./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s5if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s5if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b618695aa08df106816e7defd71220f009a5c8c09539ff7c8c29235c85f2ce8d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:28:12,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:28:12,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:28:12,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:28:12,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:28:12,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:28:12,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:28:12,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:28:12,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:28:12,846 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:28:12,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:28:12,848 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:28:12,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:28:12,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:28:12,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:28:12,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:28:12,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:28:12,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:28:12,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:28:12,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:28:12,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:28:12,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:28:12,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:28:12,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:28:12,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:28:12,868 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:28:12,868 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:28:12,869 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:28:12,869 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:28:12,870 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:28:12,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:28:12,871 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:28:12,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:28:12,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:28:12,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:28:12,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:28:12,883 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:28:12,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:28:12,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:28:12,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:28:12,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:28:12,886 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:28:12,924 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:28:12,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:28:12,925 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:28:12,925 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:28:12,926 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:28:12,927 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:28:12,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:28:12,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:28:12,928 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:28:12,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:28:12,929 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:28:12,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:28:12,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:28:12,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:28:12,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:28:12,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:28:12,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:28:12,930 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:28:12,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:28:12,931 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:28:12,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:28:12,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:28:12,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:28:12,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:28:12,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:28:12,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:28:12,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:28:12,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:28:12,934 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:28:12,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:28:12,934 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:28:12,934 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:28:12,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:28:12,935 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b618695aa08df106816e7defd71220f009a5c8c09539ff7c8c29235c85f2ce8d [2022-11-16 11:28:13,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:28:13,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:28:13,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:28:13,326 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:28:13,327 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:28:13,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/array-fpi/s5if.c [2022-11-16 11:28:13,423 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/data/ec9e8dcf8/94959971ebfd4e0e83c18b93850a3c31/FLAGebb6a8b1f [2022-11-16 11:28:13,813 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:28:13,814 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/sv-benchmarks/c/array-fpi/s5if.c [2022-11-16 11:28:13,819 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/data/ec9e8dcf8/94959971ebfd4e0e83c18b93850a3c31/FLAGebb6a8b1f [2022-11-16 11:28:14,223 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/data/ec9e8dcf8/94959971ebfd4e0e83c18b93850a3c31 [2022-11-16 11:28:14,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:28:14,227 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:28:14,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:28:14,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:28:14,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:28:14,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:28:14" (1/1) ... [2022-11-16 11:28:14,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e440dff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:14, skipping insertion in model container [2022-11-16 11:28:14,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:28:14" (1/1) ... [2022-11-16 11:28:14,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:28:14,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:28:14,450 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/sv-benchmarks/c/array-fpi/s5if.c[587,600] [2022-11-16 11:28:14,491 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:28:14,501 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:28:14,519 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/sv-benchmarks/c/array-fpi/s5if.c[587,600] [2022-11-16 11:28:14,528 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:28:14,546 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:28:14,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:14 WrapperNode [2022-11-16 11:28:14,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:28:14,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:28:14,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:28:14,548 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:28:14,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:14" (1/1) ... [2022-11-16 11:28:14,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:14" (1/1) ... [2022-11-16 11:28:14,614 INFO L138 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-11-16 11:28:14,615 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:28:14,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:28:14,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:28:14,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:28:14,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:14" (1/1) ... [2022-11-16 11:28:14,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:14" (1/1) ... [2022-11-16 11:28:14,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:14" (1/1) ... [2022-11-16 11:28:14,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:14" (1/1) ... [2022-11-16 11:28:14,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:14" (1/1) ... [2022-11-16 11:28:14,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:14" (1/1) ... [2022-11-16 11:28:14,652 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:14" (1/1) ... [2022-11-16 11:28:14,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:14" (1/1) ... [2022-11-16 11:28:14,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:28:14,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:28:14,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:28:14,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:28:14,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:14" (1/1) ... [2022-11-16 11:28:14,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:28:14,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:14,699 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:28:14,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:28:14,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:28:14,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:28:14,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:28:14,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:28:14,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:28:14,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:28:14,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:28:14,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:28:14,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:28:14,874 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:28:14,876 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:28:15,050 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:28:15,057 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:28:15,057 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 11:28:15,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:28:15 BoogieIcfgContainer [2022-11-16 11:28:15,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:28:15,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:28:15,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:28:15,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:28:15,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:28:14" (1/3) ... [2022-11-16 11:28:15,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40236c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:28:15, skipping insertion in model container [2022-11-16 11:28:15,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:14" (2/3) ... [2022-11-16 11:28:15,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40236c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:28:15, skipping insertion in model container [2022-11-16 11:28:15,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:28:15" (3/3) ... [2022-11-16 11:28:15,069 INFO L112 eAbstractionObserver]: Analyzing ICFG s5if.c [2022-11-16 11:28:15,091 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:28:15,092 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:28:15,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:28:15,150 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;@4f539c09, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:28:15,151 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:28:15,155 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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) [2022-11-16 11:28:15,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:28:15,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:15,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:15,164 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:28:15,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:15,171 INFO L85 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2022-11-16 11:28:15,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:15,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513018848] [2022-11-16 11:28:15,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:15,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:15,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:15,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513018848] [2022-11-16 11:28:15,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513018848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:15,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:15,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:28:15,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825007253] [2022-11-16 11:28:15,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:15,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:28:15,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:15,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:28:15,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:28:15,493 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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) 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) [2022-11-16 11:28:15,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:15,514 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2022-11-16 11:28:15,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:28:15,517 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 [2022-11-16 11:28:15,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:15,527 INFO L225 Difference]: With dead ends: 34 [2022-11-16 11:28:15,528 INFO L226 Difference]: Without dead ends: 15 [2022-11-16 11:28:15,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:28:15,537 INFO L413 NwaCegarLoop]: 22 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, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:15,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:28:15,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-16 11:28:15,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-16 11:28:15,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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) [2022-11-16 11:28:15,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-16 11:28:15,593 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2022-11-16 11:28:15,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:15,594 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-16 11:28:15,594 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) [2022-11-16 11:28:15,595 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-11-16 11:28:15,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:28:15,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:15,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:15,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:28:15,596 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:28:15,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:15,597 INFO L85 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2022-11-16 11:28:15,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:15,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743955599] [2022-11-16 11:28:15,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:15,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:15,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:15,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743955599] [2022-11-16 11:28:15,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743955599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:15,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:15,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:28:15,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680602591] [2022-11-16 11:28:15,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:15,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:28:15,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:15,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:28:15,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:28:15,930 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-16 11:28:16,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:16,026 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-11-16 11:28:16,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:28:16,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2022-11-16 11:28:16,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:16,028 INFO L225 Difference]: With dead ends: 28 [2022-11-16 11:28:16,028 INFO L226 Difference]: Without dead ends: 20 [2022-11-16 11:28:16,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:28:16,030 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:16,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 10 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:28:16,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-16 11:28:16,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-11-16 11:28:16,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:16,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-11-16 11:28:16,051 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-11-16 11:28:16,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:16,052 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-11-16 11:28:16,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-16 11:28:16,053 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-11-16 11:28:16,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:28:16,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:16,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:16,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:28:16,054 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:28:16,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:16,055 INFO L85 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2022-11-16 11:28:16,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:16,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312252012] [2022-11-16 11:28:16,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:16,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:16,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:16,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:16,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312252012] [2022-11-16 11:28:16,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312252012] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:28:16,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037953299] [2022-11-16 11:28:16,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:16,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:16,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:16,970 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:16,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:28:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:17,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 11:28:17,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:17,223 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 11 treesize of output 7 [2022-11-16 11:28:17,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-11-16 11:28:17,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:28:17,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2022-11-16 11:28:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:17,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:18,166 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:28:18,167 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-16 11:28:18,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:28:18,183 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 26 treesize of output 18 [2022-11-16 11:28:18,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 10 [2022-11-16 11:28:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:18,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037953299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:18,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:28:18,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 21 [2022-11-16 11:28:18,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241231324] [2022-11-16 11:28:18,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:18,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:28:18,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:18,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:28:18,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=333, Unknown=1, NotChecked=0, Total=420 [2022-11-16 11:28:18,219 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:18,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:18,565 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-11-16 11:28:18,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:28:18,566 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 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 [2022-11-16 11:28:18,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:18,569 INFO L225 Difference]: With dead ends: 47 [2022-11-16 11:28:18,569 INFO L226 Difference]: Without dead ends: 41 [2022-11-16 11:28:18,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=504, Unknown=1, NotChecked=0, Total=650 [2022-11-16 11:28:18,574 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:18,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 44 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 98 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-16 11:28:18,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-16 11:28:18,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2022-11-16 11:28:18,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-11-16 11:28:18,595 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 16 [2022-11-16 11:28:18,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:18,599 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-11-16 11:28:18,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:18,600 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-11-16 11:28:18,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:28:18,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:18,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:18,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 11:28:18,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:18,808 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:28:18,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:18,809 INFO L85 PathProgramCache]: Analyzing trace with hash 680869797, now seen corresponding path program 1 times [2022-11-16 11:28:18,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:18,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560910849] [2022-11-16 11:28:18,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:18,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:18,827 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:28:18,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489241257] [2022-11-16 11:28:18,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:18,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:18,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:18,830 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:18,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:28:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:18,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:28:18,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:18,932 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 11 treesize of output 7 [2022-11-16 11:28:18,977 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 15 treesize of output 7 [2022-11-16 11:28:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:18,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:19,028 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 14 treesize of output 12 [2022-11-16 11:28:19,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 16 [2022-11-16 11:28:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:19,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:19,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560910849] [2022-11-16 11:28:19,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:28:19,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489241257] [2022-11-16 11:28:19,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489241257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:19,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:28:19,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-11-16 11:28:19,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199355333] [2022-11-16 11:28:19,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:19,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:28:19,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:19,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:28:19,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:28:19,049 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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) [2022-11-16 11:28:19,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:19,142 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-11-16 11:28:19,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:28:19,143 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 11:28:19,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:19,144 INFO L225 Difference]: With dead ends: 38 [2022-11-16 11:28:19,144 INFO L226 Difference]: Without dead ends: 26 [2022-11-16 11:28:19,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:28:19,145 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:19,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 