./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8 --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 f7372e141bce7d93eac34ddc01970d0d3ee3e3dd05571cb5550acbf38c8c76e9 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:02:27,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:02:27,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:02:27,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:02:27,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:02:27,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:02:27,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:02:27,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:02:27,878 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:02:27,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:02:27,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:02:27,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:02:27,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:02:27,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:02:27,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:02:27,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:02:27,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:02:27,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:02:27,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:02:27,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:02:27,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:02:27,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:02:27,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:02:27,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:02:27,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:02:27,903 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:02:27,904 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:02:27,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:02:27,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:02:27,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:02:27,907 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:02:27,908 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:02:27,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:02:27,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:02:27,911 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:02:27,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:02:27,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:02:27,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:02:27,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:02:27,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:02:27,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:02:27,919 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:02:27,944 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:02:27,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:02:27,945 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:02:27,945 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:02:27,946 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:02:27,946 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:02:27,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:02:27,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:02:27,947 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:02:27,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:02:27,947 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:02:27,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:02:27,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:02:27,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:02:27,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:02:27,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:02:27,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:02:27,949 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:02:27,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:02:27,949 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:02:27,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:02:27,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:02:27,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:02:27,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:02:27,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:02:27,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:02:27,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:02:27,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:02:27,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:02:27,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:02:27,952 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:02:27,952 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:02:27,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:02:27,952 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_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7372e141bce7d93eac34ddc01970d0d3ee3e3dd05571cb5550acbf38c8c76e9 [2022-11-16 12:02:28,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:02:28,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:02:28,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:02:28,346 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:02:28,347 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:02:28,348 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i [2022-11-16 12:02:28,443 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/data/b22349a1f/f1c89d5899904088b1dd1a0d87291d0d/FLAG34717f39a [2022-11-16 12:02:29,088 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:02:29,091 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i [2022-11-16 12:02:29,100 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/data/b22349a1f/f1c89d5899904088b1dd1a0d87291d0d/FLAG34717f39a [2022-11-16 12:02:29,409 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/data/b22349a1f/f1c89d5899904088b1dd1a0d87291d0d [2022-11-16 12:02:29,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:02:29,413 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:02:29,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:02:29,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:02:29,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:02:29,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:02:29" (1/1) ... [2022-11-16 12:02:29,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19082f0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:29, skipping insertion in model container [2022-11-16 12:02:29,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:02:29" (1/1) ... [2022-11-16 12:02:29,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:02:29,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:02:29,676 WARN L229 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_8d809e9f-6a3a-4751-9668-5fab0871b4c5/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i[951,964] [2022-11-16 12:02:29,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:02:29,705 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:02:29,719 WARN L229 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_8d809e9f-6a3a-4751-9668-5fab0871b4c5/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i[951,964] [2022-11-16 12:02:29,725 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:02:29,743 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:02:29,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:29 WrapperNode [2022-11-16 12:02:29,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:02:29,744 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:02:29,744 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:02:29,745 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:02:29,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:29" (1/1) ... [2022-11-16 12:02:29,761 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:29" (1/1) ... [2022-11-16 12:02:29,788 INFO L138 Inliner]: procedures = 16, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2022-11-16 12:02:29,788 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:02:29,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:02:29,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:02:29,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:02:29,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:29" (1/1) ... [2022-11-16 12:02:29,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:29" (1/1) ... [2022-11-16 12:02:29,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:29" (1/1) ... [2022-11-16 12:02:29,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:29" (1/1) ... [2022-11-16 12:02:29,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:29" (1/1) ... [2022-11-16 12:02:29,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:29" (1/1) ... [2022-11-16 12:02:29,828 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:29" (1/1) ... [2022-11-16 12:02:29,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:29" (1/1) ... [2022-11-16 12:02:29,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:02:29,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:02:29,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:02:29,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:02:29,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:29" (1/1) ... [2022-11-16 