./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS --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 e98c2efe8dc7dfa25efbae5d9b3e7693444730d8a672856a92fef54f1a5fbcae --- 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-4e7fbc6 [2022-11-23 04:01:58,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 04:01:58,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 04:01:58,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 04:01:58,782 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 04:01:58,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 04:01:58,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 04:01:58,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 04:01:58,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 04:01:58,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 04:01:58,803 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 04:01:58,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 04:01:58,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 04:01:58,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 04:01:58,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 04:01:58,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 04:01:58,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 04:01:58,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 04:01:58,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 04:01:58,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 04:01:58,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 04:01:58,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 04:01:58,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 04:01:58,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 04:01:58,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 04:01:58,849 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 04:01:58,850 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 04:01:58,852 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 04:01:58,853 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 04:01:58,854 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 04:01:58,854 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 04:01:58,855 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 04:01:58,857 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 04:01:58,859 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 04:01:58,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 04:01:58,862 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 04:01:58,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 04:01:58,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 04:01:58,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 04:01:58,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 04:01:58,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 04:01:58,867 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 04:01:58,917 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 04:01:58,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 04:01:58,919 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 04:01:58,919 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 04:01:58,920 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 04:01:58,921 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 04:01:58,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 04:01:58,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 04:01:58,922 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 04:01:58,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 04:01:58,924 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 04:01:58,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 04:01:58,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 04:01:58,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 04:01:58,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 04:01:58,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 04:01:58,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 04:01:58,927 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 04:01:58,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 04:01:58,927 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 04:01:58,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 04:01:58,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 04:01:58,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 04:01:58,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 04:01:58,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 04:01:58,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 04:01:58,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 04:01:58,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 04:01:58,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 04:01:58,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 04:01:58,932 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 04:01:58,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 04:01:58,933 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 04:01:58,933 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 04:01:58,933 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98c2efe8dc7dfa25efbae5d9b3e7693444730d8a672856a92fef54f1a5fbcae [2022-11-23 04:01:59,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 04:01:59,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 04:01:59,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 04:01:59,327 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 04:01:59,328 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 04:01:59,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c [2022-11-23 04:02:02,472 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 04:02:02,701 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 04:02:02,701 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c [2022-11-23 04:02:02,708 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/data/0bb34f4c6/2fbb21a8989a438caaedbe523b086d15/FLAG09cc8b39c [2022-11-23 04:02:02,722 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/data/0bb34f4c6/2fbb21a8989a438caaedbe523b086d15 [2022-11-23 04:02:02,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 04:02:02,727 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 04:02:02,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 04:02:02,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 04:02:02,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 04:02:02,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:02:02" (1/1) ... [2022-11-23 04:02:02,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17113539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:02, skipping insertion in model container [2022-11-23 04:02:02,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:02:02" (1/1) ... [2022-11-23 04:02:02,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 04:02:02,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 04:02:02,887 WARN L237 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_01c9667a-9eb0-4b3a-813f-16250bd1c47f/sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c[331,344] [2022-11-23 04:02:02,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 04:02:02,917 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 04:02:02,929 WARN L237 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_01c9667a-9eb0-4b3a-813f-16250bd1c47f/sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c[331,344] [2022-11-23 04:02:02,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 04:02:02,952 INFO L208 MainTranslator]: Completed translation [2022-11-23 04:02:02,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:02 WrapperNode [2022-11-23 04:02:02,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 04:02:02,954 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 04:02:02,954 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 04:02:02,954 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 04:02:02,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:02" (1/1) ... [2022-11-23 04:02:02,966 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:02" (1/1) ... [2022-11-23 04:02:03,003 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2022-11-23 04:02:03,004 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 04:02:03,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 04:02:03,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 04:02:03,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 04:02:03,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:02" (1/1) ... [2022-11-23 04:02:03,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:02" (1/1) ... [2022-11-23 04:02:03,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:02" (1/1) ... [2022-11-23 04:02:03,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:02" (1/1) ... [2022-11-23 04:02:03,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:02" (1/1) ... [2022-11-23 04:02:03,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:02" (1/1) ... [2022-11-23 04:02:03,027 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:02" (1/1) ... [2022-11-23 04:02:03,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:02" (1/1) ... [2022-11-23 04:02:03,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 04:02:03,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 04:02:03,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 04:02:03,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 04:02:03,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:02" (1/1) ... [2022-11-23 04:02:03,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 04:02:03,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:02:03,066 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 04:02:03,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 04:02:03,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 04:02:03,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 04:02:03,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 