./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc --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 9f971bd1a6fba471cdece6d295ca31488341eb806ea8364f7549d05755c7a031 --- 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-5e519f3 [2022-11-02 21:01:43,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:01:43,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:01:43,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:01:43,851 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:01:43,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:01:43,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:01:43,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:01:43,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:01:43,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:01:43,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:01:43,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:01:43,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:01:43,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:01:43,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:01:43,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:01:43,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:01:43,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:01:43,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:01:43,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:01:43,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:01:43,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:01:43,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:01:43,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:01:43,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:01:43,880 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:01:43,881 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:01:43,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:01:43,883 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:01:43,884 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:01:43,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:01:43,886 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:01:43,887 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:01:43,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:01:43,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:01:43,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:01:43,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:01:43,891 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:01:43,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:01:43,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:01:43,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:01:43,894 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:01:43,919 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:01:43,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:01:43,920 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:01:43,921 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:01:43,921 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:01:43,922 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:01:43,923 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:01:43,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:01:43,923 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:01:43,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:01:43,924 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:01:43,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:01:43,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:01:43,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:01:43,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:01:43,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:01:43,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:01:43,926 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:01:43,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:01:43,927 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:01:43,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:01:43,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:01:43,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:01:43,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:01:43,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:01:43,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:01:43,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:01:43,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:01:43,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:01:43,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:01:43,930 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:01:43,930 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:01:43,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:01:43,931 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_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f971bd1a6fba471cdece6d295ca31488341eb806ea8364f7549d05755c7a031 [2022-11-02 21:01:44,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:01:44,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:01:44,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:01:44,237 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:01:44,238 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:01:44,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c [2022-11-02 21:01:44,310 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/data/97bb4aae7/432dee457da649f8a2f4757566a7c4be/FLAGe8fbe23d0 [2022-11-02 21:01:44,802 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:01:44,803 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c [2022-11-02 21:01:44,811 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/data/97bb4aae7/432dee457da649f8a2f4757566a7c4be/FLAGe8fbe23d0 [2022-11-02 21:01:45,177 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/data/97bb4aae7/432dee457da649f8a2f4757566a7c4be [2022-11-02 21:01:45,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:01:45,180 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:01:45,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:01:45,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:01:45,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:01:45,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:01:45" (1/1) ... [2022-11-02 21:01:45,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ecd903f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:45, skipping insertion in model container [2022-11-02 21:01:45,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:01:45" (1/1) ... [2022-11-02 21:01:45,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:01:45,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:01:45,469 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c[526,539] [2022-11-02 21:01:45,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:01:45,512 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:01:45,529 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c[526,539] [2022-11-02 21:01:45,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:01:45,570 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:01:45,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:45 WrapperNode [2022-11-02 21:01:45,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:01:45,575 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:01:45,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:01:45,576 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:01:45,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:45" (1/1) ... [2022-11-02 21:01:45,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:45" (1/1) ... [2022-11-02 21:01:45,620 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 61 [2022-11-02 21:01:45,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:01:45,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:01:45,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:01:45,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:01:45,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:45" (1/1) ... [2022-11-02 21:01:45,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:45" (1/1) ... [2022-11-02 21:01:45,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:45" (1/1) ... [2022-11-02 21:01:45,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:45" (1/1) ... [2022-11-02 21:01:45,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:45" (1/1) ... [2022-11-02 21:01:45,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:45" (1/1) ... [2022-11-02 21:01:45,666 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:45" (1/1) ... [2022-11-02 21:01:45,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:45" (1/1) ... [2022-11-02 21:01:45,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:01:45,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:01:45,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:01:45,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:01:45,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:45" (1/1) ... [2022-11-02 21:01:45,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:01:45,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:45,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:01:45,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:01:45,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:01:45,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:01:45,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:01:45,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:01:45,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 21:01:45,765 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 21:01:45,830 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:01:45,832 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:01:45,976 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:01:45,983 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:01:45,983 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 21:01:45,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:01:45 BoogieIcfgContainer [2022-11-02 21:01:45,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:01:45,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:01:45,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:01:45,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:01:45,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:01:45" (1/3) ... [2022-11-02 21:01:45,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0b1d41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:01:45, skipping insertion in model container [2022-11-02 