12:02:29,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:02:29,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:29,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:02:29,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:02:29,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:02:29,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:02:29,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:02:29,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:02:29,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 12:02:29,937 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 12:02:30,025 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:02:30,028 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:02:30,271 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:02:30,278 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:02:30,278 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 12:02:30,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:02:30 BoogieIcfgContainer [2022-11-16 12:02:30,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:02:30,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:02:30,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:02:30,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:02:30,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:02:29" (1/3) ... [2022-11-16 12:02:30,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62043fa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:02:30, skipping insertion in model container [2022-11-16 12:02:30,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:29" (2/3) ... [2022-11-16 12:02:30,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62043fa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:02:30, skipping insertion in model container [2022-11-16 12:02:30,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:02:30" (3/3) ... [2022-11-16 12:02:30,306 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound5.i [2022-11-16 12:02:30,360 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:02:30,360 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:02:30,455 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:02:30,468 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150fb9b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:02:30,468 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 12:02:30,475 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:02:30,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:02:30,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:30,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:30,485 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:02:30,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:30,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1090701444, now seen corresponding path program 1 times [2022-11-16 12:02:30,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:30,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178620879] [2022-11-16 12:02:30,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:30,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:30,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:30,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178620879] [2022-11-16 12:02:30,677 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-16 12:02:30,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727534494] [2022-11-16 12:02:30,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:30,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:30,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:30,683 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:30,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:02:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:30,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-16 12:02:30,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:30,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:02:30,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727534494] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:30,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:30,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:02:30,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343512122] [2022-11-16 12:02:30,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:30,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:02:30,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:30,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:02:30,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:02:30,875 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:30,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:30,907 INFO L93 Difference]: Finished difference Result 39 states and 58 transitions. [2022-11-16 12:02:30,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:02:30,916 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 12:02:30,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:30,935 INFO L225 Difference]: With dead ends: 39 [2022-11-16 12:02:30,938 INFO L226 Difference]: Without dead ends: 17 [2022-11-16 12:02:30,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:02:30,946 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:30,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:02:30,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-16 12:02:30,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-16 12:02:30,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 12:02:30,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-16 12:02:30,991 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2022-11-16 12:02:30,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:30,992 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-16 12:02:30,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:30,993 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-16 12:02:30,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:02:30,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:30,994 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:31,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:31,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:31,200 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:02:31,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:31,201 INFO L85 PathProgramCache]: Analyzing trace with hash -2095969935, now seen corresponding path program 1 times [2022-11-16 12:02:31,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:31,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345386291] [2022-11-16 12:02:31,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:31,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:31,231 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:02:31,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320855431] [2022-11-16 12:02:31,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:31,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:31,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:31,235 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:31,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:02:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:31,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:02:31,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:31,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:02:31,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:31,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345386291] [2022-11-16 12:02:31,577 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:02:31,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320855431] [2022-11-16 12:02:31,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320855431] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:31,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:31,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 12:02:31,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743269907] [2022-11-16 12:02:31,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:31,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:02:31,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:31,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:02:31,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:02:31,581 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:31,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:31,848 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-11-16 12:02:31,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:02:31,849 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:02:31,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:31,850 INFO L225 Difference]: With dead ends: 29 [2022-11-16 12:02:31,851 INFO L226 Difference]: Without dead ends: 26 [2022-11-16 12:02:31,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:02:31,853 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:31,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 44 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:02:31,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-16 12:02:31,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-16 