37 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:28:19,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-16 11:28:19,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-11-16 11:28:19,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:19,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-16 11:28:19,153 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2022-11-16 11:28:19,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:19,154 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-16 11:28:19,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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) [2022-11-16 11:28:19,154 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-16 11:28:19,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:28:19,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:19,155 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:19,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:19,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:19,362 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:28:19,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:19,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2022-11-16 11:28:19,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:19,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12841803] [2022-11-16 11:28:19,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:19,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:19,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:19,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12841803] [2022-11-16 11:28:19,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12841803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:28:19,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576947057] [2022-11-16 11:28:19,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:28:19,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:19,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:19,520 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:19,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:28:19,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:28:19,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:28:19,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:28:19,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:19,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:19,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:19,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576947057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:19,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:28:19,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-16 11:28:19,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336915403] [2022-11-16 11:28:19,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:19,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:28:19,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:19,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:28:19,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:28:19,777 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:19,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:19,956 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-11-16 11:28:19,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:28:19,957 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:28:19,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:19,960 INFO L225 Difference]: With dead ends: 33 [2022-11-16 11:28:19,960 INFO L226 Difference]: Without dead ends: 29 [2022-11-16 11:28:19,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:28:19,962 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:19,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 28 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:28:19,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-16 11:28:19,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2022-11-16 11:28:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 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) [2022-11-16 11:28:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-11-16 11:28:19,976 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 18 [2022-11-16 11:28:19,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:19,976 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-11-16 11:28:19,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:19,977 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-11-16 11:28:19,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:28:19,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:19,978 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:19,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:20,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:20,185 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:28:20,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:20,186 INFO L85 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2022-11-16 11:28:20,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:20,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299866130] [2022-11-16 11:28:20,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:20,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:20,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:20,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:20,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299866130] [2022-11-16 11:28:20,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299866130] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:28:20,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346279500] [2022-11-16 11:28:20,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:28:20,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:20,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:20,286 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:20,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:28:20,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:28:20,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:28:20,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:28:20,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:20,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:20,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:20,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346279500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:20,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:28:20,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-16 11:28:20,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792896052] [2022-11-16 11:28:20,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:20,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:28:20,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:20,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:28:20,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:28:20,503 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:20,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:20,612 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-11-16 11:28:20,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:28:20,614 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 11:28:20,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:20,614 INFO L225 Difference]: With dead ends: 37 [2022-11-16 11:28:20,614 INFO L226 Difference]: Without dead ends: 25 [2022-11-16 11:28:20,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:28:20,615 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:20,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 31 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:28:20,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-16 11:28:20,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-11-16 11:28:20,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 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) [2022-11-16 11:28:20,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-11-16 11:28:20,622 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2022-11-16 11:28:20,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:20,622 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-11-16 11:28:20,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:20,623 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-11-16 11:28:20,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:28:20,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:20,624 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:20,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:20,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 11:28:20,837 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:28:20,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:20,837 INFO L85 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2022-11-16 11:28:20,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:20,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610086236] [2022-11-16 11:28:20,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:20,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:21,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:21,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610086236] [2022-11-16 11:28:21,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610086236] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:28:21,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512345395] [2022-11-16 11:28:21,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:28:21,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:21,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:21,585 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:21,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:28:21,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:28:21,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:28:21,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 11:28:21,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:21,687 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 11 treesize of output 7 [2022-11-16 11:28:21,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-11-16 11:28:21,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:28:21,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:28:21,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2022-11-16 11:28:22,105 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-16 11:28:22,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-11-16 11:28:24,386 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-16 11:28:24,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 30 [2022-11-16 11:28:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:24,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:28,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:28,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512345395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:28,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:28:28,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-11-16 11:28:28,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563584225] [2022-11-16 11:28:28,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:28,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 11:28:28,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:28,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 11:28:28,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1107, Unknown=10, NotChecked=0, Total=1260 [2022-11-16 11:28:28,309 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 36 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:29,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:29,693 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-11-16 11:28:29,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 11:28:29,694 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 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 21 [2022-11-16 11:28:29,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:29,695 INFO L225 Difference]: With dead ends: 40 [2022-11-16 11:28:29,695 INFO L226 Difference]: Without dead ends: 36 [2022-11-16 11:28:29,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=283, Invalid=2157, Unknown=10, NotChecked=0, Total=2450 [2022-11-16 11:28:29,697 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:29,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 66 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 86 Invalid, 0 Unknown, 157 Unchecked, 0.1s Time] [2022-11-16 11:28:29,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-16 11:28:29,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2022-11-16 11:28:29,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:29,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-16 11:28:29,703 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21 [2022-11-16 11:28:29,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:29,704 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-16 11:28:29,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:29,704 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-16 11:28:29,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:28:29,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:29,705 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:29,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-16 11:28:29,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:29,906 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:28:29,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:29,906 INFO L85 PathProgramCache]: Analyzing trace with hash 692240447, now seen corresponding path program 1 times [2022-11-16 11:28:29,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:29,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188304669] [2022-11-16 11:28:29,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:29,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:29,918 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:28:29,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1954281567] [2022-11-16 11:28:29,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:29,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:29,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:29,921 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:29,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:28:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:30,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:28:30,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:30,079 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 13 treesize of output 9 [2022-11-16 11:28:30,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:30,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:28:30,204 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 15 treesize of output 7 [2022-11-16 11:28:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:30,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:30,263 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_190 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_190) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 5)) is different from false [2022-11-16 11:28:30,274 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_190 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_190) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) is different from false [2022-11-16 11:28:30,290 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:28:30,290 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-11-16 11:28:30,299 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:28:30,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2022-11-16 11:28:30,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2022-11-16 11:28:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-16 11:28:30,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:30,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188304669] [2022-11-16 11:28:30,356 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:28:30,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954281567] [2022-11-16 11:28:30,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954281567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:30,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:28:30,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-11-16 11:28:30,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468038206] [2022-11-16 11:28:30,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:30,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:28:30,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:30,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:28:30,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=126, Unknown=2, NotChecked=46, Total=210 [2022-11-16 11:28:30,359 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:30,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:30,625 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-11-16 11:28:30,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:28:30,628 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 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 21 [2022-11-16 11:28:30,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:30,628 INFO L225 Difference]: With dead ends: 33 [2022-11-16 11:28:30,629 INFO L226 Difference]: Without dead ends: 26 [2022-11-16 11:28:30,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=238, Unknown=2, NotChecked=66, Total=380 [2022-11-16 11:28:30,630 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:30,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 57 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 121 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-16 11:28:30,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-16 11:28:30,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-11-16 11:28:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:30,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-11-16 11:28:30,637 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2022-11-16 11:28:30,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:30,637 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-11-16 11:28:30,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:30,637 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-11-16 11:28:30,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 11:28:30,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:30,638 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:30,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-16 11:28:30,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:30,843 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:28:30,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:30,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1038837147, now seen corresponding path program 5 times [2022-11-16 11:28:30,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:30,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606819136] [2022-11-16 11:28:30,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:30,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:30,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:30,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606819136] [2022-11-16 11:28:30,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606819136] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:28:30,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174006162] [2022-11-16 11:28:30,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:28:30,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:30,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:30,991 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:31,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:28:31,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 11:28:31,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:28:31,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:28:31,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:31,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:31,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174006162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:31,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:28:31,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-16 11:28:31,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218900916] [2022-11-16 11:28:31,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:31,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:28:31,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:31,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:28:31,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:28:31,276 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2022-11-16 11:28:31,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:31,453 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-11-16 11:28:31,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:28:31,454 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 24 [2022-11-16 11:28:31,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:31,455 INFO L225 Difference]: With dead ends: 45 [2022-11-16 11:28:31,455 INFO L226 Difference]: Without dead ends: 30 [2022-11-16 11:28:31,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:28:31,456 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:31,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 34 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:28:31,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-16 11:28:31,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2022-11-16 11:28:31,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:31,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-11-16 11:28:31,465 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2022-11-16 11:28:31,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:31,465 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-11-16 11:28:31,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2022-11-16 11:28:31,465 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-11-16 11:28:31,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 11:28:31,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:31,467 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:31,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:31,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:31,673 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:28:31,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:31,673 INFO L85 PathProgramCache]: Analyzing trace with hash -2121994781, now seen corresponding path program 6 times [2022-11-16 11:28:31,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:31,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968659787] [2022-11-16 11:28:31,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:31,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:31,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:32,736 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:32,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:32,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968659787] [2022-11-16 11:28:32,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968659787] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:28:32,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035317049] [2022-11-16 11:28:32,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:28:32,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:32,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:32,741 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:32,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:28:32,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-16 11:28:32,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:28:32,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-16 11:28:32,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:32,852 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 11 treesize of output 7 [2022-11-16 11:28:32,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:32,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:28:32,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:32,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:28:32,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:32,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:28:33,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:33,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2022-11-16 11:28:33,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:33,191 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 11:28:33,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 37 [2022-11-16 11:28:33,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:33,405 INFO L321 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-16 11:28:33,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 51 [2022-11-16 11:28:33,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:33,727 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:28:33,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 38 [2022-11-16 11:28:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:28:33,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:06,860 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_267 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_267))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse2 (select v_ArrVal_267 |ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 4)))) (let ((.cse3 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2 .cse0))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 8)))) (or (not (= 5 .cse0)) (< 14 (+ .cse1 .cse2 .cse3 .cse0)) (not (= .cse3 5)) (not (= .cse2 5))))))))) (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_267 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_267))) (let ((.cse11 (select .