04:02:03,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 04:02:03,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 04:02:03,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 04:02:03,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 04:02:03,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 04:02:03,192 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 04:02:03,195 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 04:02:03,454 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 04:02:03,460 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 04:02:03,474 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 04:02:03,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:02:03 BoogieIcfgContainer [2022-11-23 04:02:03,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 04:02:03,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 04:02:03,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 04:02:03,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 04:02:03,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:02:02" (1/3) ... [2022-11-23 04:02:03,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1876117d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:02:03, skipping insertion in model container [2022-11-23 04:02:03,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:02:02" (2/3) ... [2022-11-23 04:02:03,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1876117d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:02:03, skipping insertion in model container [2022-11-23 04:02:03,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:02:03" (3/3) ... [2022-11-23 04:02:03,499 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_3.c [2022-11-23 04:02:03,528 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 04:02:03,528 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 04:02:03,581 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 04:02:03,587 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;@673ad595, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 04:02:03,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 04:02:03,591 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:03,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 04:02:03,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 04:02:03,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:03,597 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 04:02:03,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:02:03,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2022-11-23 04:02:03,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:02:03,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257328463] [2022-11-23 04:02:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:03,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:02:03,711 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 04:02:03,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667822083] [2022-11-23 04:02:03,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:03,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:03,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:02:03,716 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:02:03,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 04:02:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:02:03,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-23 04:02:03,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:02:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:03,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 04:02:03,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:02:03,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257328463] [2022-11-23 04:02:03,901 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 04:02:03,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667822083] [2022-11-23 04:02:03,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667822083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:02:03,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:02:03,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 04:02:03,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585031205] [2022-11-23 04:02:03,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:02:03,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 04:02:03,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:02:03,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 04:02:03,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 04:02:03,955 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:03,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 04:02:03,969 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-11-23 04:02:03,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 04:02:03,972 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 04:02:03,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 04:02:03,979 INFO L225 Difference]: With dead ends: 41 [2022-11-23 04:02:03,979 INFO L226 Difference]: Without dead ends: 18 [2022-11-23 04:02:03,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 04:02:03,987 INFO L413 NwaCegarLoop]: 26 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, 26 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 [2022-11-23 04:02:03,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 04:02:04,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-23 04:02:04,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-23 04:02:04,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:04,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-11-23 04:02:04,021 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2022-11-23 04:02:04,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 04:02:04,021 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-11-23 04:02:04,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:04,022 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-11-23 04:02:04,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 04:02:04,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 04:02:04,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:04,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 04:02:04,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-23 04:02:04,224 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 04:02:04,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:02:04,224 INFO L85 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2022-11-23 04:02:04,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:02:04,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643267922] [2022-11-23 04:02:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:04,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:02:04,255 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 04:02:04,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991495519] [2022-11-23 04:02:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:04,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:04,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:02:04,258 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:02:04,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 04:02:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:02:04,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 04:02:04,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:02:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:04,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 04:02:04,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:02:04,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643267922] [2022-11-23 04:02:04,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 04:02:04,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991495519] [2022-11-23 04:02:04,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991495519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:02:04,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:02:04,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 04:02:04,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694757998] [2022-11-23 04:02:04,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:02:04,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 04:02:04,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:02:04,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 04:02:04,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 04:02:04,409 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:04,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 04:02:04,464 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2022-11-23 04:02:04,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 04:02:04,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 04:02:04,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 04:02:04,466 INFO L225 Difference]: With dead ends: 45 [2022-11-23 04:02:04,467 INFO L226 Difference]: Without dead ends: 31 [2022-11-23 04:02:04,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 04:02:04,469 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 04:02:04,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 21 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 04:02:04,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-23 04:02:04,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2022-11-23 04:02:04,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:04,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-11-23 04:02:04,476 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2022-11-23 04:02:04,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 04:02:04,476 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-11-23 04:02:04,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:04,477 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-11-23 04:02:04,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 04:02:04,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 