12:02:31,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:02:31,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-16 12:02:31,865 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 11 [2022-11-16 12:02:31,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:31,866 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-16 12:02:31,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:31,866 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-16 12:02:31,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:02:31,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:31,868 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:31,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 12:02:32,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-16 12:02:32,076 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:02:32,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:32,077 INFO L85 PathProgramCache]: Analyzing trace with hash 975547596, now seen corresponding path program 1 times [2022-11-16 12:02:32,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:32,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363985039] [2022-11-16 12:02:32,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:32,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:32,096 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:02:32,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [719535634] [2022-11-16 12:02:32,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:32,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:32,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:32,106 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:32,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:02:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:32,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:02:32,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:32,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:32,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:32,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:32,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363985039] [2022-11-16 12:02:32,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:02:32,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719535634] [2022-11-16 12:02:32,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719535634] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:32,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:02:32,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-16 12:02:32,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043253038] [2022-11-16 12:02:32,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:32,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:02:32,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:32,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:02:32,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:02:32,743 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:32,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:32,777 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-11-16 12:02:32,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:02:32,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:02:32,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:32,780 INFO L225 Difference]: With dead ends: 34 [2022-11-16 12:02:32,780 INFO L226 Difference]: Without dead ends: 32 [2022-11-16 12:02:32,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:02:32,782 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:32,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 66 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-11-16 12:02:32,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-16 12:02:32,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-16 12:02:32,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 12:02:32,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-11-16 12:02:32,795 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 13 [2022-11-16 12:02:32,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:32,795 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-11-16 12:02:32,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:32,796 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-11-16 12:02:32,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:02:32,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:32,797 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:32,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:33,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:33,005 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:02:33,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:33,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1791376988, now seen corresponding path program 1 times [2022-11-16 12:02:33,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:33,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374788106] [2022-11-16 12:02:33,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:33,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:33,025 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:02:33,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1064796968] [2022-11-16 12:02:33,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:33,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:33,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:33,032 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:33,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:02:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:33,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:02:33,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:33,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:02:33,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:33,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374788106] [2022-11-16 12:02:33,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:02:33,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064796968] [2022-11-16 12:02:33,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064796968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:33,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:33,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:02:33,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983817818] [2022-11-16 12:02:33,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:33,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:02:33,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:33,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:02:33,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:02:33,168 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 12:02:33,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:33,225 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-11-16 12:02:33,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:02:33,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-11-16 12:02:33,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:33,227 INFO L225 Difference]: With dead ends: 43 [2022-11-16 12:02:33,227 INFO L226 Difference]: Without dead ends: 25 [2022-11-16 12:02:33,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:02:33,229 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:33,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:02:33,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-16 12:02:33,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-16 12:02:33,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:02:33,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-16 12:02:33,241 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2022-11-16 12:02:33,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:33,242 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-16 12:02:33,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 12:02:33,242 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-16 12:02:33,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:02:33,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:33,243 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:33,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:33,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:33,450 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:02:33,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:33,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1508058588, now seen corresponding path program 1 times [2022-11-16 12:02:33,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:33,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898194136] [2022-11-16 12:02:33,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:33,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:33,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:02:33,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363091533] [2022-11-16 12:02:33,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:33,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:33,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:33,477 