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse8 (select .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse9 (select v_ArrVal_267 |ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse6 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 4)))) (let ((.cse7 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse9 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 8)))) (or (not (= 5 .cse6)) (not (= .cse7 5)) (< (+ .cse8 .cse9 .cse7 .cse6) 16) (not (= .cse9 5)))))))))) is different from false [2022-11-16 11:29:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 5 not checked. [2022-11-16 11:29:07,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035317049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:07,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:29:07,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 16] total 43 [2022-11-16 11:29:07,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284679849] [2022-11-16 11:29:07,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:07,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 11:29:07,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:29:07,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 11:29:07,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1556, Unknown=11, NotChecked=80, Total=1806 [2022-11-16 11:29:07,495 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 43 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:10,845 WARN L833 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 0) (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_267 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_267))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse2 (select v_ArrVal_267 |ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 4)))) (let ((.cse3 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2 .cse0))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 8)))) (or (not (= 5 .cse0)) (< 14 (+ .cse1 .cse2 .cse3 .cse0)) (not (= .cse3 5)) (not (= .cse2 5))))))))) (<= (+ 2 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.base|) (not (= |c_ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= |c_ULTIMATE.start_main_~i~0#1| 0) (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_267 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_267))) (let ((.cse11 (select .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse8 (select .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse9 (select v_ArrVal_267 |ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse6 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 4)))) (let ((.cse7 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse9 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 8)))) (or (not (= 5 .cse6)) (not (= .cse7 5)) (< (+ .cse8 .cse9 .cse7 .cse6) 16) (not (= .cse9 5)))))))))) is different from false [2022-11-16 11:29:13,381 WARN L833 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 0) (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_267 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_267))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse2 (select v_ArrVal_267 |ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 4)))) (let ((.cse3 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2 .cse0))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 8)))) (or (not (= 5 .cse0)) (< 14 (+ .cse1 .cse2 .cse3 .cse0)) (not (= .cse3 5)) (not (= .cse2 5))))))))) (<= (+ 2 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.base|) (not (= |c_ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_267 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_267))) (let ((.cse11 (select .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse8 (select .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse9 (select v_ArrVal_267 |ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse6 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 4)))) (let ((.cse7 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse9 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 8)))) (or (not (= 5 .cse6)) (not (= .cse7 5)) (< (+ .cse8 .cse9 .cse7 .cse6) 16) (not (= .cse9 5))))))))) (<= 1 |c_ULTIMATE.start_main_~i~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 1)) is different from false [2022-11-16 11:29:16,112 WARN L833 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 0) (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_267 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_267))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse2 (select v_ArrVal_267 |ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 4)))) (let ((.cse3 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2 .cse0))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 8)))) (or (not (= 5 .cse0)) (< 14 (+ .cse1 .cse2 .cse3 .cse0)) (not (= .cse3 5)) (not (= .cse2 5))))))))) (<= (+ 2 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.base|) (not (= |c_ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (<= 2 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_267 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_267))) (let ((.cse11 (select .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse8 (select .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse9 (select v_ArrVal_267 |ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse6 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 4)))) (let ((.cse7 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse9 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 8)))) (or (not (= 5 .cse6)) (not (= .cse7 5)) (< (+ .cse8 .cse9 .cse7 .cse6) 16) (not (= .cse9 5))))))))) (<= |c_ULTIMATE.start_main_~i~0#1| 2)) is different from false [2022-11-16 11:29:18,816 WARN L833 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 0) (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_267 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_267))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse2 (select v_ArrVal_267 |ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 4)))) (let ((.cse3 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2 .cse0))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 8)))) (or (not (= 5 .cse0)) (< 14 (+ .cse1 .cse2 .cse3 .cse0)) (not (= .cse3 5)) (not (= .cse2 5))))))))) (<= (+ 2 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.base|) (not (= |c_ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (<= 3 c_~N~0) (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_267 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_267))) (let ((.cse11 (select .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse8 (select .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse9 (select v_ArrVal_267 |ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse6 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 4)))) (let ((.cse7 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse9 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 8)))) (or (not (= 5 .cse6)) (not (= .cse7 5)) (< (+ .cse8 .cse9 .cse7 .cse6) 16) (not (= .cse9 5))))))))) (<= |c_ULTIMATE.start_main_~i~0#1| 2)) is different from false [2022-11-16 11:29:21,418 WARN L833 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 0) (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_267 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_267))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse2 (select v_ArrVal_267 |ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 4)))) (let ((.cse3 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2 .cse0))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 8)))) (or (not (= 5 .cse0)) (< 14 (+ .cse1 .cse2 .cse3 .cse0)) (not (= .cse3 5)) (not (= .cse2 5))))))))) (<= (+ 2 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.base|) (not (= |c_ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (<= 3 c_~N~0) (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_267 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_267))) (let ((.cse11 (select .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse8 (select .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse9 (select v_ArrVal_267 |ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse6 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 4)))) (let ((.cse7 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse9 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 8)))) (or (not (= 5 .cse6)) (not (= .cse7 5)) (< (+ .cse8 .cse9 .cse7 .cse6) 16) (not (= .cse9 5))))))))) (<= |c_ULTIMATE.start_main_~i~0#1| 3)) is different from false [2022-11-16 11:29:24,401 WARN L833 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 0) (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_267 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_267))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse2 (select v_ArrVal_267 |ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 4)))) (let ((.cse3 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2 .cse0))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 8)))) (or (not (= 5 .cse0)) (< 14 (+ .cse1 .cse2 .cse3 .cse0)) (not (= .cse3 5)) (not (= .cse2 5))))))))) (<= (+ 2 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.base|) (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_267 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_267))) (let ((.cse11 (select .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse8 (select .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse9 (select v_ArrVal_267 |ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse6 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 4)))) (let ((.cse7 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse9 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 8)))) (or (not (= 5 .cse6)) (not (= .cse7 5)) (< (+ .cse8 .cse9 .cse7 .cse6) 16) (not (= .cse9 5)))))))))) is different from false [2022-11-16 11:29:34,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:34,993 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-11-16 11:29:34,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 11:29:34,994 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 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 26 [2022-11-16 11:29:34,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:34,994 INFO L225 Difference]: With dead ends: 54 [2022-11-16 11:29:34,994 INFO L226 Difference]: Without dead ends: 48 [2022-11-16 11:29:34,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 59.6s TimeCoverageRelationStatistics Valid=440, Invalid=3730, Unknown=18, NotChecked=924, Total=5112 [2022-11-16 11:29:34,998 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:34,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 92 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 238 Invalid, 0 Unknown, 113 Unchecked, 1.3s Time] [2022-11-16 11:29:34,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-16 11:29:35,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 28. [2022-11-16 11:29:35,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:35,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-11-16 11:29:35,010 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 26 [2022-11-16 11:29:35,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:35,011 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-11-16 11:29:35,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:35,011 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-11-16 11:29:35,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 11:29:35,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:35,012 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:35,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:29:35,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:29:35,225 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:29:35,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:35,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2064736479, now seen corresponding path program 2 times [2022-11-16 11:29:35,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:29:35,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130618175] [2022-11-16 11:29:35,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:35,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:29:35,240 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:29:35,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539278638] [2022-11-16 11:29:35,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:29:35,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:29:35,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:29:35,242 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:29:35,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:29:35,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:29:35,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:29:35,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:29:35,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:35,721 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 13 treesize of output 9 [2022-11-16 11:29:36,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:36,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:29:36,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:36,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:29:36,584 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 15 treesize of output 7 [2022-11-16 11:29:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:36,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:36,932 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_315 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_315) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 5)) is different from false [2022-11-16 11:29:36,978 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_315 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_315) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 8 |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2022-11-16 11:29:37,040 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_315 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_315) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) 5)) is different from false [2022-11-16 11:29:37,103 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:29:37,103 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-11-16 11:29:37,154 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:29:37,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2022-11-16 11:29:37,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2022-11-16 11:29:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2022-11-16 11:29:37,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:29:37,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130618175] [2022-11-16 11:29:37,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:29:37,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539278638] [2022-11-16 11:29:37,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539278638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:37,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:29:37,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-11-16 11:29:37,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907705388] [2022-11-16 11:29:37,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:37,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:29:37,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:29:37,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:29:37,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=201, Unknown=3, NotChecked=90, Total=342 [2022-11-16 11:29:37,699 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2022-11-16 11:29:39,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:39,614 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-11-16 11:29:39,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:29:39,615 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) Word has length 26 [2022-11-16 11:29:39,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:39,616 INFO L225 Difference]: With dead ends: 40 [2022-11-16 11:29:39,616 INFO L226 Difference]: Without dead ends: 33 [2022-11-16 11:29:39,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=91, Invalid=380, Unknown=3, NotChecked=126, Total=600 [2022-11-16 11:29:39,617 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:39,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 68 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 200 Invalid, 1 Unknown, 71 Unchecked, 1.0s Time] [2022-11-16 11:29:39,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-16 11:29:39,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-11-16 11:29:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:39,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-11-16 11:29:39,632 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 26 [2022-11-16 11:29:39,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:39,632 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-11-16 11:29:39,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2022-11-16 11:29:39,633 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-11-16 11:29:39,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 11:29:39,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:39,634 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:39,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:29:39,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:29:39,839 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:29:39,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:39,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1421579903, now seen corresponding path program 3 times [2022-11-16 11:29:39,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:29:39,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116434989] [2022-11-16 11:29:39,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:39,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:29:39,857 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:29:39,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467208740] [2022-11-16 11:29:39,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:29:39,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:29:39,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:29:39,859 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:29:39,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:29:39,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 11:29:39,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:29:39,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:29:39,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:40,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:41,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:29:41,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116434989] [2022-11-16 11:29:41,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:29:41,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467208740] [2022-11-16 11:29:41,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467208740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:41,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:29:41,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-16 11:29:41,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323854100] [2022-11-16 11:29:41,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:41,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:29:41,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:29:41,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:29:41,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:29:41,306 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:42,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:42,308 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2022-11-16 11:29:42,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:29:42,309 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-16 11:29:42,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:42,309 INFO L225 Difference]: With dead ends: 60 [2022-11-16 11:29:42,310 INFO L226 Difference]: Without dead ends: 39 [2022-11-16 11:29:42,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:29:42,311 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:42,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 23 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:29:42,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-16 11:29:42,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-11-16 11:29:42,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:42,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-11-16 11:29:42,325 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2022-11-16 11:29:42,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:42,326 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-11-16 11:29:42,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:42,326 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-11-16 11:29:42,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-16 11:29:42,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:42,327 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:42,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:29:42,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:29:42,531 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:29:42,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:42,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1961716541, now seen corresponding path program 4 times [2022-11-16 11:29:42,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:29:42,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047005289] [2022-11-16 11:29:42,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:42,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:29:42,547 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:29:42,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86529608] [2022-11-16 11:29:42,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:29:42,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:29:42,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:29:42,563 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:29:42,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:29:42,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:29:42,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:29:42,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 11:29:42,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:42,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-11-16 11:29:42,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:29:43,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:29:43,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:29:43,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:29:44,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:29:44,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-16 11:29:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:29:44,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:46,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:29:46,719 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-11-16 11:29:46,760 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:29:46,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2022-11-16 11:29:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:47,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:29:47,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047005289] [2022-11-16 11:29:47,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:29:47,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86529608] [2022-11-16 11:29:47,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86529608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:47,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:29:47,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2022-11-16 11:29:47,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104422169] [2022-11-16 11:29:47,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:47,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 11:29:47,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:29:47,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 11:29:47,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:29:47,377 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:49,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:49,753 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-11-16 11:29:49,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 11:29:49,754 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 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 [2022-11-16 11:29:49,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:49,755 INFO L225 Difference]: With dead ends: 53 [2022-11-16 11:29:49,755 INFO L226 Difference]: Without dead ends: 49 [2022-11-16 11:29:49,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=309, Invalid=1173, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 11:29:49,756 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:49,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 85 Unchecked, 0.4s Time] [2022-11-16 11:29:49,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-16 11:29:49,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2022-11-16 11:29:49,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:49,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-11-16 11:29:49,776 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 31 [2022-11-16 11:29:49,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:49,776 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-11-16 11:29:49,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:49,777 