21:01:45,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:45" (2/3) ... [2022-11-02 21:01:46,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0b1d41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:01:45, skipping insertion in model container [2022-11-02 21:01:46,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:01:45" (3/3) ... [2022-11-02 21:01:46,001 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound10.c [2022-11-02 21:01:46,020 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:01:46,020 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:01:46,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:01:46,110 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;@76759ec2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:01:46,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 21:01:46,117 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-02 21:01:46,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-02 21:01:46,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:46,124 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:46,124 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:46,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:46,129 INFO L85 PathProgramCache]: Analyzing trace with hash 643118537, now seen corresponding path program 1 times [2022-11-02 21:01:46,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:46,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122512478] [2022-11-02 21:01:46,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:46,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:46,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:46,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122512478] [2022-11-02 21:01:46,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 21:01:46,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289359440] [2022-11-02 21:01:46,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:46,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:46,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:46,258 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:46,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:01:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:46,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-02 21:01:46,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:01:46,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:46,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289359440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:46,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:46,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:01:46,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195576663] [2022-11-02 21:01:46,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:46,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 21:01:46,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:46,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 21:01:46,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 21:01:46,407 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-11-02 21:01:46,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:46,432 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2022-11-02 21:01:46,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 21:01:46,434 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 8 [2022-11-02 21:01:46,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:46,443 INFO L225 Difference]: With dead ends: 50 [2022-11-02 21:01:46,443 INFO L226 Difference]: Without dead ends: 22 [2022-11-02 21:01:46,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 21:01:46,451 INFO L413 NwaCegarLoop]: 36 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, 36 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 [2022-11-02 21:01:46,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:01:46,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-02 21:01:46,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-02 21:01:46,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 21:01:46,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2022-11-02 21:01:46,528 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2022-11-02 21:01:46,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:46,529 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2022-11-02 21:01:46,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-11-02 21:01:46,529 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2022-11-02 21:01:46,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-02 21:01:46,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:46,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:46,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:46,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-02 21:01:46,731 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:46,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:46,732 INFO L85 PathProgramCache]: Analyzing trace with hash 181060127, now seen corresponding path program 1 times [2022-11-02 21:01:46,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:46,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544210328] [2022-11-02 21:01:46,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:46,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:46,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:01:46,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:46,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544210328] [2022-11-02 21:01:46,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544210328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:46,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:46,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:01:46,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731393340] [2022-11-02 21:01:46,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:46,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:01:46,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:46,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:01:46,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:01:46,964 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-02 21:01:47,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:47,029 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2022-11-02 21:01:47,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:01:47,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 8 [2022-11-02 21:01:47,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:47,032 INFO L225 Difference]: With dead ends: 36 [2022-11-02 21:01:47,032 INFO L226 Difference]: Without dead ends: 34 [2022-11-02 21:01:47,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:01:47,034 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:47,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 99 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:01:47,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-02 21:01:47,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2022-11-02 21:01:47,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 21:01:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2022-11-02 21:01:47,051 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2022-11-02 21:01:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:47,052 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-11-02 21:01:47,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-02 21:01:47,052 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2022-11-02 21:01:47,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-02 21:01:47,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:47,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:47,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 21:01:47,054 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:47,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:47,055 INFO L85 PathProgramCache]: Analyzing trace with hash -712280900, now seen corresponding path program 1 times [2022-11-02 21:01:47,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:47,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059546051] [2022-11-02 21:01:47,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:47,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:47,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:47,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059546051] [2022-11-02 21:01:47,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 21:01:47,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026199512] [2022-11-02 21:01:47,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:47,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:47,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:47,077 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:47,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:01:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:47,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:01:47,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:01:47,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:47,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026199512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:47,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:47,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:01:47,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771452729] [2022-11-02 21:01:47,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:47,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:01:47,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:47,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:01:47,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:01:47,184 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2022-11-02 21:01:47,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:47,204 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2022-11-02 21:01:47,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:01:47,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 [2022-11-02 21:01:47,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:47,205 INFO L225 Difference]: With dead ends: 42 [2022-11-02 21:01:47,206 INFO L226 Difference]: Without dead ends: 28 [2022-11-02 21:01:47,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:01:47,208 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:47,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:01:47,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-02 21:01:47,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-02 21:01:47,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 