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:33,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:02:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:33,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:02:33,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:02:33,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:02:33,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:33,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898194136] [2022-11-16 12:02:33,821 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:02:33,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363091533] [2022-11-16 12:02:33,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363091533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:33,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:33,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-11-16 12:02:33,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24227663] [2022-11-16 12:02:33,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:33,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:02:33,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:33,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:02:33,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:02:33,828 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 12:02:34,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:34,001 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-11-16 12:02:34,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:02:34,001 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-11-16 12:02:34,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:34,002 INFO L225 Difference]: With dead ends: 31 [2022-11-16 12:02:34,002 INFO L226 Difference]: Without dead ends: 24 [2022-11-16 12:02:34,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:02:34,004 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:34,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 66 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 1 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:02:34,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-16 12:02:34,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-16 12:02:34,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:02:34,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-11-16 12:02:34,012 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2022-11-16 12:02:34,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:34,013 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-11-16 12:02:34,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 12:02:34,013 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-11-16 12:02:34,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 12:02:34,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:34,014 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:34,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-16 12:02:34,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:34,219 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:02:34,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:34,220 INFO L85 PathProgramCache]: Analyzing trace with hash -800204289, now seen corresponding path program 1 times [2022-11-16 12:02:34,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:34,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692408607] [2022-11-16 12:02:34,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:34,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:34,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:02:34,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234905619] [2022-11-16 12:02:34,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:34,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:34,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:34,234 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:34,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:02:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:34,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 12:02:34,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:34,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:37,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:37,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692408607] [2022-11-16 12:02:37,132 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:02:37,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234905619] [2022-11-16 12:02:37,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234905619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:37,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:37,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2022-11-16 12:02:37,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24581048] [2022-11-16 12:02:37,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:37,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:02:37,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:37,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:02:37,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2022-11-16 12:02:37,137 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 15 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:02:54,607 WARN L233 SmtUtils]: Spent 17.16s on a formula simplification. DAG size of input: 41 DAG size of output: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:02:56,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:02:58,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:03:08,162 WARN L233 SmtUtils]: Spent 8.16s on a formula simplification. DAG size of input: 37 DAG size of output: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:03:14,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:03:36,921 WARN L233 SmtUtils]: Spent 17.59s on a formula simplification. DAG size of input: 36 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:03:42,414 WARN L233 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 38 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:03:45,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:03:46,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:03:48,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:03:50,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:03:52,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:03:52,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:52,581 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2022-11-16 12:03:52,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:03:52,585 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 15 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-11-16 12:03:52,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:52,587 INFO L225 Difference]: With dead ends: 74 [2022-11-16 12:03:52,587 INFO L226 Difference]: Without dead ends: 64 [2022-11-16 12:03:52,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 58.2s TimeCoverageRelationStatistics Valid=214, Invalid=715, Unknown=1, NotChecked=0, Total=930 [2022-11-16 12:03:52,589 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 95 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 52 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:52,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 85 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 171 Invalid, 2 Unknown, 0 Unchecked, 19.6s Time] [2022-11-16 12:03:52,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-16 12:03:52,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2022-11-16 12:03:52,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.186046511627907) internal successors, (51), 47 states have internal predecessors, (51), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 12:03:52,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2022-11-16 12:03:52,636 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 21 [2022-11-16 12:03:52,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:52,636 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2022-11-16 12:03:52,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 15 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:03:52,637 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2022-11-16 12:03:52,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 12:03:52,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:52,638 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:52,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-16 12:03:52,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:52,845 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:03:52,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:52,846 INFO L85 PathProgramCache]: Analyzing trace with hash 2122375824, now seen corresponding path program 2 times [2022-11-16 12:03:52,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:52,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9494232] [2022-11-16 12:03:52,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:52,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:52,871 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:03:52,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860064920] [2022-11-16 12:03:52,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:03:52,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:52,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:52,880 