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-11-16 11:29:49,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 11:29:49,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:49,778 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:49,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-16 11:29:49,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:29:49,982 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:29:49,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:49,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1661543779, now seen corresponding path program 5 times [2022-11-16 11:29:49,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:29:49,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512932114] [2022-11-16 11:29:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:49,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:29:50,008 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:29:50,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923893541] [2022-11-16 11:29:50,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:29:50,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:29:50,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:29:50,012 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:29:50,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:29:50,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-16 11:29:50,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:29:50,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:29:50,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:51,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:51,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:29:51,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512932114] [2022-11-16 11:29:51,901 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:29:51,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923893541] [2022-11-16 11:29:51,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923893541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:51,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:29:51,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-16 11:29:51,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837612654] [2022-11-16 11:29:51,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:51,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:29:51,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:29:51,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:29:51,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:29:51,904 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:53,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:53,088 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2022-11-16 11:29:53,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:29:53,089 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-16 11:29:53,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:53,089 INFO L225 Difference]: With dead ends: 84 [2022-11-16 11:29:53,090 INFO L226 Difference]: Without dead ends: 52 [2022-11-16 11:29:53,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:29:53,091 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 60 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:53,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 33 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:29:53,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-16 11:29:53,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2022-11-16 11:29:53,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:53,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-11-16 11:29:53,113 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 34 [2022-11-16 11:29:53,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:53,113 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-11-16 11:29:53,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:53,114 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-11-16 11:29:53,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 11:29:53,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:53,115 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:53,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:29:53,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:29:53,318 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:29:53,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:53,319 INFO L85 PathProgramCache]: Analyzing trace with hash 83735393, now seen corresponding path program 6 times [2022-11-16 11:29:53,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:29:53,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297864174] [2022-11-16 11:29:53,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:53,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:29:53,341 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:29:53,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017726204] [2022-11-16 11:29:53,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:29:53,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:29:53,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:29:53,343 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:29:53,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:29:53,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-16 11:29:53,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:29:53,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 11:29:53,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:54,017 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 13 treesize of output 9 [2022-11-16 11:29:54,261 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-16 11:29:54,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-11-16 11:29:55,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:55,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 11:29:55,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:55,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 11:29:55,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:55,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 11:29:56,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:29:56,089 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:29:56,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2022-11-16 11:29:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:56,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:59,589 INFO L321 Elim1Store]: treesize reduction 20, result has 63.0 percent of original size [2022-11-16 11:29:59,590 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 46 [2022-11-16 11:29:59,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:29:59,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-11-16 11:29:59,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2022-11-16 11:30:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:00,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:00,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297864174] [2022-11-16 11:30:00,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:30:00,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017726204] [2022-11-16 11:30:00,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017726204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:00,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:30:00,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-11-16 11:30:00,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815719952] [2022-11-16 11:30:00,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:00,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 11:30:00,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:00,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 11:30:00,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=946, Unknown=2, NotChecked=0, Total=1122 [2022-11-16 11:30:00,691 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:04,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:30:04,500 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2022-11-16 11:30:04,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:30:04,501 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-16 11:30:04,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:30:04,501 INFO L225 Difference]: With dead ends: 55 [2022-11-16 11:30:04,502 INFO L226 Difference]: Without dead ends: 46 [2022-11-16 11:30:04,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=351, Invalid=1717, Unknown=2, NotChecked=0, Total=2070 [2022-11-16 11:30:04,504 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 71 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:30:04,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 55 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 328 Invalid, 0 Unknown, 107 Unchecked, 1.6s Time] [2022-11-16 11:30:04,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-16 11:30:04,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-16 11:30:04,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:04,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-11-16 11:30:04,529 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 36 [2022-11-16 11:30:04,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:30:04,530 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-11-16 11:30:04,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:04,530 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-11-16 11:30:04,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 11:30:04,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:30:04,531 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:04,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:30:04,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 11:30:04,738 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:30:04,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:04,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1146006857, now seen corresponding path program 7 times [2022-11-16 11:30:04,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:04,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880647679] [2022-11-16 11:30:04,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:04,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:04,753 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:30:04,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704794849] [2022-11-16 11:30:04,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:30:04,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:04,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:30:04,755 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:30:04,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:30:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:04,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:30:04,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:06,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:07,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:07,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880647679] [2022-11-16 11:30:07,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:30:07,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704794849] [2022-11-16 11:30:07,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704794849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:07,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:30:07,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-11-16 11:30:07,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517358488] [2022-11-16 11:30:07,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:07,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:30:07,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:07,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:30:07,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:30:07,168 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 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) [2022-11-16 11:30:08,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:30:08,669 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2022-11-16 11:30:08,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:30:08,670 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 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 39 [2022-11-16 11:30:08,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:30:08,671 INFO L225 Difference]: With dead ends: 86 [2022-11-16 11:30:08,671 INFO L226 Difference]: Without dead ends: 54 [2022-11-16 11:30:08,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:30:08,672 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 87 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:30:08,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 31 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:30:08,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-16 11:30:08,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2022-11-16 11:30:08,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:08,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-11-16 11:30:08,688 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 39 [2022-11-16 11:30:08,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:30:08,689 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-11-16 11:30:08,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 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) [2022-11-16 11:30:08,689 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-11-16 11:30:08,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 11:30:08,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:30:08,690 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:08,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:30:08,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:30:08,894 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:30:08,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:08,894 INFO L85 PathProgramCache]: Analyzing trace with hash 127479307, now seen corresponding path program 8 times [2022-11-16 11:30:08,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:08,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484764681] [2022-11-16 11:30:08,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:08,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:08,908 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:30:08,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058934160] [2022-11-16 11:30:08,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:30:08,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:08,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:30:08,910 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:30:08,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:30:09,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:30:09,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:30:09,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 11:30:09,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:09,715 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 15 treesize of output 11 [2022-11-16 11:30:10,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:30:10,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:30:10,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:30:10,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:30:10,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:30:10,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:30:11,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:30:11,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:30:11,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:30:11,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:30:11,672 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 15 treesize of output 7 [2022-11-16 11:30:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:30:11,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:12,144 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_648 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_648) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) is different from false [2022-11-16 11:30:12,182 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_648 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_648) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) 5)) is different from false [2022-11-16 11:30:12,233 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_648 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_648) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 12 |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2022-11-16 11:30:12,282 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_648 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_648) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) 5)) is different from false [2022-11-16 11:30:12,333 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_648 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_648) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) 5)) is different from false [2022-11-16 11:30:13,267 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-16 11:30:13,268 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2022-11-16 11:30:13,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:30:13,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2022-11-16 11:30:13,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2022-11-16 11:30:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 37 not checked. [2022-11-16 11:30:14,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:14,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484764681] [2022-11-16 11:30:14,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:30:14,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058934160] [2022-11-16 11:30:14,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058934160] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:14,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:30:14,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2022-11-16 11:30:14,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902142041] [2022-11-16 11:30:14,321 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:14,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 11:30:14,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:14,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 11:30:14,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=568, Unknown=9, NotChecked=260, Total=930 [2022-11-16 11:30:14,323 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:18,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:30:18,494 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2022-11-16 11:30:18,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:30:18,495 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 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 41 [2022-11-16 11:30:18,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:30:18,496 INFO L225 Difference]: With dead ends: 57 [2022-11-16 11:30:18,496 INFO L226 Difference]: Without dead ends: 48 [2022-11-16 11:30:18,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 51 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=130, Invalid=873, Unknown=9, NotChecked=320, Total=1332 [2022-11-16 11:30:18,497 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:30:18,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 98 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 566 Invalid, 0 Unknown, 232 Unchecked, 2.8s Time] [2022-11-16 11:30:18,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-16 11:30:18,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-16 11:30:18,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-11-16 11:30:18,515 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 41 [2022-11-16 11:30:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:30:18,515 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-11-16 11:30:18,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:18,516 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-11-16 11:30:18,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 11:30:18,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:30:18,517 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:18,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 11:30:18,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:30:18,723 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:30:18,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:18,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1971909221, now seen corresponding path program 9 times [2022-11-16 11:30:18,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:18,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894819480] [2022-11-16 11:30:18,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:18,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:18,746 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:30:18,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454543833] [2022-11-16 11:30:18,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:30:18,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:18,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:30:18,748 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:30:18,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:30:18,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-16 11:30:18,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:30:18,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:30:18,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:20,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:21,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:21,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894819480] [2022-11-16 11:30:21,875 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:30:21,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454543833] [2022-11-16 11:30:21,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454543833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:21,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:30:21,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-11-16 11:30:21,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928609807] [2022-11-16 11:30:21,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:21,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 11:30:21,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:21,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 11:30:21,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:30:21,877 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:23,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:30:23,699 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2022-11-16 11:30:23,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:30:23,700 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 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 44 [2022-11-16 11:30:23,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:30:23,701 INFO L225 Difference]: With dead ends: 89 [2022-11-16 11:30:23,701 INFO L226 Difference]: Without dead ends: 57 [2022-11-16 11:30:23,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:30:23,702 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 101 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:30:23,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 23 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:30:23,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-16 11:30:23,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2022-11-16 11:30:23,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:23,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-11-16 11:30:23,717 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 44 [2022-11-16 11:30:23,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:30:23,718 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-11-16 11:30:23,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:23,718 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-11-16 11:30:23,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 11:30:23,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:30:23,718 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:23,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:30:23,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:30:23,919 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:30:23,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:23,920 INFO L85 PathProgramCache]: Analyzing trace with hash -53955047, now seen corresponding path program 10 times [2022-11-16 11:30:23,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:23,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723974549] [2022-11-16 11:30:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:23,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:23,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:30:23,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981236129] [2022-11-16 11:30:23,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:30:23,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:23,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:30:23,937 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:30:23,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 11:30:24,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:30:24,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:30:24,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 11:30:24,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:24,459 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 15 treesize of output 11 [2022-11-16 11:30:25,202 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-16 11:30:25,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 34 [2022-11-16 11:30:26,040 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-16 11:30:26,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 68 [2022-11-16 11:30:26,756 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-16 11:30:26,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 68 [2022-11-16 11:30:27,465 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-16 11:30:27,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 68 [2022-11-16 11:30:28,229 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-16 11:30:28,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 68 [2022-11-16 11:30:28,992 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-16 11:30:28,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 60 [2022-11-16 11:30:29,563 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:30:29,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-11-16 11:30:30,019 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 39 proven. 