21:01:47,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-11-02 21:01:47,217 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2022-11-02 21:01:47,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:47,217 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-11-02 21:01:47,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2022-11-02 21:01:47,218 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-11-02 21:01:47,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 21:01:47,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:47,218 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:47,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:47,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:47,445 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:47,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:47,446 INFO L85 PathProgramCache]: Analyzing trace with hash 2036073049, now seen corresponding path program 1 times [2022-11-02 21:01:47,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:47,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143500839] [2022-11-02 21:01:47,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:47,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:47,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:01:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:01:47,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:47,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143500839] [2022-11-02 21:01:47,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143500839] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:47,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:47,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:01:47,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286847349] [2022-11-02 21:01:47,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:47,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:01:47,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:47,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:01:47,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:01:47,689 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 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) [2022-11-02 21:01:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:47,752 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2022-11-02 21:01:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:01:47,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 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 13 [2022-11-02 21:01:47,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:47,754 INFO L225 Difference]: With dead ends: 42 [2022-11-02 21:01:47,754 INFO L226 Difference]: Without dead ends: 40 [2022-11-02 21:01:47,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:01:47,756 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:47,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 95 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:01:47,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-02 21:01:47,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-11-02 21:01:47,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 21:01:47,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-11-02 21:01:47,771 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2022-11-02 21:01:47,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:47,771 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-11-02 21:01:47,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 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) [2022-11-02 21:01:47,772 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-11-02 21:01:47,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 21:01:47,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:47,772 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:47,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 21:01:47,773 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:47,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:47,774 INFO L85 PathProgramCache]: Analyzing trace with hash 380169759, now seen corresponding path program 1 times [2022-11-02 21:01:47,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:47,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202192388] [2022-11-02 21:01:47,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:47,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:47,810 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:01:47,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559857589] [2022-11-02 21:01:47,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:47,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:47,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:47,817 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:47,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:01:47,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:47,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:01:47,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:01:47,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:47,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:48,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202192388] [2022-11-02 21:01:48,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:01:48,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559857589] [2022-11-02 21:01:48,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559857589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:48,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:48,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:01:48,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762149893] [2022-11-02 21:01:48,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:48,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:01:48,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:48,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:01:48,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:01:48,008 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 21:01:48,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:48,123 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2022-11-02 21:01:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:01:48,124 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-11-02 21:01:48,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:48,125 INFO L225 Difference]: With dead ends: 61 [2022-11-02 21:01:48,127 INFO L226 Difference]: Without dead ends: 46 [2022-11-02 21:01:48,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:01:48,129 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 10 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:48,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 105 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:01:48,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-02 21:01:48,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-02 21:01:48,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 30 states have internal predecessors, (36), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-02 21:01:48,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-11-02 21:01:48,141 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 18 [2022-11-02 21:01:48,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:48,142 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-11-02 21:01:48,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 21:01:48,142 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-11-02 21:01:48,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 21:01:48,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:48,143 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:48,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:48,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:48,364 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:48,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:48,365 INFO L85 PathProgramCache]: Analyzing trace with hash -461064832, now seen corresponding path program 1 times [2022-11-02 21:01:48,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:48,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337750787] [2022-11-02 21:01:48,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:48,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:48,376 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:01:48,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086939275] [2022-11-02 21:01:48,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:48,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:48,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:48,378 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:48,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 21:01:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:48,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:01:48,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:01:48,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:48,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:48,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337750787] [2022-11-02 21:01:48,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:01:48,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086939275] [2022-11-02 21:01:48,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086939275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:48,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:48,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:01:48,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656281305] [2022-11-02 21:01:48,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:48,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:01:48,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:48,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:01:48,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:01:48,564 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:01:48,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:48,627 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2022-11-02 21:01:48,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:01:48,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-11-02 21:01:48,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:48,629 INFO L225 Difference]: With dead ends: 60 [2022-11-02 21:01:48,629 INFO L226 Difference]: Without dead ends: 52 [2022-11-02 21:01:48,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:01:48,631 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:48,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 