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:52,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:03:52,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:03:52,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:52,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:03:52,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:03:53,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:03:53,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:53,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9494232] [2022-11-16 12:03:53,297 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:03:53,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860064920] [2022-11-16 12:03:53,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860064920] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:53,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:03:53,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-16 12:03:53,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922013744] [2022-11-16 12:03:53,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:53,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:03:53,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:53,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:03:53,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:03:53,300 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:03:54,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:54,838 INFO L93 Difference]: Finished difference Result 92 states and 113 transitions. [2022-11-16 12:03:54,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:03:54,839 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2022-11-16 12:03:54,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:54,840 INFO L225 Difference]: With dead ends: 92 [2022-11-16 12:03:54,841 INFO L226 Difference]: Without dead ends: 74 [2022-11-16 12:03:54,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:03:54,842 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 102 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:54,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 120 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 12:03:54,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-16 12:03:54,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2022-11-16 12:03:54,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.15) internal successors, (46), 43 states have internal predecessors, (46), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 12:03:54,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-11-16 12:03:54,867 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 27 [2022-11-16 12:03:54,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:54,868 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-11-16 12:03:54,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:03:54,868 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-11-16 12:03:54,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 12:03:54,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:54,869 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:54,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:55,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:55,088 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:03:55,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:55,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1335567410, now seen corresponding path program 3 times [2022-11-16 12:03:55,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:55,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477543624] [2022-11-16 12:03:55,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:55,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:55,100 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:03:55,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915708276] [2022-11-16 12:03:55,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:03:55,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:55,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:55,102 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:55,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:04:25,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:04:25,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:04:25,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:04:25,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:25,912 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:04:25,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:04:26,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:26,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477543624] [2022-11-16 12:04:26,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:04:26,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915708276] [2022-11-16 12:04:26,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915708276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:26,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:04:26,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-16 12:04:26,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881857015] [2022-11-16 12:04:26,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:26,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:04:26,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:26,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:04:26,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:04:26,409 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 12:04:26,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:26,967 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2022-11-16 12:04:26,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:04:26,968 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2022-11-16 12:04:26,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:26,969 INFO L225 Difference]: With dead ends: 75 [2022-11-16 12:04:26,969 INFO L226 Difference]: Without dead ends: 47 [2022-11-16 12:04:26,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:04:26,971 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:26,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 78 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:04:26,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-16 12:04:26,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2022-11-16 12:04:26,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 12:04:26,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-11-16 12:04:26,988 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 29 [2022-11-16 12:04:26,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:26,989 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-11-16 12:04:26,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 12:04:26,989 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-11-16 12:04:26,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-16 12:04:26,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:26,990 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:27,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:27,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:27,208 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:04:27,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:27,209 INFO L85 PathProgramCache]: Analyzing trace with hash 532465357, now seen corresponding path program 4 times [2022-11-16 12:04:27,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:27,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572712711] [2022-11-16 12:04:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:27,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:27,226 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:04:27,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935778788] [2022-11-16 12:04:27,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:04:27,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:27,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:27,230 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:27,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:04:27,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:04:27,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:04:27,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-16 12:04:27,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:04:28,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:03,817 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse5 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296))) (let ((.cse6 (div .cse5 2))) (let ((.cse3 (mod .cse6 4294967296))) (let ((.cse0 (div .cse3 2)) (.cse1 (* 4294967295 .cse6)) (.cse2 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse4 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (not (<= (mod .cse0 4294967296) (mod (+ |c_ULTIMATE.start_main_~r~0#1| .cse1) 4294967296))) (not (= .cse2 (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296))) (not (<= .cse3 .cse4)) (= (mod (+ (* .cse0 2) |c_ULTIMATE.start_main_~r~0#1| (* .cse0 4 |c_ULTIMATE.start_main_~q~0#1|) .cse1) 4294967296) .cse2) (= .cse3 