04:02:04,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:04,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 04:02:04,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:04,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 04:02:04,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:02:04,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1485448361, now seen corresponding path program 1 times [2022-11-23 04:02:04,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:02:04,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248092252] [2022-11-23 04:02:04,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:04,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:02:04,736 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 04:02:04,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369045550] [2022-11-23 04:02:04,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:04,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:04,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:02:04,740 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:02:04,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 04:02:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:02:04,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 04:02:04,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:02:04,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:04,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:02:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:05,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:02:05,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248092252] [2022-11-23 04:02:05,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 04:02:05,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369045550] [2022-11-23 04:02:05,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369045550] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:02:05,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 04:02:05,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-23 04:02:05,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17605974] [2022-11-23 04:02:05,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 04:02:05,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 04:02:05,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:02:05,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 04:02:05,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-23 04:02:05,014 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:05,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 04:02:05,171 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2022-11-23 04:02:05,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 04:02:05,172 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-23 04:02:05,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 04:02:05,173 INFO L225 Difference]: With dead ends: 73 [2022-11-23 04:02:05,174 INFO L226 Difference]: Without dead ends: 59 [2022-11-23 04:02:05,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-23 04:02:05,176 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 186 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 04:02:05,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 38 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 04:02:05,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-23 04:02:05,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2022-11-23 04:02:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-11-23 04:02:05,184 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 16 [2022-11-23 04:02:05,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 04:02:05,185 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-11-23 04:02:05,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:05,186 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-11-23 04:02:05,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-23 04:02:05,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 04:02:05,187 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:05,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 04:02:05,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:05,394 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 04:02:05,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:02:05,394 INFO L85 PathProgramCache]: Analyzing trace with hash -35725226, now seen corresponding path program 1 times [2022-11-23 04:02:05,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:02:05,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704002266] [2022-11-23 04:02:05,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:05,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:02:05,420 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 04:02:05,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971849750] [2022-11-23 04:02:05,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:05,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:05,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:02:05,423 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:02:05,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 04:02:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:02:05,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 04:02:05,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:02:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:05,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:02:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:05,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:02:05,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704002266] [2022-11-23 04:02:05,906 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 04:02:05,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971849750] [2022-11-23 04:02:05,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971849750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:02:05,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 04:02:05,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-23 04:02:05,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134197384] [2022-11-23 04:02:05,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 04:02:05,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 04:02:05,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:02:05,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 04:02:05,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-11-23 04:02:05,909 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:06,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 04:02:06,208 INFO L93 Difference]: Finished difference Result 155 states and 195 transitions. [2022-11-23 04:02:06,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 04:02:06,209 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-23 04:02:06,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 04:02:06,210 INFO L225 Difference]: With dead ends: 155 [2022-11-23 04:02:06,211 INFO L226 Difference]: Without dead ends: 137 [2022-11-23 04:02:06,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-11-23 04:02:06,217 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 351 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 04:02:06,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 87 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 04:02:06,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-23 04:02:06,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 64. [2022-11-23 04:02:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 63 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:06,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-11-23 04:02:06,230 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 31 [2022-11-23 04:02:06,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 04:02:06,234 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-11-23 04:02:06,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:06,237 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-11-23 04:02:06,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 04:02:06,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 04:02:06,242 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:06,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 04:02:06,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-23 04:02:06,448 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 04:02:06,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:02:06,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1147663820, now seen corresponding path program 2 times [2022-11-23 04:02:06,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:02:06,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863894455] [2022-11-23 04:02:06,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:06,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:02:06,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 04:02:06,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [404210792] [2022-11-23 04:02:06,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 04:02:06,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:06,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:02:06,497 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:02:06,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 04:02:06,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 04:02:06,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:02:06,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 04:02:06,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:02:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-11-23 04:02:07,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 04:02:07,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:02:07,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863894455] [2022-11-23 04:02:07,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 