79 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:01:48,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-02 21:01:48,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-11-02 21:01:48,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.28125) internal successors, (41), 34 states have internal predecessors, (41), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-02 21:01:48,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2022-11-02 21:01:48,643 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 26 [2022-11-02 21:01:48,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:48,643 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2022-11-02 21:01:48,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:01:48,644 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2022-11-02 21:01:48,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 21:01:48,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:48,645 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:48,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:48,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 21:01:48,864 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:48,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:48,865 INFO L85 PathProgramCache]: Analyzing trace with hash -909290541, now seen corresponding path program 1 times [2022-11-02 21:01:48,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:48,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699227726] [2022-11-02 21:01:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:48,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:48,876 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:01:48,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468213505] [2022-11-02 21:01:48,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:48,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:48,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:48,878 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:48,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 21:01:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:48,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 21:01:48,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 21:01:49,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:01:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:01:49,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:49,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699227726] [2022-11-02 21:01:49,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:01:49,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468213505] [2022-11-02 21:01:49,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468213505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:01:49,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:01:49,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-02 21:01:49,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530720235] [2022-11-02 21:01:49,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:01:49,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:01:49,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:49,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:01:49,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:01:49,088 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 21:01:49,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:49,245 INFO L93 Difference]: Finished difference Result 140 states and 173 transitions. [2022-11-02 21:01:49,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:01:49,246 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 33 [2022-11-02 21:01:49,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:49,254 INFO L225 Difference]: With dead ends: 140 [2022-11-02 21:01:49,254 INFO L226 Difference]: Without dead ends: 115 [2022-11-02 21:01:49,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:01:49,259 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 40 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:49,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 180 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:01:49,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-02 21:01:49,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 108. [2022-11-02 21:01:49,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 73 states have internal predecessors, (85), 23 states have call successors, (23), 14 states have call predecessors, (23), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-02 21:01:49,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2022-11-02 21:01:49,282 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 33 [2022-11-02 21:01:49,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:49,282 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2022-11-02 21:01:49,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 21:01:49,283 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2022-11-02 21:01:49,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 21:01:49,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:49,284 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:49,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:49,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:49,505 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:49,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:49,506 INFO L85 PathProgramCache]: Analyzing trace with hash 252591112, now seen corresponding path program 1 times [2022-11-02 21:01:49,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:49,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724050341] [2022-11-02 21:01:49,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:49,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:49,515 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:01:49,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561418417] [2022-11-02 21:01:49,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:49,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:49,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:49,517 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:49,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 21:01:49,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:49,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 21:01:49,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-02 21:01:49,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:01:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-02 21:01:49,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:49,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724050341] [2022-11-02 21:01:49,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:01:49,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561418417] [2022-11-02 21:01:49,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561418417] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:01:49,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:01:49,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-02 21:01:49,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918537478] [2022-11-02 21:01:49,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:49,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:01:49,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:49,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:01:49,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:01:49,793 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:01:50,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:50,466 INFO L93 Difference]: Finished difference Result 125 states and 150 transitions. [2022-11-02 21:01:50,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:01:50,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-11-02 21:01:50,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:50,468 INFO L225 Difference]: With dead ends: 125 [2022-11-02 21:01:50,468 INFO L226 Difference]: Without dead ends: 121 [2022-11-02 21:01:50,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:01:50,469 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:50,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 87 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 21:01:50,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-02 21:01:50,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-11-02 21:01:50,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 80 states have internal predecessors, (91), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-02 21:01:50,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2022-11-02 21:01:50,491 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 36 [2022-11-02 21:01:50,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:50,492 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2022-11-02 21:01:50,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:01:50,492 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2022-11-02 21:01:50,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-02 21:01:50,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:50,494 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:50,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:50,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:50,705 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:50,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:50,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1605675221, now seen corresponding path program 1 times [2022-11-02 21:01:50,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:50,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304322998] [2022-11-02 21:01:50,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:50,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:50,715 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:01:50,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138833741] [2022-11-02 21:01:50,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:50,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:50,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:50,717 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:50,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 21:01:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:50,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:01:50,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:50,873 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 21:01:50,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:01:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-02 