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296)) (<= .cse5 .cse4)))))) is different from true [2022-11-16 12:05:50,633 WARN L233 SmtUtils]: Spent 10.89s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:06:21,676 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse5 (mod |c_ULTIMATE.start_main_~b~0#1| 1073741824))) (let ((.cse1 (mod .cse5 2147483648))) (let ((.cse4 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse0 (* .cse1 2)) (.cse2 (* .cse5 4294967294)) (.cse3 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (= (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296) .cse0) (not (<= (mod .cse1 4294967296) (mod (+ |c_ULTIMATE.start_main_~r~0#1| .cse2) 4294967296))) (not (<= (* 2 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) .cse3)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~b~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse4)) (= .cse4 (mod (+ (* .cse1 4 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1| .cse0 .cse2) 4294967296)) (<= (* .cse5 4) .cse3))))) is different from true [2022-11-16 12:06:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2022-11-16 12:06:43,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:43,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572712711] [2022-11-16 12:06:43,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:06:43,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935778788] [2022-11-16 12:06:43,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935778788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:43,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:06:43,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-11-16 12:06:43,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011581679] [2022-11-16 12:06:43,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:43,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 12:06:43,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:43,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 12:06:43,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=403, Unknown=6, NotChecked=86, Total=600 [2022-11-16 12:06:43,250 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 23 states have internal predecessors, (44), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 12:06:45,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:06:47,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:09:14,168 WARN L233 SmtUtils]: Spent 2.42m on a formula simplification. DAG size of input: 80 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:09:16,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:09:22,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:09:25,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:09:29,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:09:30,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:09:35,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:09:37,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:09:39,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:09:47,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:09:49,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:09:51,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:10:50,375 WARN L233 SmtUtils]: Spent 45.05s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:10:52,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:10:54,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:10:57,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:11:40,771 WARN L233 SmtUtils]: Spent 41.32s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:11:43,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:11:49,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:11:51,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:11:53,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:11:56,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:11:57,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:11:58,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:12:00,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:12:00,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:12:00,950 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2022-11-16 12:12:00,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:12:00,951 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 23 states have internal predecessors, (44), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2022-11-16 12:12:00,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:12:00,952 INFO L225 Difference]: With dead ends: 83 [2022-11-16 12:12:00,952 INFO L226 Difference]: Without dead ends: 53 [2022-11-16 12:12:00,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 300.3s TimeCoverageRelationStatistics Valid=213, Invalid=776, Unknown=11, NotChecked=122, Total=1122 [2022-11-16 12:12:00,953 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 67 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 81 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 59.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:12:00,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 144 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 287 Invalid, 18 Unknown, 87 Unchecked, 59.2s Time] [2022-11-16 12:12:00,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-16 12:12:00,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2022-11-16 12:12:00,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 12:12:00,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-11-16 12:12:00,977 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 31 [2022-11-16 12:12:00,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:12:00,977 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-11-16 12:12:00,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 23 states have internal predecessors, (44), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 12:12:00,978 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-11-16 12:12:00,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-16 12:12:00,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:12:00,979 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:12:00,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-16 12:12:01,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:12:01,179 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:12:01,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:12:01,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1902764006, now seen corresponding path program 1 times [2022-11-16 12:12:01,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:12:01,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907749853] [2022-11-16 12:12:01,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:12:01,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:12:01,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:12:01,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920543975] [2022-11-16 12:12:01,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:12:01,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:12:01,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:12:01,192 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:12:01,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:12:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:01,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-16 12:12:01,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:12:01,876 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:12:01,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:13:00,449 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse3 (mod |c_ULTIMATE.start_main_~b~0#1| 1073741824)) (.cse0 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (not (<= (* 2 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) .cse0)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~b~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse1)) (= .cse1 (mod (let ((.cse2 (mod .cse3 2147483648))) (+ (* .cse2 4 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1| (* .cse2 2) (* .cse3 4294967294))) 4294967296)) (<= (* .cse3 4) .cse0))) is different from true [2022-11-16 12:13:27,927 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~b~0#1| 536870912)) (.cse2 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (<= (* 8 .cse0) .cse1) (not (= .cse2 (mod (+ (* 8 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296))) (= (mod (let ((.cse3 (mod .cse0 1073741824))) (+ |c_ULTIMATE.start_main_~r~0#1| (* .cse3 4) (* 4294967292 .cse0) (* 8 .cse3 |c_ULTIMATE.start_main_~q~0#1|))) 4294967296) .cse2) (not (<= (* (mod |c_ULTIMATE.start_main_~b~0#1| 1073741824) 4) .cse1)))) is different from true [2022-11-16 12:13:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 10 not checked. [2022-11-16 12:13:40,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:13:40,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907749853] [2022-11-16 12:13:40,306 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:13:40,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920543975] [2022-11-16 12:13:40,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920543975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:13:40,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:13:40,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2022-11-16 