .cse7)) (.cse8 (+ |c_ULTIMATE.start_main_~r~0#1| .cse2 .cse12)) (.cse10 (div |c_ULTIMATE.start_main_~d~0#1| 2)) (.cse4 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0))) (and (or (and (not .cse4) (< |c_ULTIMATE.start_main_~d~0#1| 0)) (let ((.cse6 (+ .cse10 .cse1))) (and (or (= .cse5 .cse6) .cse7 (<= 0 |c_ULTIMATE.start_main_~p~0#1|)) (or (= .cse6 .cse8) (and (< |c_ULTIMATE.start_main_~p~0#1| 0) .cse9))))) (or (let ((.cse11 (+ .cse10 .cse1 1))) (and (or .cse7 (= .cse5 .cse11)) (or .cse9 (= .cse11 .cse8)))) .cse4 (<= 0 |c_ULTIMATE.start_main_~d~0#1|))))))))) is different from true [2021-11-13 17:51:47,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:51:47,522 INFO L93 Difference]: Finished difference Result 140 states and 183 transitions. [2021-11-13 17:51:47,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 17:51:47,522 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 71 [2021-11-13 17:51:47,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:51:47,524 INFO L225 Difference]: With dead ends: 140 [2021-11-13 17:51:47,524 INFO L226 Difference]: Without dead ends: 113 [2021-11-13 17:51:47,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 79.7s TimeCoverageRelationStatistics Valid=107, Invalid=402, Unknown=1, NotChecked=42, Total=552 [2021-11-13 17:51:47,526 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 59 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3620.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.71ms SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 3703.15ms IncrementalHoareTripleChecker+Time [2021-11-13 17:51:47,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 231 Invalid, 427 Unknown, 0 Unchecked, 7.71ms Time], IncrementalHoareTripleChecker [140 Valid, 282 Invalid, 0 Unknown, 5 Unchecked, 3703.15ms Time] [2021-11-13 17:51:47,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-13 17:51:47,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 99. [2021-11-13 17:51:47,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 59 states have (on average 1.152542372881356) internal successors, (68), 64 states have internal predecessors, (68), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-13 17:51:47,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2021-11-13 17:51:47,545 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 71 [2021-11-13 17:51:47,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:51:47,545 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2021-11-13 17:51:47,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2021-11-13 17:51:47,546 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2021-11-13 17:51:47,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-13 17:51:47,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:51:47,548 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:51:47,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 17:51:47,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:51:47,768 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:51:47,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:51:47,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1620227847, now seen corresponding path program 1 times [2021-11-13 17:51:47,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:51:47,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518845904] [2021-11-13 17:51:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:47,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:51:47,784 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:51:47,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445833139] [2021-11-13 17:51:47,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:47,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:51:47,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:51:47,799 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:51:47,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 17:51:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:47,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-13 17:51:47,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:51:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 46 proven. 10 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-11-13 17:51:55,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:51:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 46 proven. 10 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-11-13 17:51:59,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:51:59,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518845904] [2021-11-13 17:51:59,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:51:59,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445833139] [2021-11-13 17:51:59,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445833139] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:51:59,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:51:59,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-11-13 17:51:59,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485655064] [2021-11-13 17:51:59,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:51:59,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-13 17:51:59,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:51:59,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-13 17:51:59,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-11-13 17:51:59,377 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) [2021-11-13 17:52:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:09,400 INFO L93 Difference]: Finished difference Result 145 states and 182 transitions. [2021-11-13 17:52:09,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 17:52:09,401 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) Word has length 82 [2021-11-13 17:52:09,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:09,404 INFO L225 Difference]: With dead ends: 145 [2021-11-13 17:52:09,404 INFO L226 Difference]: Without dead ends: 107 [2021-11-13 17:52:09,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2021-11-13 17:52:09,407 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5049.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.03ms SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5151.03ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:09,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 310 Invalid, 524 Unknown, 0 Unchecked, 7.03ms Time], IncrementalHoareTripleChecker [99 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 5151.03ms Time] [2021-11-13 17:52:09,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-13 17:52:09,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2021-11-13 17:52:09,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 60 states have internal predecessors, (64), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 17:52:09,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2021-11-13 17:52:09,429 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 82 [2021-11-13 17:52:09,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:09,430 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2021-11-13 17:52:09,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) [2021-11-13 17:52:09,431 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2021-11-13 