21:01:50,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:50,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304322998] [2022-11-02 21:01:50,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:01:50,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138833741] [2022-11-02 21:01:50,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138833741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:01:50,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:01:50,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-11-02 21:01:50,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180506360] [2022-11-02 21:01:50,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:01:50,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:01:50,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:50,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:01:50,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:01:50,963 INFO L87 Difference]: Start difference. First operand 118 states and 139 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-02 21:01:51,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:51,245 INFO L93 Difference]: Finished difference Result 241 states and 294 transitions. [2022-11-02 21:01:51,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 21:01:51,250 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2022-11-02 21:01:51,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:51,257 INFO L225 Difference]: With dead ends: 241 [2022-11-02 21:01:51,258 INFO L226 Difference]: Without dead ends: 220 [2022-11-02 21:01:51,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:01:51,261 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 116 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:51,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 258 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:01:51,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-02 21:01:51,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 213. [2022-11-02 21:01:51,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 138 states have (on average 1.1956521739130435) internal successors, (165), 147 states have internal predecessors, (165), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2022-11-02 21:01:51,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 259 transitions. [2022-11-02 21:01:51,326 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 259 transitions. Word has length 49 [2022-11-02 21:01:51,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:51,327 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 259 transitions. [2022-11-02 21:01:51,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-02 21:01:51,327 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 259 transitions. [2022-11-02 21:01:51,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-02 21:01:51,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:51,329 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:51,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:51,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:51,553 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:51,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:51,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1800695307, now seen corresponding path program 1 times [2022-11-02 21:01:51,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:51,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318057019] [2022-11-02 21:01:51,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:51,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:51,566 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:01:51,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398717199] [2022-11-02 21:01:51,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:51,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:51,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:51,574 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:51,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 21:01:51,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:51,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 21:01:51,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-02 21:01:51,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:01:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-02 21:01:53,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:53,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318057019] [2022-11-02 21:01:53,704 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:01:53,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398717199] [2022-11-02 21:01:53,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398717199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:01:53,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:01:53,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-11-02 21:01:53,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217577731] [2022-11-02 21:01:53,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:01:53,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:01:53,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:53,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:01:53,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:01:53,707 INFO L87 Difference]: Start difference. First operand 213 states and 259 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-02 21:01:56,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:56,638 INFO L93 Difference]: Finished difference Result 367 states and 475 transitions. [2022-11-02 21:01:56,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:01:56,639 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 58 [2022-11-02 21:01:56,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:56,651 INFO L225 Difference]: With dead ends: 367 [2022-11-02 21:01:56,652 INFO L226 Difference]: Without dead ends: 299 [2022-11-02 21:01:56,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-02 21:01:56,655 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 50 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:56,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 169 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 21:01:56,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-02 21:01:56,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 270. [2022-11-02 21:01:56,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 184 states have (on average 1.233695652173913) internal successors, (227), 190 states have internal predecessors, (227), 56 states have call successors, (56), 29 states have call predecessors, (56), 29 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-02 21:01:56,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 337 transitions. [2022-11-02 21:01:56,773 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 337 transitions. Word has length 58 [2022-11-02 21:01:56,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:56,773 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 337 transitions. [2022-11-02 21:01:56,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-02 21:01:56,774 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 337 transitions. [2022-11-02 21:01:56,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-02 21:01:56,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:56,776 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:56,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:56,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 21:01:56,990 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:56,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:56,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1688778742, now seen corresponding path program 1 times [2022-11-02 21:01:56,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:56,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710372046] [2022-11-02 21:01:56,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:56,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:56,999 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:01:57,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272953000] [2022-11-02 21:01:57,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:57,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:57,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:57,003 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:57,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 21:01:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:57,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-02 21:01:57,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-02 21:01:57,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:01:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-11-02 21:01:57,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:57,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710372046] [2022-11-02 21:01:57,821 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:01:57,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272953000] [2022-11-02 21:01:57,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272953000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:01:57,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:01:57,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-11-02 21:01:57,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003335909] [2022-11-02 21:01:57,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:01:57,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 21:01:57,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:57,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 21:01:57,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-02 21:01:57,826 INFO L87 Difference]: Start difference. First operand 270 states and 337 transitions. Second operand has 16 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-11-02 21:01:58,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:58,529 INFO L93 Difference]: Finished difference Result 331 states and 412 transitions. [2022-11-02 21:01:58,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 21:01:58,530 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 69 [2022-11-02 21:01:58,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:58,535 INFO L225 Difference]: With dead ends: 331 [2022-11-02 21:01:58,535 INFO L226 Difference]: Without dead ends: 235 [2022-11-02 21:01:58,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-11-02 21:01:58,536 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 55 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:58,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 