12:13:40,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519361261] [2022-11-16 12:13:40,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:13:40,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:13:40,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:13:40,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:13:40,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=450, Unknown=4, NotChecked=90, Total=650 [2022-11-16 12:13:40,308 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 24 states have internal predecessors, (50), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 12:13:41,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:13:43,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:13:45,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:13:47,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:13:52,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:13:55,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:13:59,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:14:03,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:14:31,773 WARN L233 SmtUtils]: Spent 24.99s on a formula simplification. DAG size of input: 47 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:14:33,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:14:35,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:14:38,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:14:40,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:14:42,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:15:33,201 WARN L233 SmtUtils]: Spent 45.76s on a formula simplification. DAG size of input: 55 DAG size of output: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:15:35,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:15:38,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:15:47,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:16:26,961 WARN L233 SmtUtils]: Spent 35.77s on a formula simplification. DAG size of input: 51 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:16:29,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:29,486 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2022-11-16 12:16:29,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:16:29,487 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 24 states have internal predecessors, (50), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 33 [2022-11-16 12:16:29,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:29,488 INFO L225 Difference]: With dead ends: 67 [2022-11-16 12:16:29,488 INFO L226 Difference]: Without dead ends: 51 [2022-11-16 12:16:29,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 162.8s TimeCoverageRelationStatistics Valid=267, Invalid=1138, Unknown=9, NotChecked=146, Total=1560 [2022-11-16 12:16:29,490 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 109 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 76 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 39.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:29,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 105 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 220 Invalid, 8 Unknown, 76 Unchecked, 39.0s Time] [2022-11-16 12:16:29,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-16 12:16:29,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2022-11-16 12:16:29,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 12:16:29,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-11-16 12:16:29,517 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 33 [2022-11-16 12:16:29,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:29,517 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-11-16 12:16:29,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 24 states have internal predecessors, (50), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 12:16:29,517 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-11-16 12:16:29,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 12:16:29,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:29,518 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:29,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:16:29,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:16:29,731 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:16:29,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:29,731 INFO L85 PathProgramCache]: Analyzing trace with hash 883053337, now seen corresponding path program 2 times [2022-11-16 12:16:29,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:29,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877243437] [2022-11-16 12:16:29,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:29,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:29,743 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:16:29,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840266036] [2022-11-16 12:16:29,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:16:29,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:29,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:29,745 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:16:29,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:16:30,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:16:30,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:16:30,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 12:16:30,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:16:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:16:31,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:17:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 22 refuted. 8 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:17:26,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:26,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877243437] [2022-11-16 12:17:26,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:17:26,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840266036] [2022-11-16 12:17:26,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840266036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:17:26,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:17:26,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-11-16 12:17:26,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913675017] [2022-11-16 12:17:26,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:17:26,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:17:26,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:26,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:17:26,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=500, Unknown=13, NotChecked=0, Total=650 [2022-11-16 12:17:26,546 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 24 states have internal predecessors, (51), 8 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:17:34,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:17:39,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:39,266 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2022-11-16 12:17:39,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:17:39,266 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 24 states have internal predecessors, (51), 8 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2022-11-16 12:17:39,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:39,267 INFO L225 Difference]: With dead ends: 56 [2022-11-16 12:17:39,267 INFO L226 Difference]: Without dead ends: 0 [2022-11-16 12:17:39,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 50.6s TimeCoverageRelationStatistics Valid=275, Invalid=972, Unknown=13, NotChecked=0, Total=1260 [2022-11-16 12:17:39,268 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 124 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 106 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:39,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 126 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 285 Invalid, 1 Unknown, 0 Unchecked, 10.2s Time] [2022-11-16 12:17:39,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-16 12:17:39,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-16 12:17:39,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:39,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-16 12:17:39,270 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2022-11-16 12:17:39,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:39,270 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 12:17:39,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 24 states have internal predecessors, (51), 8 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:17:39,271 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-16 12:17:39,271 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-16 12:17:39,274 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-16 12:17:39,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-16 12:17:39,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d809e9f-6a3a-4751-9668-5fab0871b4c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 12:17:39,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.