04:02:07,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404210792] [2022-11-23 04:02:07,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404210792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:02:07,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:02:07,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 04:02:07,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162066854] [2022-11-23 04:02:07,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:02:07,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 04:02:07,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:02:07,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 04:02:07,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-23 04:02:07,215 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:07,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 04:02:07,307 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-11-23 04:02:07,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 04:02:07,308 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-23 04:02:07,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 04:02:07,309 INFO L225 Difference]: With dead ends: 76 [2022-11-23 04:02:07,309 INFO L226 Difference]: Without dead ends: 74 [2022-11-23 04:02:07,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-23 04:02:07,311 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 04:02:07,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 30 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 04:02:07,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-23 04:02:07,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2022-11-23 04:02:07,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 69 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:07,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2022-11-23 04:02:07,323 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 61 [2022-11-23 04:02:07,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 04:02:07,324 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2022-11-23 04:02:07,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:07,324 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2022-11-23 04:02:07,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 04:02:07,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 04:02:07,325 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:07,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 04:02:07,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:07,532 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 04:02:07,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:02:07,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1147723402, now seen corresponding path program 1 times [2022-11-23 04:02:07,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:02:07,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808827559] [2022-11-23 04:02:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:07,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:02:07,558 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 04:02:07,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814064443] [2022-11-23 04:02:07,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:07,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:07,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:02:07,560 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:02:07,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 04:02:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:02:07,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 04:02:07,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:02:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:08,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:02:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:08,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:02:08,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808827559] [2022-11-23 04:02:08,402 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 04:02:08,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814064443] [2022-11-23 04:02:08,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814064443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:02:08,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 04:02:08,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-11-23 04:02:08,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028878818] [2022-11-23 04:02:08,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 04:02:08,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 04:02:08,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:02:08,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 04:02:08,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-11-23 04:02:08,404 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 25 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:09,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 04:02:09,126 INFO L93 Difference]: Finished difference Result 463 states and 570 transitions. [2022-11-23 04:02:09,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 04:02:09,127 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 25 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-23 04:02:09,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 04:02:09,133 INFO L225 Difference]: With dead ends: 463 [2022-11-23 04:02:09,133 INFO L226 Difference]: Without dead ends: 424 [2022-11-23 04:02:09,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-11-23 04:02:09,136 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 983 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 04:02:09,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 184 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 04:02:09,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-11-23 04:02:09,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 130. [2022-11-23 04:02:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.2868217054263567) internal successors, (166), 129 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:09,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 166 transitions. [2022-11-23 04:02:09,187 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 166 transitions. Word has length 61 [2022-11-23 04:02:09,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 04:02:09,191 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 166 transitions. [2022-11-23 04:02:09,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 25 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:09,192 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 166 transitions. [2022-11-23 04:02:09,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-23 04:02:09,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 04:02:09,199 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:09,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 04:02:09,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:09,405 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 04:02:09,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:02:09,406 INFO L85 PathProgramCache]: Analyzing trace with hash 4942966, now seen corresponding path program 2 times [2022-11-23 04:02:09,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:02:09,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173365338] [2022-11-23 04:02:09,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:09,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:02:09,450 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 04:02:09,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530939004] [2022-11-23 04:02:09,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 04:02:09,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:09,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:02:09,452 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:02:09,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 04:02:09,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 04:02:09,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:02:09,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 04:02:09,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:02:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2022-11-23 04:02:10,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 04:02:10,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:02:10,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173365338] [2022-11-23 04:02:10,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 04:02:10,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530939004] [2022-11-23 04:02:10,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530939004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:02:10,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:02:10,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 04:02:10,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373879732] [2022-11-23 04:02:10,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:02:10,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 04:02:10,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:02:10,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 04:02:10,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 04:02:10,464 INFO L87 Difference]: Start difference. First operand 130 states and 166 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:10,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 04:02:10,577 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2022-11-23 04:02:10,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 04:02:10,578 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-11-23 04:02:10,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 04:02:10,579 INFO L225 Difference]: With dead ends: 143 [2022-11-23 04:02:10,579 INFO L226 Difference]: Without dead ends: 141 [2022-11-23 04:02:10,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-23 04:02:10,580 