17:52:09,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-13 17:52:09,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:09,433 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:09,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 17:52:09,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-13 17:52:09,660 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:52:09,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:09,660 INFO L85 PathProgramCache]: Analyzing trace with hash -219918921, now seen corresponding path program 1 times [2021-11-13 17:52:09,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:09,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919177012] [2021-11-13 17:52:09,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:09,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:09,700 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:52:09,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386548798] [2021-11-13 17:52:09,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:09,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:52:09,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:52:09,715 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:52:09,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 17:52:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:09,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 17:52:09,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:52:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-11-13 17:52:10,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:52:10,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:10,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919177012] [2021-11-13 17:52:10,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:52:10,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386548798] [2021-11-13 17:52:10,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386548798] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:52:10,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:52:10,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:52:10,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083550054] [2021-11-13 17:52:10,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:52:10,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:52:10,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:10,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:52:10,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:52:10,125 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-13 17:52:10,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:10,222 INFO L93 Difference]: Finished difference Result 107 states and 128 transitions. [2021-11-13 17:52:10,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:52:10,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 91 [2021-11-13 17:52:10,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:10,225 INFO L225 Difference]: With dead ends: 107 [2021-11-13 17:52:10,225 INFO L226 Difference]: Without dead ends: 95 [2021-11-13 17:52:10,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:52:10,227 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 9 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.24ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.37ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:10,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 117 Invalid, 33 Unknown, 0 Unchecked, 1.24ms Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 83.37ms Time] [2021-11-13 17:52:10,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-13 17:52:10,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-13 17:52:10,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 60 states have internal predecessors, (65), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 17:52:10,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2021-11-13 17:52:10,245 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 91 [2021-11-13 17:52:10,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:10,247 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2021-11-13 17:52:10,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-13 17:52:10,248 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2021-11-13 17:52:10,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-13 17:52:10,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:10,253 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:10,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 17:52:10,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:52:10,454 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:52:10,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:10,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2103086134, now seen corresponding path program 2 times [2021-11-13 17:52:10,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:10,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382568111] [2021-11-13 17:52:10,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:10,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:10,464 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:52:10,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743771513] [2021-11-13 17:52:10,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:52:10,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:52:10,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:52:10,474 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:52:10,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 17:52:10,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:52:10,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:52:10,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-13 17:52:10,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:52:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-13 17:52:11,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:52:39,182 WARN L227 SmtUtils]: Spent 6.91s on a formula simplification that was a NOOP. DAG size: 132 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 17:53:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-13 17:53:23,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:23,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382568111] [2021-11-13 17:53:23,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:53:23,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743771513] [2021-11-13 17:53:23,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743771513] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:53:23,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:53:23,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-11-13 17:53:23,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664369230] [2021-11-13 17:53:23,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:53:23,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 17:53:23,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:23,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 17:53:23,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-11-13 17:53:23,924 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 13 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 11 states have call predecessors, (29), 11 states have call successors, (29) [2021-11-13 