125 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 21:01:58,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-02 21:01:58,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 219. [2022-11-02 21:01:58,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 149 states have (on average 1.1946308724832215) internal successors, (178), 153 states have internal predecessors, (178), 43 states have call successors, (43), 27 states have call predecessors, (43), 26 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-11-02 21:01:58,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 262 transitions. [2022-11-02 21:01:58,615 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 262 transitions. Word has length 69 [2022-11-02 21:01:58,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:58,617 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 262 transitions. [2022-11-02 21:01:58,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-11-02 21:01:58,618 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 262 transitions. [2022-11-02 21:01:58,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-02 21:01:58,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:58,626 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:58,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:58,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 21:01:58,851 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:58,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:58,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1687889621, now seen corresponding path program 1 times [2022-11-02 21:01:58,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:58,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779388191] [2022-11-02 21:01:58,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:58,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:58,860 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:01:58,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63305969] [2022-11-02 21:01:58,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:58,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:58,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:58,863 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:58,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 21:01:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:58,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:01:58,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-11-02 21:01:59,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:59,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:59,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779388191] [2022-11-02 21:01:59,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:01:59,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63305969] [2022-11-02 21:01:59,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63305969] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:59,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:59,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:01:59,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953291349] [2022-11-02 21:01:59,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:59,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:01:59,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:59,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:01:59,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:01:59,021 INFO L87 Difference]: Start difference. First operand 219 states and 262 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-02 21:01:59,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:59,159 INFO L93 Difference]: Finished difference Result 238 states and 285 transitions. [2022-11-02 21:01:59,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:01:59,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 78 [2022-11-02 21:01:59,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:59,161 INFO L225 Difference]: With dead ends: 238 [2022-11-02 21:01:59,162 INFO L226 Difference]: Without dead ends: 218 [2022-11-02 21:01:59,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:01:59,163 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 17 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:59,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 99 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:01:59,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-11-02 21:01:59,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 213. [2022-11-02 21:01:59,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 146 states have (on average 1.1643835616438356) internal successors, (170), 148 states have internal predecessors, (170), 41 states have call successors, (41), 25 states have call predecessors, (41), 25 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-02 21:01:59,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 251 transitions. [2022-11-02 21:01:59,228 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 251 transitions. Word has length 78 [2022-11-02 21:01:59,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:59,229 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 251 transitions. [2022-11-02 21:01:59,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-02 21:01:59,229 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 251 transitions. [2022-11-02 21:01:59,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-02 21:01:59,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:59,231 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-02 21:01:59,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:59,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 21:01:59,455 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:59,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:59,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1611798954, now seen corresponding path program 2 times [2022-11-02 21:01:59,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:59,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115545217] [2022-11-02 21:01:59,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:59,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:59,465 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:01:59,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481041940] [2022-11-02 21:01:59,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:01:59,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:59,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:59,467 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:59,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 21:01:59,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:01:59,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:01:59,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-02 21:01:59,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-11-02 21:02:00,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:43,999 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-11-02 21:02:43,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:44,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115545217] [2022-11-02 21:02:44,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:02:44,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481041940] [2022-11-02 21:02:44,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481041940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:02:44,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:02:44,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-11-02 21:02:44,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321942296] [2022-11-02 21:02:44,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:44,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 21:02:44,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:44,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 21:02:44,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=179, Unknown=1, NotChecked=0, Total=240 [2022-11-02 21:02:44,002 INFO L87 Difference]: Start difference. First operand 213 states and 251 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 10 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-02 21:03:13,802 WARN L234 SmtUtils]: Spent 28.53s on a formula simplification. DAG size of input: 166 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 21:03:18,600 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 [] [2022-11-02 21:03:19,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 21:03:21,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 21:03:26,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 21:03:29,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 21:03:31,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 21:03:34,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 21:03:34,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:34,205 INFO L93 Difference]: Finished difference Result 328 states and 430 transitions. [2022-11-02 21:03:34,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 21:03:34,205 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 10 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 90 [2022-11-02 21:03:34,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:34,208 INFO L225 Difference]: With dead ends: 328 [2022-11-02 21:03:34,208 INFO L226 Difference]: Without dead ends: 271 [2022-11-02 21:03:34,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 161 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=114, Invalid=305, Unknown=1, NotChecked=0, Total=420 [2022-11-02 21:03:34,209 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 130 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 204 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:34,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 326 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 742 Invalid, 3 Unknown, 0 Unchecked, 19.3s Time] [2022-11-02 21:03:34,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-11-02 21:03:34,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 253. [2022-11-02 21:03:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 171 states have (on average 1.2280701754385965) internal successors, (210), 176 states have internal predecessors, (210), 55 states have call successors, (55), 26 states have call predecessors, (55), 26 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-02 21:03:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 319 transitions. [2022-11-02 21:03:34,333 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 319 transitions. Word