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 77 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 04:02:10,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 44 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 04:02:10,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-23 04:02:10,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2022-11-23 04:02:10,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.2814814814814814) internal successors, (173), 135 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:10,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 173 transitions. [2022-11-23 04:02:10,597 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 173 transitions. Word has length 121 [2022-11-23 04:02:10,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 04:02:10,598 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 173 transitions. [2022-11-23 04:02:10,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:10,598 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 173 transitions. [2022-11-23 04:02:10,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-23 04:02:10,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 04:02:10,599 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:10,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 04:02:10,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 04:02:10,805 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 04:02:10,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:02:10,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1531894057, now seen corresponding path program 1 times [2022-11-23 04:02:10,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:02:10,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806783169] [2022-11-23 04:02:10,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:10,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:02:10,843 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 04:02:10,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616418166] [2022-11-23 04:02:10,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:10,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:10,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:02:10,845 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:02:10,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 04:02:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:02:11,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 04:02:11,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:02:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 04:02:11,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:02:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 04:02:12,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:02:12,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806783169] [2022-11-23 04:02:12,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 04:02:12,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616418166] [2022-11-23 04:02:12,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616418166] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:02:12,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 04:02:12,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2022-11-23 04:02:12,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144527578] [2022-11-23 04:02:12,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 04:02:12,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-23 04:02:12,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:02:12,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-23 04:02:12,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-11-23 04:02:12,937 INFO L87 Difference]: Start difference. First operand 136 states and 173 transitions. Second operand has 50 states, 50 states have (on average 4.78) internal successors, (239), 49 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:15,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 04:02:15,247 INFO L93 Difference]: Finished difference Result 1222 states and 1488 transitions. [2022-11-23 04:02:15,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-23 04:02:15,247 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.78) internal successors, (239), 49 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-11-23 04:02:15,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 04:02:15,251 INFO L225 Difference]: With dead ends: 1222 [2022-11-23 04:02:15,251 INFO L226 Difference]: Without dead ends: 1147 [2022-11-23 04:02:15,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-11-23 04:02:15,255 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2733 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2733 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 04:02:15,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2733 Valid, 374 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 04:02:15,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-11-23 04:02:15,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 256. [2022-11-23 04:02:15,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.2901960784313726) internal successors, (329), 255 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:15,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 329 transitions. [2022-11-23 04:02:15,282 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 329 transitions. Word has length 127 [2022-11-23 04:02:15,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 04:02:15,283 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 329 transitions. [2022-11-23 04:02:15,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.78) internal successors, (239), 49 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:15,283 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 329 transitions. [2022-11-23 04:02:15,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-11-23 04:02:15,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 04:02:15,286 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:15,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 04:02:15,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:15,493 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 04:02:15,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:02:15,494 INFO L85 PathProgramCache]: Analyzing trace with hash -456351959, now seen corresponding path program 2 times [2022-11-23 04:02:15,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:02:15,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753538991] [2022-11-23 04:02:15,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:15,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:02:15,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 04:02:15,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632196371] [2022-11-23 04:02:15,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 04:02:15,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:15,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:02:15,554 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:02:15,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 04:02:15,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:02:15,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:02:15,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-23 04:02:15,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:02:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5225 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 04:02:18,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:02:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5225 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 04:02:21,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:02:21,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753538991] [2022-11-23 04:02:21,275 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 04:02:21,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632196371] [2022-11-23 04:02:21,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632196371] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:02:21,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 04:02:21,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2022-11-23 04:02:21,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198043452] [2022-11-23 04:02:21,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 04:02:21,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-23 04:02:21,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:02:21,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-23 04:02:21,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-11-23 04:02:21,283 INFO L87 Difference]: Start difference. First operand 256 states and 329 transitions. Second operand has 98 states, 98 states have (on average 4.887755102040816) internal successors, (479), 97 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:30,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 04:02:30,379 INFO L93 Difference]: Finished difference Result 2482 states and 3024 transitions. [2022-11-23 04:02:30,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-23 04:02:30,380 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 4.887755102040816) internal successors, (479), 97 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 247 [2022-11-23 04:02:30,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 04:02:30,387 INFO L225 Difference]: With dead ends: 2482 [2022-11-23 04:02:30,387 INFO L226 Difference]: Without dead ends: 2347 [2022-11-23 04:02:30,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2022-11-23 04:02:30,393 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5623 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5623 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 04:02:30,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5623 Valid, 762 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 