17:54:37,711 WARN L227 SmtUtils]: Spent 1.19m on a formula simplification. DAG size of input: 189 DAG size of output: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 17:54:41,283 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-13 17:54:54,047 WARN L227 SmtUtils]: Spent 10.82s on a formula simplification. DAG size of input: 73 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 17:55:19,150 WARN L227 SmtUtils]: Spent 20.89s on a formula simplification. DAG size of input: 68 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 17:55:31,762 WARN L227 SmtUtils]: Spent 11.43s on a formula simplification. DAG size of input: 87 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 17:55:35,826 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-13 17:55:47,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:55:47,054 INFO L93 Difference]: Finished difference Result 203 states and 258 transitions. [2021-11-13 17:55:47,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 17:55:47,055 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 13 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 11 states have call predecessors, (29), 11 states have call successors, (29) Word has length 101 [2021-11-13 17:55:47,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:55:47,058 INFO L225 Difference]: With dead ends: 203 [2021-11-13 17:55:47,058 INFO L226 Difference]: Without dead ends: 157 [2021-11-13 17:55:47,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 143.2s TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2021-11-13 17:55:47,060 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 110 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 251 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17112.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.08ms SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17276.33ms IncrementalHoareTripleChecker+Time [2021-11-13 17:55:47,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 439 Invalid, 734 Unknown, 0 Unchecked, 8.08ms Time], IncrementalHoareTripleChecker [251 Valid, 482 Invalid, 1 Unknown, 0 Unchecked, 17276.33ms Time] [2021-11-13 17:55:47,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-13 17:55:47,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 138. [2021-11-13 17:55:47,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 86 states have (on average 1.127906976744186) internal successors, (97), 89 states have internal predecessors, (97), 35 states have call successors, (35), 16 states have call predecessors, (35), 16 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-13 17:55:47,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 166 transitions. [2021-11-13 17:55:47,099 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 166 transitions. Word has length 101 [2021-11-13 17:55:47,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:55:47,100 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 166 transitions. [2021-11-13 17:55:47,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 13 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 11 states have call predecessors, (29), 11 states have call successors, (29) [2021-11-13 17:55:47,100 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 166 transitions. [2021-11-13 17:55:47,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-13 17:55:47,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:55:47,103 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:55:47,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 17:55:47,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:55:47,320 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:55:47,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:55:47,320 INFO L85 PathProgramCache]: Analyzing trace with hash 144924505, now seen corresponding path program 3 times [2021-11-13 17:55:47,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:55:47,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547201707] [2021-11-13 17:55:47,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:55:47,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:55:47,331 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:55:47,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202435896] [2021-11-13 17:55:47,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 17:55:47,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:55:47,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:55:47,333 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:55:47,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7654e1fe-f1b3-4954-9bd4-3b6ff61a6689/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 17:55:47,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-13 17:55:47,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:55:47,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-13 17:55:47,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:55:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 106 proven. 47 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2021-11-13 17:55:47,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:59:31,063 WARN L860 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (forall ((|aux_mod_v_ULTIMATE.start_main_~B~0#1_BEFORE_CALL_97_62| Int) (|aux_div_aux_mod_v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_79_62_73| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_79| Int)) (let ((.cse0 (* 4294967296 |aux_div_aux_mod_v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_79_62_73|))) (or (<= 4294967296 .cse0) (<= 4294967296 |aux_mod_v_ULTIMATE.start_main_~B~0#1_BEFORE_CALL_97_62|) (<= (+ .cse0 4294967296) 0) (= (+ .cse0 (* |aux_mod_v_ULTIMATE.start_main_~B~0#1_BEFORE_CALL_97_62| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_79|)) 0) (< |aux_mod_v_ULTIMATE.start_main_~B~0#1_BEFORE_CALL_97_62| 0) (= (mod (* (* (- 1) |aux_mod_v_ULTIMATE.start_main_~B~0#1_BEFORE_CALL_97_62| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_79|) (- 1)) (mod |aux_mod_v_ULTIMATE.start_main_~B~0#1_BEFORE_CALL_97_62| 4294967296)) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 1)))) is different from true [2021-11-13 18:01:14,321 WARN L227 SmtUtils]: Spent 14.41s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:02:00,562 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((|aux_mod_v_ULTIMATE.start_main_~B~0#1_BEFORE_CALL_97_62| Int) (|aux_div_aux_mod_v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_79_62_73| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_79| Int)) (let ((.cse0 (* 4294967296 |aux_div_aux_mod_v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_79_62_73|))) (or (<= 4294967296 .cse0) (<= 4294967296 |aux_mod_v_ULTIMATE.start_main_~B~0#1_BEFORE_CALL_97_62|) (<= (+ .cse0 4294967296) 0) (= (+ .cse0 (* |aux_mod_v_ULTIMATE.start_main_~B~0#1_BEFORE_CALL_97_62| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_79|)) 0) (< |aux_mod_v_ULTIMATE.start_main_~B~0#1_BEFORE_CALL_97_62| 0) (= (mod (* (* (- 1) |aux_mod_v_ULTIMATE.start_main_~B~0#1_BEFORE_CALL_97_62| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_79|) (- 1)) (mod |aux_mod_v_ULTIMATE.start_main_~B~0#1_BEFORE_CALL_97_62| 4294967296)) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 1))) is different from true