44 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 11:30:30,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:33,410 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 85 treesize of output 77 [2022-11-16 11:30:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 30 proven. 53 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 11:30:33,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:33,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723974549] [2022-11-16 11:30:33,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:30:33,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981236129] [2022-11-16 11:30:33,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981236129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:33,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:30:33,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-11-16 11:30:33,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389809963] [2022-11-16 11:30:33,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:33,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 11:30:33,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:33,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 11:30:33,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:30:33,956 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:36,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:30:36,125 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-11-16 11:30:36,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 11:30:36,127 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-16 11:30:36,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:30:36,127 INFO L225 Difference]: With dead ends: 57 [2022-11-16 11:30:36,127 INFO L226 Difference]: Without dead ends: 53 [2022-11-16 11:30:36,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=425, Invalid=1297, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 11:30:36,128 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:30:36,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 37 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-11-16 11:30:36,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-16 11:30:36,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2022-11-16 11:30:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:36,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-11-16 11:30:36,165 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 46 [2022-11-16 11:30:36,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:30:36,166 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-11-16 11:30:36,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:36,166 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-11-16 11:30:36,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 11:30:36,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:30:36,168 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:36,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:30:36,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:36,375 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:30:36,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:36,376 INFO L85 PathProgramCache]: Analyzing trace with hash 568845021, now seen corresponding path program 11 times [2022-11-16 11:30:36,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:36,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874834040] [2022-11-16 11:30:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:36,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:36,392 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:30:36,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448518783] [2022-11-16 11:30:36,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:30:36,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:36,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:30:36,394 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:30:36,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 11:30:36,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-16 11:30:36,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:30:36,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-16 11:30:36,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:36,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-11-16 11:30:37,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:30:37,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:30:37,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:30:38,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:30:38,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:30:38,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:30:39,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:30:39,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:30:39,758 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 15 treesize of output 7 [2022-11-16 11:30:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:30:39,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:41,428 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_878 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_878) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 20 |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2022-11-16 11:30:41,482 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_878 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_878) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 20 |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2022-11-16 11:30:42,681 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-16 11:30:42,682 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2022-11-16 11:30:42,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:30:42,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2022-11-16 11:30:42,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2022-11-16 11:30:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 27 not checked. [2022-11-16 11:30:44,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:44,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874834040] [2022-11-16 11:30:44,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:30:44,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448518783] [2022-11-16 11:30:44,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448518783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:44,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:30:44,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2022-11-16 11:30:44,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771247299] [2022-11-16 11:30:44,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:44,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 11:30:44,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:44,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 11:30:44,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=938, Unknown=15, NotChecked=126, Total=1190 [2022-11-16 11:30:44,192 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:48,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:30:48,356 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2022-11-16 11:30:48,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 11:30:48,356 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 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 46 [2022-11-16 11:30:48,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:30:48,357 INFO L225 Difference]: With dead ends: 61 [2022-11-16 11:30:48,357 INFO L226 Difference]: Without dead ends: 52 [2022-11-16 11:30:48,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=160, Invalid=1473, Unknown=15, NotChecked=158, Total=1806 [2022-11-16 11:30:48,358 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:30:48,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 105 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 530 Invalid, 0 Unknown, 265 Unchecked, 2.5s Time] [2022-11-16 11:30:48,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-16 11:30:48,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2022-11-16 11:30:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:48,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-11-16 11:30:48,386 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 46 [2022-11-16 11:30:48,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:30:48,387 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-11-16 11:30:48,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:48,387 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-11-16 11:30:48,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-16 11:30:48,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:30:48,388 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:48,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 11:30:48,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:48,596 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:30:48,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:48,596 INFO L85 PathProgramCache]: Analyzing trace with hash 481983565, now seen corresponding path program 12 times [2022-11-16 11:30:48,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:48,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137430887] [2022-11-16 11:30:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:48,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:48,612 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:30:48,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724141886] [2022-11-16 11:30:48,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:30:48,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:48,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:30:48,614 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:30:48,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 11:30:48,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-16 11:30:48,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:30:48,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:30:48,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:50,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:52,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:52,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137430887] [2022-11-16 11:30:52,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:30:52,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724141886] [2022-11-16 11:30:52,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724141886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:52,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:30:52,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2022-11-16 11:30:52,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355133243] [2022-11-16 11:30:52,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:52,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 11:30:52,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:52,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 11:30:52,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-11-16 11:30:52,353 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:54,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:30:54,204 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2022-11-16 11:30:54,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:30:54,205 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 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 49 [2022-11-16 11:30:54,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:30:54,205 INFO L225 Difference]: With dead ends: 102 [2022-11-16 11:30:54,205 INFO L226 Difference]: Without dead ends: 65 [2022-11-16 11:30:54,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 62 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=324, Invalid=936, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 11:30:54,207 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 103 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:30:54,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 35 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:30:54,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-16 11:30:54,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2022-11-16 11:30:54,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:54,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-11-16 11:30:54,226 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 49 [2022-11-16 11:30:54,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:30:54,227 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-11-16 11:30:54,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:54,227 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-11-16 11:30:54,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-16 11:30:54,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:30:54,228 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:54,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 11:30:54,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 11:30:54,434 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:30:54,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:54,435 INFO L85 PathProgramCache]: Analyzing trace with hash -97226097, now seen corresponding path program 13 times [2022-11-16 11:30:54,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:54,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825546226] [2022-11-16 11:30:54,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:54,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:54,451 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:30:54,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [298970552] [2022-11-16 11:30:54,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:30:54,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:54,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:30:54,453 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:30:54,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 11:30:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:54,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-16 11:30:54,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:54,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-11-16 11:30:55,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:30:55,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:30:56,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:30:56,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:30:56,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:30:57,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:30:57,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:30:57,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:30:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 33 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:30:58,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:59,803 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (or (forall ((v_ArrVal_1043 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1043) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) 5))) (forall ((v_ArrVal_1042 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1042) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| 4)))))) is different from false [2022-11-16 11:31:00,423 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (or (forall ((v_ArrVal_1043 (Array Int Int))) (not (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1043) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 16 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (forall ((v_ArrVal_1042 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1042) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 12 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) is different from false [2022-11-16 11:31:00,508 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (or (forall ((v_ArrVal_1042 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1042) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 16 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (forall ((v_ArrVal_1043 (Array Int Int))) (not (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1043) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 20 |c_ULTIMATE.start_main_~a~0#1.offset|))))))) is different from false [2022-11-16 11:31:00,999 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (or (forall ((v_ArrVal_1042 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1042) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| 24)) 5)) (forall ((v_ArrVal_1043 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1043) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 28 |c_ULTIMATE.start_main_~a~0#1.offset|)) 5))))) is different from false [2022-11-16 11:31:01,081 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1043 (Array Int Int))) (not (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1043) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 28 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (forall ((v_ArrVal_1042 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1042) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24))))) is different from false [2022-11-16 11:31:01,168 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1035 Int) (v_ArrVal_1043 (Array Int Int)) (v_ArrVal_1042 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1035)))) (or (= 5 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1042) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24))) (not (= 5 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1043) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 28 |c_ULTIMATE.start_main_~a~0#1.offset|))))))) is different from false [2022-11-16 11:31:01,587 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:31:01,587 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 51 [2022-11-16 11:31:01,665 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:31:01,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 66 [2022-11-16 11:31:01,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2022-11-16 11:31:01,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 18 [2022-11-16 11:31:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 15 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 81 not checked. [2022-11-16 11:31:03,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:03,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825546226] [2022-11-16 11:31:03,652 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:31:03,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298970552] [2022-11-16 11:31:03,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298970552] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:31:03,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:31:03,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24] total 41 [2022-11-16 11:31:03,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173044908] [2022-11-16 11:31:03,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:31:03,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-16 11:31:03,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:03,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-16 11:31:03,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1066, Unknown=22, NotChecked=426, Total=1640 [2022-11-16 11:31:03,656 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:12,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:12,981 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2022-11-16 11:31:12,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 11:31:12,982 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 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 51 [2022-11-16 11:31:12,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:12,983 INFO L225 Difference]: With dead ends: 128 [2022-11-16 11:31:12,983 INFO L226 Difference]: Without dead ends: 119 [2022-11-16 11:31:12,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 60 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=140, Invalid=1194, Unknown=22, NotChecked=450, Total=1806 [2022-11-16 11:31:12,985 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 51 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 790 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:12,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 186 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 794 Invalid, 0 Unknown, 790 Unchecked, 3.9s Time] [2022-11-16 11:31:12,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-16 11:31:13,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 84. [2022-11-16 11:31:13,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:13,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2022-11-16 11:31:13,020 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 51 [2022-11-16 11:31:13,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:13,020 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2022-11-16 11:31:13,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:13,021 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2022-11-16 11:31:13,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-16 11:31:13,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:13,022 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:13,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 11:31:13,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:31:13,228 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:31:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:13,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1685295503, now seen corresponding path program 14 times [2022-11-16 11:31:13,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:13,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97632909] [2022-11-16 11:31:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:13,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:13,245 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:31:13,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35424805] [2022-11-16 11:31:13,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:31:13,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:31:13,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:31:13,247 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:31:13,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 11:31:13,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:31:13,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:31:13,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:31:13,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 64 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:15,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:31:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 64 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:17,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:17,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97632909] [2022-11-16 11:31:17,296 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:31:17,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35424805] [2022-11-16 11:31:17,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35424805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:31:17,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:31:17,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2022-11-16 11:31:17,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650001442] [2022-11-16 11:31:17,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:31:17,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 11:31:17,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:17,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 11:31:17,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:31:17,300 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:22,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:22,138 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2022-11-16 11:31:22,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 11:31:22,138 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 30 states have internal predecessors, (79), 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 53 [2022-11-16 11:31:22,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:22,139 INFO L225 Difference]: With dead ends: 132 [2022-11-16 11:31:22,140 INFO L226 Difference]: Without dead ends: 128 [2022-11-16 11:31:22,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 66 SyntacticMatches, 10 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=549, Invalid=1803, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 11:31:22,142 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 82 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:22,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 38 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-16 11:31:22,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-16 11:31:22,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 107. [2022-11-16 