has length 90 [2022-11-02 21:03:34,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:34,335 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 319 transitions. [2022-11-02 21:03:34,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 10 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-02 21:03:34,335 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 319 transitions. [2022-11-02 21:03:34,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-02 21:03:34,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:34,337 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:34,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:34,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:34,553 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:34,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:34,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1991126182, now seen corresponding path program 1 times [2022-11-02 21:03:34,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:03:34,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55415256] [2022-11-02 21:03:34,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:34,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:03:34,567 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:03:34,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282602448] [2022-11-02 21:03:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:34,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:34,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:03:34,569 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:03:34,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 21:03:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:34,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 21:03:34,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-02 21:03:34,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-11-02 21:03:34,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:03:34,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55415256] [2022-11-02 21:03:34,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:03:34,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282602448] [2022-11-02 21:03:34,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282602448] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:34,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:34,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-02 21:03:34,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527490357] [2022-11-02 21:03:34,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:34,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 21:03:34,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:03:34,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 21:03:34,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-02 21:03:34,980 INFO L87 Difference]: Start difference. First operand 253 states and 319 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-11-02 21:03:35,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:35,686 INFO L93 Difference]: Finished difference Result 742 states and 1012 transitions. [2022-11-02 21:03:35,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:03:35,687 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 96 [2022-11-02 21:03:35,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:35,691 INFO L225 Difference]: With dead ends: 742 [2022-11-02 21:03:35,691 INFO L226 Difference]: Without dead ends: 655 [2022-11-02 21:03:35,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-11-02 21:03:35,693 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 186 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:35,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 381 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:03:35,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-11-02 21:03:35,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 548. [2022-11-02 21:03:35,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 360 states have (on average 1.2833333333333334) internal successors, (462), 377 states have internal predecessors, (462), 134 states have call successors, (134), 54 states have call predecessors, (134), 53 states have return successors, (130), 116 states have call predecessors, (130), 130 states have call successors, (130) [2022-11-02 21:03:35,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 726 transitions. [2022-11-02 21:03:35,921 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 726 transitions. Word has length 96 [2022-11-02 21:03:35,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:35,922 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 726 transitions. [2022-11-02 21:03:35,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-11-02 21:03:35,922 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 726 transitions. [2022-11-02 21:03:35,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-02 21:03:35,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:35,924 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:35,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:36,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:36,145 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:36,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:36,145 INFO L85 PathProgramCache]: Analyzing trace with hash -402850320, now seen corresponding path program 1 times [2022-11-02 21:03:36,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:03:36,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617116035] [2022-11-02 21:03:36,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:36,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:03:36,157 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:03:36,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740033691] [2022-11-02 21:03:36,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:36,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:36,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:03:36,159 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:03:36,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 21:03:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:36,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 21:03:36,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-02 21:03:36,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-02 21:03:36,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:03:36,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617116035] [2022-11-02 21:03:36,642 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:03:36,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740033691] [2022-11-02 21:03:36,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740033691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:36,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:36,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-11-02 21:03:36,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506557950] [2022-11-02 21:03:36,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:36,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 21:03:36,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:03:36,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 21:03:36,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-02 21:03:36,645 INFO L87 Difference]: Start difference. First operand 548 states and 726 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 10 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-11-02 21:03:37,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:37,347 INFO L93 Difference]: Finished difference Result 700 states and 939 transitions. [2022-11-02 21:03:37,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-02 21:03:37,347 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 10 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 104 [2022-11-02 21:03:37,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:37,351 INFO L225 Difference]: With dead ends: 700 [2022-11-02 21:03:37,352 INFO L226 Difference]: Without dead ends: 663 [2022-11-02 21:03:37,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 190 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2022-11-02 21:03:37,356 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 147 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:37,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 342 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:03:37,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-11-02 21:03:37,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 647. [2022-11-02 21:03:37,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 438 states have (on average 1.2283105022831051) internal successors, (538), 451 states have internal predecessors, (538), 153 states have call successors, (153), 56 states have call predecessors, (153), 55 states have return successors, (149), 139 states have call predecessors, (149), 149 states have call successors, (149) [2022-11-02 21:03:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 840 transitions. [2022-11-02 21:03:37,656 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 840 transitions. Word has length 104 [2022-11-02 21:03:37,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:37,657 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 840 transitions. [2022-11-02 21:03:37,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 10 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-11-02 21:03:37,657 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 840 transitions. [2022-11-02 21:03:37,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-02 21:03:37,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:37,660 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:37,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:37,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 21:03:37,881 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:37,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:37,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1040094269, now seen corresponding path program 1 times [2022-11-02 21:03:37,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:03:37,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603042954] [2022-11-02 21:03:37,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:37,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:03:37,889 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:03:37,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259362461] [2022-11-02 