04:02:30,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2022-11-23 04:02:30,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 496. [2022-11-23 04:02:30,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 1.2949494949494949) internal successors, (641), 495 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:30,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 641 transitions. [2022-11-23 04:02:30,434 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 641 transitions. Word has length 247 [2022-11-23 04:02:30,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 04:02:30,435 INFO L495 AbstractCegarLoop]: Abstraction has 496 states and 641 transitions. [2022-11-23 04:02:30,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 4.887755102040816) internal successors, (479), 97 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:30,435 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 641 transitions. [2022-11-23 04:02:30,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2022-11-23 04:02:30,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 04:02:30,445 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:30,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 04:02:30,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:30,655 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 04:02:30,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:02:30,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1703865129, now seen corresponding path program 3 times [2022-11-23 04:02:30,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:02:30,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109810603] [2022-11-23 04:02:30,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:30,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:02:30,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 04:02:30,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801436479] [2022-11-23 04:02:30,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 04:02:30,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:30,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:02:30,763 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:02:30,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 04:02:31,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 04:02:31,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:02:31,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 04:02:31,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:02:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21953 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21949 trivial. 0 not checked. [2022-11-23 04:02:33,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:02:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 21953 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21949 trivial. 0 not checked. [2022-11-23 04:02:50,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:02:50,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109810603] [2022-11-23 04:02:50,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 04:02:50,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801436479] [2022-11-23 04:02:50,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801436479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:02:50,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 04:02:50,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-23 04:02:50,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512987212] [2022-11-23 04:02:50,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 04:02:50,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 04:02:50,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:02:50,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 04:02:50,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-23 04:02:50,739 INFO L87 Difference]: Start difference. First operand 496 states and 641 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:52,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 04:02:52,601 INFO L93 Difference]: Finished difference Result 527 states and 680 transitions. [2022-11-23 04:02:52,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 04:02:52,602 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 487 [2022-11-23 04:02:52,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 04:02:52,604 INFO L225 Difference]: With dead ends: 527 [2022-11-23 04:02:52,604 INFO L226 Difference]: Without dead ends: 525 [2022-11-23 04:02:52,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 959 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-11-23 04:02:52,605 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 256 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 04:02:52,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 97 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 04:02:52,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-11-23 04:02:52,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 520. [2022-11-23 04:02:52,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 1.2890173410404624) internal successors, (669), 519 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:52,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 669 transitions. [2022-11-23 04:02:52,649 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 669 transitions. Word has length 487 [2022-11-23 04:02:52,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 04:02:52,650 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 669 transitions. [2022-11-23 04:02:52,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:52,651 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 669 transitions. [2022-11-23 04:02:52,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2022-11-23 04:02:52,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 04:02:52,662 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 47, 47, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:52,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 04:02:52,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 04:02:52,868 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 04:02:52,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:02:52,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1887291253, now seen corresponding path program 4 times [2022-11-23 04:02:52,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:02:52,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327561133] [2022-11-23 04:02:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:52,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:02:52,944 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 04:02:52,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071136440] [2022-11-23 04:02:52,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 04:02:52,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:52,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:02:52,946 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:02:52,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 04:02:53,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 04:02:53,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:02:53,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 1342 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 04:02:53,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:02:53,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-23 04:02:53,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 04:02:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 22029 backedges. 831 proven. 4 refuted. 0 times theorem prover too weak. 21194 trivial. 0 not checked. [2022-11-23 04:02:53,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:02:53,577 INFO L134 CoverageAnalysis]: Checked inductivity of 22029 backedges. 831 proven. 4 refuted. 0 times theorem prover too weak. 21194 trivial. 0 not checked. [2022-11-23 04:02:53,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:02:53,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327561133] [2022-11-23 04:02:53,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 04:02:53,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071136440] [2022-11-23 04:02:53,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071136440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:02:53,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 04:02:53,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-23 04:02:53,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776169345] [2022-11-23 04:02:53,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 04:02:53,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 04:02:53,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:02:53,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 04:02:53,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-23 04:02:53,580 INFO L87 Difference]: Start difference. First operand 520 states and 669 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:53,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 04:02:53,867 INFO L93 Difference]: Finished difference Result 1108 states and 1415 transitions. [2022-11-23 04:02:53,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 04:02:53,868 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 511 [2022-11-23 04:02:53,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 04:02:53,870 INFO L225 Difference]: With dead ends: 1108 [2022-11-23 04:02:53,870 INFO L226 Difference]: Without dead ends: 596 [2022-11-23 04:02:53,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 1012 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-23 04:02:53,872 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 04:02:53,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 112 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 04:02:53,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-11-23 04:02:53,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 520. [2022-11-23 