11:31:22,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0849056603773586) internal successors, (115), 106 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:22,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2022-11-16 11:31:22,197 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 53 [2022-11-16 11:31:22,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:22,198 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2022-11-16 11:31:22,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:22,198 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2022-11-16 11:31:22,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 11:31:22,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:22,199 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:22,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-16 11:31:22,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:31:22,406 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:31:22,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:22,407 INFO L85 PathProgramCache]: Analyzing trace with hash 306214747, now seen corresponding path program 15 times [2022-11-16 11:31:22,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:22,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812512992] [2022-11-16 11:31:22,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:22,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:22,425 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:31:22,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548022760] [2022-11-16 11:31:22,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:31:22,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:31:22,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:31:22,427 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:31:22,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 11:31:22,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-16 11:31:22,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:31:22,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:31:22,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:24,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:31:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:26,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:26,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812512992] [2022-11-16 11:31:26,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:31:26,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548022760] [2022-11-16 11:31:26,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548022760] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:31:26,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:31:26,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2022-11-16 11:31:26,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238710316] [2022-11-16 11:31:26,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:31:26,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 11:31:26,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:26,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 11:31:26,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:31:26,863 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:29,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:29,200 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2022-11-16 11:31:29,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 11:31:29,201 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-16 11:31:29,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:29,202 INFO L225 Difference]: With dead ends: 138 [2022-11-16 11:31:29,202 INFO L226 Difference]: Without dead ends: 98 [2022-11-16 11:31:29,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 68 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=395, Invalid=1165, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 11:31:29,204 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 135 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:29,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 33 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 11:31:29,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-16 11:31:29,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2022-11-16 11:31:29,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 85 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:29,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2022-11-16 11:31:29,249 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 54 [2022-11-16 11:31:29,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:29,249 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2022-11-16 11:31:29,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:29,250 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2022-11-16 11:31:29,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 11:31:29,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:29,250 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:29,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-16 11:31:29,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 11:31:29,451 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:31:29,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:29,452 INFO L85 PathProgramCache]: Analyzing trace with hash -248505767, now seen corresponding path program 16 times [2022-11-16 11:31:29,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:29,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805454613] [2022-11-16 11:31:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:29,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:29,470 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:31:29,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506171091] [2022-11-16 11:31:29,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:31:29,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:31:29,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:31:29,472 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:31:29,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 11:31:29,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:31:29,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:31:29,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-16 11:31:29,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:30,846 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 15 treesize of output 11 [2022-11-16 11:31:31,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-16 11:31:32,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:32,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:31:32,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:32,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:31:32,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:32,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:31:33,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:33,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:31:33,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:33,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:31:34,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:34,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:31:34,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:34,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:31:35,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:31:35,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:31:35,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 11:31:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 38 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:31:35,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:31:41,429 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 324 treesize of output 312 [2022-11-16 11:31:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:44,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:44,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805454613] [2022-11-16 11:31:44,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:31:44,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506171091] [2022-11-16 11:31:44,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506171091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:31:44,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:31:44,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 30] total 53 [2022-11-16 11:31:44,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984759928] [2022-11-16 11:31:44,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:31:44,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-16 11:31:44,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:44,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-16 11:31:44,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=2176, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 11:31:44,622 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 53 states, 53 states have (on average 1.9622641509433962) internal successors, (104), 53 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:48,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:32:48,857 INFO L93 Difference]: Finished difference Result 272 states and 326 transitions. [2022-11-16 11:32:48,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-11-16 11:32:48,858 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9622641509433962) internal successors, (104), 53 states have internal predecessors, (104), 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 56 [2022-11-16 11:32:48,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:32:48,860 INFO L225 Difference]: With dead ends: 272 [2022-11-16 11:32:48,860 INFO L226 Difference]: Without dead ends: 263 [2022-11-16 11:32:48,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8446 ImplicationChecksByTransitivity, 69.3s TimeCoverageRelationStatistics Valid=4810, Invalid=21272, Unknown=0, NotChecked=0, Total=26082 [2022-11-16 11:32:48,866 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 573 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 3582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2251 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:32:48,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [573 Valid, 144 Invalid, 3582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1113 Invalid, 0 Unknown, 2251 Unchecked, 5.6s Time] [2022-11-16 11:32:48,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-16 11:32:48,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 149. [2022-11-16 11:32:48,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.1689189189189189) internal successors, (173), 148 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) [2022-11-16 11:32:48,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 173 transitions. [2022-11-16 11:32:48,924 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 173 transitions. Word has length 56 [2022-11-16 11:32:48,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:32:48,924 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 173 transitions. [2022-11-16 11:32:48,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9622641509433962) internal successors, (104), 53 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:48,925 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 173 transitions. [2022-11-16 11:32:48,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-16 11:32:48,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:32:48,925 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:48,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 11:32:49,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 11:32:49,126 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:32:49,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:49,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1180867949, now seen corresponding path program 17 times [2022-11-16 11:32:49,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:32:49,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861237898] [2022-11-16 11:32:49,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:32:49,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:32:49,146 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:32:49,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075446194] [2022-11-16 11:32:49,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:32:49,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:32:49,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:32:49,148 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:32:49,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 11:32:49,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-16 11:32:49,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:32:49,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:32:49,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:32:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 81 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:32:52,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:32:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 81 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:32:53,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:32:53,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861237898] [2022-11-16 11:32:53,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:32:53,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075446194] [2022-11-16 11:32:53,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075446194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:32:53,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:32:53,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 33 [2022-11-16 11:32:53,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815763782] [2022-11-16 11:32:53,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:32:53,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:32:53,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:32:53,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:32:53,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:32:53,917 INFO L87 Difference]: Start difference. First operand 149 states and 173 transitions. Second operand has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:58,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:32:58,401 INFO L93 Difference]: Finished difference Result 193 states and 228 transitions. [2022-11-16 11:32:58,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 11:32:58,401 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 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 58 [2022-11-16 11:32:58,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:32:58,403 INFO L225 Difference]: With dead ends: 193 [2022-11-16 11:32:58,403 INFO L226 Difference]: Without dead ends: 189 [2022-11-16 11:32:58,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 72 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=659, Invalid=2203, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 11:32:58,405 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 110 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:32:58,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 29 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-16 11:32:58,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-16 11:32:58,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 119. [2022-11-16 11:32:58,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.152542372881356) internal successors, (136), 118 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:58,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 136 transitions. [2022-11-16 11:32:58,467 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 136 transitions. Word has length 58 [2022-11-16 11:32:58,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:32:58,467 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 136 transitions. [2022-11-16 11:32:58,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:58,467 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 136 transitions. [2022-11-16 11:32:58,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-16 11:32:58,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:32:58,468 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:58,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-16 11:32:58,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 11:32:58,676 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:32:58,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:58,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1547469967, now seen corresponding path program 18 times [2022-11-16 11:32:58,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:32:58,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636734564] [2022-11-16 11:32:58,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:32:58,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:32:58,693 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:32:58,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338591514] [2022-11-16 11:32:58,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:32:58,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:32:58,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:32:58,695 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:32:58,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 11:32:59,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-11-16 11:32:59,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:32:59,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:32:59,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:33:01,524 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 145 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:33:01,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:33:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 145 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:33:03,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:33:03,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636734564] [2022-11-16 11:33:03,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:33:03,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338591514] [2022-11-16 11:33:03,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338591514] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:33:03,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:33:03,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 33 [2022-11-16 11:33:03,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695685417] [2022-11-16 11:33:03,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:33:03,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:33:03,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:33:03,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:33:03,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:33:03,636 INFO L87 Difference]: Start difference. First operand 119 states and 136 transitions. Second operand has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 33 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) [2022-11-16 11:33:06,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:33:06,477 INFO L93 Difference]: Finished difference Result 155 states and 180 transitions. [2022-11-16 11:33:06,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 11:33:06,478 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 33 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) Word has length 59 [2022-11-16 11:33:06,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:33:06,479 INFO L225 Difference]: With dead ends: 155 [2022-11-16 11:33:06,479 INFO L226 Difference]: Without dead ends: 81 [2022-11-16 11:33:06,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 74 SyntacticMatches, 11 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=473, Invalid=1419, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 11:33:06,480 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 173 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:33:06,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 30 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 11:33:06,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-16 11:33:06,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 68. [2022-11-16 11:33:06,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 67 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:06,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2022-11-16 11:33:06,517 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 59 [2022-11-16 11:33:06,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:33:06,518 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2022-11-16 11:33:06,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 33 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) [2022-11-16 11:33:06,518 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2022-11-16 11:33:06,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 11:33:06,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:33:06,519 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:33:06,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 11:33:06,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 11:33:06,726 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:33:06,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:33:06,726 INFO L85 PathProgramCache]: Analyzing trace with hash 44027667, now seen corresponding path program 19 times [2022-11-16 11:33:06,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:33:06,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486082654] [2022-11-16 11:33:06,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:33:06,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:33:06,746 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:33:06,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643982089] [2022-11-16 11:33:06,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:33:06,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:33:06,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:33:06,749 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:33:06,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 11:33:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:33:06,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-16 11:33:06,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:33:06,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-11-16 11:33:08,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:33:08,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:33:08,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:33:09,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:33:09,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:33:09,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:33:09,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:33:10,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:33:10,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:33:10,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:33:11,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:33:11,696 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 15 treesize of output 7 [2022-11-16 11:33:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 43 proven. 200 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:33:11,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:33:12,287 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1598 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1598) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 5)) is different from false [2022-11-16 11:33:12,324 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1598 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1598) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 8 |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2022-11-16 11:33:13,117 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1598 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1598) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 20 |c_ULTIMATE.start_main_~a~0#1.offset|)) 5)) is different from false [2022-11-16 11:33:13,167 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1598 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1598) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset| 24)) 5)) is different from false [2022-11-16 11:33:13,217 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1598 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1598) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 28 |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2022-11-16 11:33:13,265 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1598 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1598) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 32 (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2022-11-16 11:33:13,316 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1598 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1598) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 32 |c_ULTIMATE.start_main_~a~0#1.offset|)) 5)) is different from false [2022-11-16 11:33:20,684 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-16 11:33:20,684 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2022-11-16 11:33:20,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:33:20,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2022-11-16 11:33:20,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2022-11-16 11:33:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 43 proven. 90 refuted. 0 times theorem prover too weak. 2 trivial. 