21:03:37,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:37,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:37,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:03:37,891 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:03:37,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 21:03:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:37,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:03:37,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:38,182 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-11-02 21:03:38,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-11-02 21:03:39,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:03:39,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603042954] [2022-11-02 21:03:39,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:03:39,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259362461] [2022-11-02 21:03:39,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259362461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:39,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:39,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-11-02 21:03:39,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981776750] [2022-11-02 21:03:39,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:39,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:03:39,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:03:39,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:03:39,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:03:39,347 INFO L87 Difference]: Start difference. First operand 647 states and 840 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 6 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-11-02 21:03:39,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:39,980 INFO L93 Difference]: Finished difference Result 653 states and 846 transitions. [2022-11-02 21:03:39,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:03:39,981 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 6 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) Word has length 106 [2022-11-02 21:03:39,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:39,985 INFO L225 Difference]: With dead ends: 653 [2022-11-02 21:03:39,985 INFO L226 Difference]: Without dead ends: 647 [2022-11-02 21:03:39,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 199 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:03:39,986 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 2 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:39,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 296 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:03:39,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-11-02 21:03:40,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2022-11-02 21:03:40,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 438 states have (on average 1.2237442922374429) internal successors, (536), 451 states have internal predecessors, (536), 153 states have call successors, (153), 56 states have call predecessors, (153), 55 states have return successors, (149), 139 states have call predecessors, (149), 149 states have call successors, (149) [2022-11-02 21:03:40,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 838 transitions. [2022-11-02 21:03:40,274 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 838 transitions. Word has length 106 [2022-11-02 21:03:40,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:40,274 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 838 transitions. [2022-11-02 21:03:40,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 6 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-11-02 21:03:40,275 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 838 transitions. [2022-11-02 21:03:40,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-02 21:03:40,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:40,279 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:40,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:40,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 21:03:40,493 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:40,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:40,493 INFO L85 PathProgramCache]: Analyzing trace with hash 146904463, now seen corresponding path program 2 times [2022-11-02 21:03:40,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:03:40,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343647212] [2022-11-02 21:03:40,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:40,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:03:40,511 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:03:40,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966251366] [2022-11-02 21:03:40,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:03:40,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:40,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:03:40,515 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:03:40,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 21:03:40,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:03:40,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:03:40,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 21:03:40,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 102 proven. 51 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-11-02 21:03:40,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 69 proven. 18 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-11-02 21:03:40,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:03:40,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343647212] [2022-11-02 21:03:40,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:03:40,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966251366] [2022-11-02 21:03:40,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966251366] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:40,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:40,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-11-02 21:03:40,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391041073] [2022-11-02 21:03:40,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:40,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:03:40,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:03:40,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:03:40,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:03:40,978 INFO L87 Difference]: Start difference. First operand 647 states and 838 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 8 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) [2022-11-02 21:03:41,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:41,346 INFO L93 Difference]: Finished difference Result 750 states and 965 transitions. [2022-11-02 21:03:41,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:03:41,347 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 8 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) Word has length 120 [2022-11-02 21:03:41,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:41,350 INFO L225 Difference]: With dead ends: 750 [2022-11-02 21:03:41,350 INFO L226 Difference]: Without dead ends: 529 [2022-11-02 21:03:41,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 228 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:03:41,352 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 4 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:41,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 135 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:03:41,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-11-02 21:03:41,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 527. [2022-11-02 21:03:41,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 355 states have (on average 1.1887323943661972) internal successors, (422), 368 states have internal predecessors, (422), 119 states have call successors, (119), 53 states have call predecessors, (119), 52 states have return successors, (115), 105 states have call predecessors, (115), 115 states have call successors, (115) [2022-11-02 21:03:41,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 656 transitions. [2022-11-02 21:03:41,591 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 656 transitions. Word has length 120 [2022-11-02 21:03:41,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:41,591 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 656 transitions. [2022-11-02 21:03:41,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 8 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) [2022-11-02 21:03:41,592 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 656 transitions. [2022-11-02 21:03:41,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-02 21:03:41,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:41,594 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2022-11-02 21:03:41,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:41,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 21:03:41,821 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:41,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:41,822 INFO L85 PathProgramCache]: Analyzing trace with hash -405037921, now seen corresponding path program 3 times [2022-11-02 21:03:41,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:03:41,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343878112] [2022-11-02 21:03:41,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:41,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:03:41,831 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:03:41,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381103372] [2022-11-02 21:03:41,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:03:41,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:41,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:03:41,836 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:03:41,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002af39a-29fb-439c-90a6-110486787907/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 21:03:41,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 21:03:41,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:03:41,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-02 21:03:41,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:42,577 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 145 proven. 32 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2022-11-02 21:03:42,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:05,355 WARN L234 SmtUtils]: Spent 6.20s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)