04:02:53,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 1.28131021194605) internal successors, (665), 519 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:53,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 665 transitions. [2022-11-23 04:02:53,920 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 665 transitions. Word has length 511 [2022-11-23 04:02:53,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 04:02:53,920 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 665 transitions. [2022-11-23 04:02:53,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:53,920 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 665 transitions. [2022-11-23 04:02:53,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2022-11-23 04:02:53,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 04:02:53,924 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 90, 47, 47, 6, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:53,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 04:02:54,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:54,133 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 04:02:54,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:02:54,133 INFO L85 PathProgramCache]: Analyzing trace with hash 593762805, now seen corresponding path program 1 times [2022-11-23 04:02:54,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:02:54,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473812332] [2022-11-23 04:02:54,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:54,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:02:54,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 04:02:54,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999235704] [2022-11-23 04:02:54,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:54,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:54,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:02:54,241 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:02:54,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 04:02:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:02:54,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 1685 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-23 04:02:54,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:03:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 22029 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-23 04:03:00,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:03:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 22029 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-23 04:03:09,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:03:09,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473812332] [2022-11-23 04:03:09,589 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 04:03:09,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999235704] [2022-11-23 04:03:09,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999235704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:03:09,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 04:03:09,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 193 [2022-11-23 04:03:09,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220941286] [2022-11-23 04:03:09,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 04:03:09,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-11-23 04:03:09,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:03:09,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-11-23 04:03:09,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18531, Invalid=18911, Unknown=0, NotChecked=0, Total=37442 [2022-11-23 04:03:09,606 INFO L87 Difference]: Start difference. First operand 520 states and 665 transitions. Second operand has 194 states, 194 states have (on average 4.943298969072165) internal successors, (959), 193 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:04:19,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 04:04:19,046 INFO L93 Difference]: Finished difference Result 9490 states and 11326 transitions. [2022-11-23 04:04:19,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-11-23 04:04:19,047 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 4.943298969072165) internal successors, (959), 193 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 511 [2022-11-23 04:04:19,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 04:04:19,073 INFO L225 Difference]: With dead ends: 9490 [2022-11-23 04:04:19,073 INFO L226 Difference]: Without dead ends: 9211 [2022-11-23 04:04:19,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1115 GetRequests, 828 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18145 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=36961, Invalid=46271, Unknown=0, NotChecked=0, Total=83232 [2022-11-23 04:04:19,085 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 11385 mSDsluCounter, 1511 mSDsCounter, 0 mSdLazyCounter, 1454 mSolverCounterSat, 994 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11385 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 2448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 994 IncrementalHoareTripleChecker+Valid, 1454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-23 04:04:19,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11385 Valid, 1523 Invalid, 2448 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [994 Valid, 1454 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-11-23 04:04:19,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9211 states. [2022-11-23 04:04:19,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9211 to 1000. [2022-11-23 04:04:19,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 999 states have (on average 1.2902902902902902) internal successors, (1289), 999 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:04:19,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1289 transitions. [2022-11-23 04:04:19,245 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1289 transitions. Word has length 511 [2022-11-23 04:04:19,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 04:04:19,245 INFO L495 AbstractCegarLoop]: Abstraction has 1000 states and 1289 transitions. [2022-11-23 04:04:19,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 4.943298969072165) internal successors, (959), 193 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:04:19,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1289 transitions. [2022-11-23 04:04:19,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 992 [2022-11-23 04:04:19,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 04:04:19,256 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 190, 186, 95, 95, 6, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:04:19,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 04:04:19,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:04:19,466 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 04:04:19,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:04:19,467 INFO L85 PathProgramCache]: Analyzing trace with hash 847622645, now seen corresponding path program 2 times [2022-11-23 04:04:19,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:04:19,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080328784] [2022-11-23 04:04:19,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:04:19,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:04:19,604 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 04:04:19,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259317402] [2022-11-23 04:04:19,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 04:04:19,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:04:19,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:04:19,606 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:04:19,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c9667a-9eb0-4b3a-813f-16250bd1c47f/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 04:04:20,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:04:20,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:04:20,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 3269 conjuncts, 193 conjunts are in the unsatisfiable core [2022-11-23 04:04:20,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:04:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 90045 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-23 04:04:40,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:05:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 90045 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-23 04:05:14,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:05:14,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080328784] [2022-11-23 04:05:14,251 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 04:05:14,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259317402] [2022-11-23 04:05:14,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259317402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:05:14,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 04:05:14,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193] total 385 [2022-11-23 04:05:14,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447081353] [2022-11-23 04:05:14,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 04:05:14,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 386 states [2022-11-23 04:05:14,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:05:14,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 386 interpolants. [2022-11-23 04:05:14,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73923, Invalid=74687, Unknown=0, NotChecked=0, Total=148610 [2022-11-23 04:05:14,284 INFO L87 Difference]: Start difference. First operand 1000 states and 1289 transitions. Second operand has 386 states, 386 states have (on average 4.971502590673575) internal successors, (1919), 385 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)