110 not checked. [2022-11-16 11:33:23,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:33:23,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486082654] [2022-11-16 11:33:23,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:33:23,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643982089] [2022-11-16 11:33:23,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643982089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:33:23,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:33:23,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 47 [2022-11-16 11:33:23,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109075674] [2022-11-16 11:33:23,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:33:23,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-16 11:33:23,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:33:23,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-16 11:33:23,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1424, Unknown=17, NotChecked=574, Total=2162 [2022-11-16 11:33:23,273 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 47 states, 47 states have (on average 2.297872340425532) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:32,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:33:32,408 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2022-11-16 11:33:32,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 11:33:32,409 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.297872340425532) internal successors, (108), 47 states have internal predecessors, (108), 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 [2022-11-16 11:33:32,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:33:32,410 INFO L225 Difference]: With dead ends: 82 [2022-11-16 11:33:32,410 INFO L226 Difference]: Without dead ends: 73 [2022-11-16 11:33:32,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 76 SyntacticMatches, 13 SemanticMatches, 55 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=204, Invalid=2257, Unknown=17, NotChecked=714, Total=3192 [2022-11-16 11:33:32,411 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 615 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:33:32,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 137 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1235 Invalid, 0 Unknown, 615 Unchecked, 6.1s Time] [2022-11-16 11:33:32,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-16 11:33:32,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-11-16 11:33:32,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:32,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2022-11-16 11:33:32,442 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 61 [2022-11-16 11:33:32,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:33:32,443 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2022-11-16 11:33:32,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.297872340425532) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:32,443 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2022-11-16 11:33:32,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 11:33:32,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:33:32,444 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:33:32,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-16 11:33:32,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:33:32,646 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:33:32,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:33:32,646 INFO L85 PathProgramCache]: Analyzing trace with hash -377865265, now seen corresponding path program 20 times [2022-11-16 11:33:32,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:33:32,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62860850] [2022-11-16 11:33:32,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:33:32,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:33:32,667 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:33:32,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508915014] [2022-11-16 11:33:32,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:33:32,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:33:32,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:33:32,669 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:33:32,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 11:33:32,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:33:32,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:33:32,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-16 11:33:32,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:33:34,032 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 15 treesize of output 11 [2022-11-16 11:33:34,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:33:34,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:33:34,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:33:34,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:33:35,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:33:35,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:33:35,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:33:35,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:33:35,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:33:35,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:33:36,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:33:36,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:33:36,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:33:36,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:33:37,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:33:37,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:33:37,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:33:37,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:33:37,758 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 15 treesize of output 7 [2022-11-16 11:33:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 62 proven. 176 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:33:37,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:33:38,343 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1705 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1705) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) is different from false [2022-11-16 11:33:39,134 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1705 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1705) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) 5)) is different from false [2022-11-16 11:33:39,971 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1705 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1705) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 28 |c_ULTIMATE.start_main_~a~0#1.offset|)) 5)) is different from false [2022-11-16 11:33:59,086 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_601| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_601|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_600| Int) (v_ArrVal_1697 Int) (v_ArrVal_1696 Int) (v_ArrVal_1705 (Array Int Int))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_601| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1696) (+ (* |v_ULTIMATE.start_main_~i~0#1_600| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1697)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1705) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 28 |c_ULTIMATE.start_main_~a~0#1.offset|)) 5) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_601| 1) |v_ULTIMATE.start_main_~i~0#1_600|)))))) is different from false [2022-11-16 11:33:59,267 INFO L321 Elim1Store]: treesize reduction 94, result has 28.2 percent of original size [2022-11-16 11:33:59,268 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 49 [2022-11-16 11:33:59,308 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:33:59,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2022-11-16 11:33:59,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2022-11-16 11:34:01,650 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 61 proven. 121 refuted. 0 times theorem prover too weak. 7 trivial. 56 not checked. [2022-11-16 11:34:01,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:34:01,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62860850] [2022-11-16 11:34:01,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:34:01,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508915014] [2022-11-16 11:34:01,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508915014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:34:01,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:34:01,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 46 [2022-11-16 11:34:01,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444319304] [2022-11-16 11:34:01,651 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:34:01,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 11:34:01,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:34:01,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 11:34:01,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1520, Unknown=56, NotChecked=332, Total=2070 [2022-11-16 11:34:01,653 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:05,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:34:05,958 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2022-11-16 11:34:05,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 11:34:05,959 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 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 [2022-11-16 11:34:05,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:34:05,960 INFO L225 Difference]: With dead ends: 83 [2022-11-16 11:34:05,960 INFO L226 Difference]: Without dead ends: 71 [2022-11-16 11:34:05,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 77 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=171, Invalid=1595, Unknown=56, NotChecked=340, Total=2162 [2022-11-16 11:34:05,961 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 35 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 465 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:34:05,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 146 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 726 Invalid, 0 Unknown, 465 Unchecked, 3.6s Time] [2022-11-16 11:34:05,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-16 11:34:05,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-11-16 11:34:05,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 70 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:05,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2022-11-16 11:34:05,996 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 61 [2022-11-16 11:34:05,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:34:05,996 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2022-11-16 11:34:05,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:05,996 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2022-11-16 11:34:05,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 11:34:05,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:34:05,997 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:34:06,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-16 11:34:06,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 11:34:06,198 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:34:06,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:34:06,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1915894381, now seen corresponding path program 21 times [2022-11-16 11:34:06,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:34:06,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899604608] [2022-11-16 11:34:06,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:34:06,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:34:06,219 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:34:06,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411150130] [2022-11-16 11:34:06,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:34:06,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:34:06,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:34:06,220 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:34:06,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 11:34:06,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-16 11:34:06,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:34:06,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-16 11:34:06,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:34:06,962 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 15 treesize of output 11 [2022-11-16 11:34:07,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 28 treesize of output 27 [2022-11-16 11:34:07,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 28 treesize of output 27 [2022-11-16 11:34:07,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 28 treesize of output 27 [2022-11-16 11:34:08,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:34:08,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:34:08,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:34:08,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:34:08,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:34:08,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:34:08,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:34:08,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:34:08,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:34:08,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:34:08,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:34:08,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:34:09,123 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:34:09,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-11-16 11:34:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 52 proven. 117 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-16 11:34:10,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:34:14,472 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1813 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_630| Int) (v_ArrVal_1807 Int)) (let ((.cse0 (+ 3 |v_ULTIMATE.start_main_~i~0#1_630|))) (or (< .cse0 |c_ULTIMATE.start_main_~i~0#1|) (< |c_ULTIMATE.start_main_~i~0#1| .cse0) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1807)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1813) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_630| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 5)))) is different from false [2022-11-16 11:34:23,989 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1813 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_630| Int) (v_ArrVal_1807 Int)) (let ((.cse0 (+ |v_ULTIMATE.start_main_~i~0#1_630| 1))) (or (= 5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 8 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1807)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1813) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_630| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (< .cse0 |c_ULTIMATE.start_main_~i~0#1|) (< |c_ULTIMATE.start_main_~i~0#1| .cse0)))) is different from false [2022-11-16 11:34:33,458 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:34:33,458 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 53 [2022-11-16 11:34:33,517 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-16 11:34:33,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2022-11-16 11:34:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 6 proven. 124 refuted. 20 times theorem prover too weak. 76 trivial. 19 not checked. [2022-11-16 11:34:39,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:34:39,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899604608] [2022-11-16 11:34:39,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:34:39,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411150130] [2022-11-16 11:34:39,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411150130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:34:39,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:34:39,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 28 [2022-11-16 11:34:39,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572143774] [2022-11-16 11:34:39,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:34:39,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 11:34:39,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:34:39,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 11:34:39,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=538, Unknown=24, NotChecked=98, Total=756 [2022-11-16 11:34:39,843 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:47,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:34:47,152 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2022-11-16 11:34:47,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:34:47,153 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-16 11:34:47,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:34:47,153 INFO L225 Difference]: With dead ends: 88 [2022-11-16 11:34:47,154 INFO L226 Difference]: Without dead ends: 84 [2022-11-16 11:34:47,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=212, Invalid=1104, Unknown=24, NotChecked=142, Total=1482 [2022-11-16 11:34:47,155 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:34:47,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 46 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 190 Invalid, 0 Unknown, 255 Unchecked, 1.0s Time] [2022-11-16 11:34:47,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-16 11:34:47,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2022-11-16 11:34:47,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.123456790123457) internal successors, (91), 81 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:47,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2022-11-16 11:34:47,195 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 61 [2022-11-16 11:34:47,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:34:47,195 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2022-11-16 11:34:47,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:47,196 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2022-11-16 11:34:47,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 11:34:47,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:34:47,197 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:34:47,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-16 11:34:47,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:34:47,399 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:34:47,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:34:47,400 INFO L85 PathProgramCache]: Analyzing trace with hash -670852009, now seen corresponding path program 22 times [2022-11-16 11:34:47,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:34:47,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991768476] [2022-11-16 11:34:47,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:34:47,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:34:47,423 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:34:47,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171764066] [2022-11-16 11:34:47,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:34:47,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:34:47,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:34:47,425 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:34:47,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-16 11:34:47,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:34:47,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:34:47,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:34:47,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:34:50,655 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 176 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:34:50,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:34:53,234 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 176 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:34:53,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:34:53,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991768476] [2022-11-16 11:34:53,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:34:53,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171764066] [2022-11-16 11:34:53,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171764066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:34:53,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:34:53,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 36 [2022-11-16 11:34:53,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602499571] [2022-11-16 11:34:53,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:34:53,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 11:34:53,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:34:53,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 11:34:53,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 11:34:53,240 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:56,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:34:56,725 INFO L93 Difference]: Finished difference Result 168 states and 193 transitions. [2022-11-16 11:34:56,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 11:34:56,725 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 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 64 [2022-11-16 11:34:56,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:34:56,727 INFO L225 Difference]: With dead ends: 168 [2022-11-16 11:34:56,727 INFO L226 Difference]: Without dead ends: 102 [2022-11-16 11:34:56,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 80 SyntacticMatches, 12 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=558, Invalid=1698, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 11:34:56,728 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 118 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:34:56,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 50 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-16 11:34:56,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-16 11:34:56,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 84. [2022-11-16 11:34:56,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 83 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:56,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2022-11-16 11:34:56,776 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 64 [2022-11-16 11:34:56,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:34:56,777 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2022-11-16 11:34:56,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:56,777 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2022-11-16 11:34:56,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-16 11:34:56,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:34:56,777 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:34:56,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-11-16 11:34:56,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:34:56,981 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:34:56,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:34:56,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1942349355, now seen corresponding path program 23 times [2022-11-16 11:34:56,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:34:56,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10591793] [2022-11-16 11:34:56,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:34:56,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:34:57,007 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:34:57,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1249277856] [2022-11-16 11:34:57,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:34:57,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:34:57,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:34:57,009 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:34:57,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-16 11:34:58,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-16 11:34:58,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:34:58,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-16 11:34:58,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:34:58,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-11-16 11:34:59,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:35:00,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:35:00,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:35:00,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:35:01,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:35:01,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:35:01,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:35:02,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:35:02,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:35:02,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:35:03,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:35:03,682 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 15 treesize of output 7 [2022-11-16 11:35:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 48 proven. 247 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:35:03,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:35:04,336 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2028 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_2028) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 5)) is different from false [2022-11-16 11:35:05,209 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2028 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_2028) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) 5)) is different from false [2022-11-16 11:35:06,511 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2028 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_2028) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 32 (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 5)) is different from false [2022-11-16 11:35:06,570 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2028 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_2028) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 36 |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2022-11-16 11:35:08,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:35:08,306 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 38 [2022-11-16 11:35:08,346 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:35:08,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2022-11-16 11:35:08,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2022-11-16 11:35:11,543 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 48 proven. 166 refuted. 0 times theorem prover too weak. 2 trivial. 81 not checked. [2022-11-16 11:35:11,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:11,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10591793] [2022-11-16 11:35:11,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:35:11,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249277856] [2022-11-16 11:35:11,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249277856] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:35:11,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:35:11,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 51 [2022-11-16 11:35:11,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115683837] [2022-11-16 11:35:11,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:35:11,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-16 11:35:11,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:11,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-16 11:35:11,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1953, Unknown=40, NotChecked=372, Total=2550 [2022-11-16 11:35:11,546 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand has 51 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 51 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:20,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:20,153 INFO L93 Difference]: Finished difference Result 149 states and 170 transitions. [2022-11-16 11:35:20,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 11:35:20,154 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 51 states have internal predecessors, (118), 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 66 [2022-11-16 11:35:20,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:20,155 INFO L225 Difference]: With dead ends: 149 [2022-11-16 11:35:20,155 INFO L226 Difference]: Without dead ends: 131 [2022-11-16 11:35:20,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 81 SyntacticMatches, 11 SemanticMatches, 60 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=248, Invalid=3034, Unknown=40, NotChecked=460, Total=3782 [2022-11-16 11:35:20,156 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 548 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:20,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 155 Invalid, 1689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1107 Invalid, 0 Unknown, 548 Unchecked, 5.3s Time] [2022-11-16 11:35:20,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-16 11:35:20,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 119. [2022-11-16 11:35:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.1016949152542372) internal successors, (130), 118 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2022-11-16 11:35:20,218 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 66 [2022-11-16 11:35:20,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:20,218 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2022-11-16 11:35:20,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 51 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:20,219 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2022-11-16 11:35:20,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-16 11:35:20,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:20,219 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:20,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-16 11:35:20,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:35:20,428 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:35:20,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:20,429 INFO L85 PathProgramCache]: Analyzing trace with hash -321585135, now seen corresponding path program 24 times [2022-11-16 11:35:20,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:20,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274632569] [2022-11-16 11:35:20,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:20,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:20,450 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:35:20,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436326347] [2022-11-16 11:35:20,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:35:20,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:35:20,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:35:20,452 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:35:20,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-16 11:35:21,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-11-16 11:35:21,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:35:21,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-16 11:35:21,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:35:21,681 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 15 treesize of output 11 [2022-11-16 11:35:21,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 28 treesize of output 27 [2022-11-16 11:35:22,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 28 treesize of output 27 [2022-11-16 11:35:22,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 28 treesize of output 27 [2022-11-16 11:35:22,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-16 11:35:23,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:35:23,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:35:23,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:35:23,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:35:24,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:35:24,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:35:24,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:35:24,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:35:24,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:35:24,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:35:25,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:35:25,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:35:25,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:35:25,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-11-16 11:35:26,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:35:26,589 INFO L321 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2022-11-16 11:35:26,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-16 11:35:28,412 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 65 proven. 196 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 11:35:28,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:35:41,171 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:35:41,171 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 1 new quantified variables, introduced 5 case distinctions, treesize of input 114 treesize of output 90 [2022-11-16 11:35:41,235 INFO L321 Elim1Store]: treesize reduction 17, result has 19.0 percent of original size [2022-11-16 11:35:41,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 50 [2022-11-16 11:35:41,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2022-11-16 11:35:41,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 4 [2022-11-16 11:35:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:35:42,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:42,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274632569] [2022-11-16 11:35:42,874 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:35:42,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436326347] [2022-11-16 11:35:42,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436326347] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:35:42,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:35:42,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 35] total 61 [2022-11-16 11:35:42,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113487046] [2022-11-16 11:35:42,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:35:42,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-16 11:35:42,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:42,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-16 11:35:42,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=3120, Unknown=7, NotChecked=0, Total=3660 [2022-11-16 11:35:42,877 INFO L87 Difference]: Start difference. First operand 119 states and 130 transitions. Second operand has 61 states, 61 states have (on average 1.8032786885245902) internal successors, (110), 61 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:04,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:04,347 INFO L93 Difference]: Finished difference Result 179 states and 206 transitions. [2022-11-16 11:36:04,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-16 11:36:04,348 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.8032786885245902) internal successors, (110), 61 states have internal predecessors, (110), 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 66 [2022-11-16 11:36:04,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:04,349 INFO L225 Difference]: With dead ends: 179 [2022-11-16 11:36:04,349 INFO L226 Difference]: Without dead ends: 175 [2022-11-16 11:36:04,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3144 ImplicationChecksByTransitivity, 35.5s TimeCoverageRelationStatistics Valid=1403, Invalid=9503, Unknown=14, NotChecked=0, Total=10920 [2022-11-16 11:36:04,352 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 162 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 984 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:04,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 159 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 404 Invalid, 0 Unknown, 984 Unchecked, 2.1s Time] [2022-11-16 11:36:04,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-16 11:36:04,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 148. [2022-11-16 11:36:04,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.1428571428571428) internal successors, (168), 147 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:04,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 168 transitions. [2022-11-16 11:36:04,459 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 168 transitions. Word has length 66 [2022-11-16 11:36:04,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:04,460 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 168 transitions. [2022-11-16 11:36:04,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.8032786885245902) internal successors, (110), 61 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:04,460 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 168 transitions. [2022-11-16 11:36:04,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 11:36:04,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:04,461 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:04,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:04,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-16 11:36:04,662 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:36:04,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:04,662 INFO L85 PathProgramCache]: Analyzing trace with hash 214380499, now seen corresponding path program 25 times [2022-11-16 11:36:04,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:04,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537516330] [2022-11-16 11:36:04,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:04,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:04,686 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:36:04,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846405492] [2022-11-16 11:36:04,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:36:04,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:04,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:04,688 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:04,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-16 11:36:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:04,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:36:04,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 121 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:08,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:10,785 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 121 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:10,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:10,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537516330] [2022-11-16 11:36:10,786 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:36:10,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846405492] [2022-11-16 11:36:10,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846405492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:10,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:36:10,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 39 [2022-11-16 11:36:10,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218735106] [2022-11-16 11:36:10,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:10,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 11:36:10,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:10,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 11:36:10,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 11:36:10,788 INFO L87 Difference]: Start difference. First operand 148 states and 168 transitions. Second operand has 39 states, 39 states have (on average 2.641025641025641) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:17,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:17,909 INFO L93 Difference]: Finished difference Result 191 states and 222 transitions. [2022-11-16 11:36:17,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 11:36:17,910 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.641025641025641) internal successors, (103), 39 states have internal predecessors, (103), 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 68 [2022-11-16 11:36:17,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:17,911 INFO L225 Difference]: With dead ends: 191 [2022-11-16 11:36:17,911 INFO L226 Difference]: Without dead ends: 187 [2022-11-16 11:36:17,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 84 SyntacticMatches, 13 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=909, Invalid=3123, Unknown=0, NotChecked=0, Total=4032 [2022-11-16 11:36:17,912 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 123 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:17,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 29 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-16 11:36:17,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-16 11:36:18,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 155. [2022-11-16 11:36:18,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.1428571428571428) internal successors, (176), 154 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 176 transitions. [2022-11-16 11:36:18,008 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 176 transitions. Word has length 68 [2022-11-16 11:36:18,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:18,008 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 176 transitions. [2022-11-16 11:36:18,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.641025641025641) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:18,008 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 176 transitions. [2022-11-16 11:36:18,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 11:36:18,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:18,009 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:18,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:18,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-16 11:36:18,210 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:36:18,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:18,210 INFO L85 PathProgramCache]: Analyzing trace with hash -769310123, now seen corresponding path program 26 times [2022-11-16 11:36:18,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:18,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315811419] [2022-11-16 11:36:18,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:18,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:18,231 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:36:18,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811674337] [2022-11-16 11:36:18,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:36:18,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:18,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:18,233 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:18,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-16 11:36:18,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:36:18,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:18,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:36:18,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 210 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:21,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:24,492 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 210 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:24,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:24,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315811419] [2022-11-16 11:36:24,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:36:24,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811674337] [2022-11-16 11:36:24,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811674337] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:24,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:36:24,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 39 [2022-11-16 11:36:24,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290079484] [2022-11-16 11:36:24,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:24,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 11:36:24,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:24,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 11:36:24,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 11:36:24,496 INFO L87 Difference]: Start difference. First operand 155 states and 176 transitions. Second operand has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:27,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:27,824 INFO L93 Difference]: Finished difference Result 222 states and 265 transitions. [2022-11-16 11:36:27,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 11:36:27,826 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 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 69 [2022-11-16 11:36:27,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:27,827 INFO L225 Difference]: With dead ends: 222 [2022-11-16 11:36:27,827 INFO L226 Difference]: Without dead ends: 135 [2022-11-16 11:36:27,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 86 SyntacticMatches, 13 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=650, Invalid=2002, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 11:36:27,828 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 155 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:27,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 52 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-16 11:36:27,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-16 11:36:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 116. [2022-11-16 11:36:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.173913043478261) internal successors, (135), 115 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 135 transitions. [2022-11-16 11:36:27,882 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 135 transitions. Word has length 69 [2022-11-16 11:36:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:27,882 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 135 transitions. [2022-11-16 11:36:27,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:27,882 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 135 transitions. [2022-11-16 11:36:27,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 11:36:27,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:27,882 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:27,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:28,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:28,083 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:36:28,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:28,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1953989527, now seen corresponding path program 27 times [2022-11-16 11:36:28,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:28,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558882055] [2022-11-16 11:36:28,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:28,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:28,107 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:36:28,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646907935] [2022-11-16 11:36:28,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:36:28,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:28,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:28,109 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:28,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-16 11:36:29,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-16 11:36:29,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:29,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 11:36:29,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:29,539 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 15 treesize of output 11 [2022-11-16 11:36:29,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 28 treesize of output 27 [2022-11-16 11:36:30,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:36:30,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:36:30,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:36:30,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:36:30,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:36:30,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:36:30,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:36:30,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:36:30,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:36:30,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:36:31,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:36:31,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:36:31,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:36:31,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:36:31,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:36:31,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:36:31,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:36:31,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:36:31,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:36:31,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:36:31,899 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:36:31,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-11-16 11:36:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 42 proven. 86 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-11-16 11:36:32,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:38,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:36:38,205 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 40 [2022-11-16 11:36:38,247 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-16 11:36:38,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2022-11-16 11:36:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 10 proven. 107 refuted. 11 times theorem prover too weak. 226 trivial. 0 not checked. [2022-11-16 11:36:42,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:42,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558882055] [2022-11-16 11:36:42,565 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:36:42,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646907935] [2022-11-16 11:36:42,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646907935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:42,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:36:42,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2022-11-16 11:36:42,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101894651] [2022-11-16 11:36:42,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:42,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:36:42,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:42,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:36:42,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=329, Unknown=13, NotChecked=0, Total=420 [2022-11-16 11:36:42,567 INFO L87 Difference]: Start difference. First operand 116 states and 135 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:45,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:45,764 INFO L93 Difference]: Finished difference Result 120 states and 138 transitions. [2022-11-16 11:36:45,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:36:45,765 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-16 11:36:45,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:45,766 INFO L225 Difference]: With dead ends: 120 [2022-11-16 11:36:45,766 INFO L226 Difference]: Without dead ends: 116 [2022-11-16 11:36:45,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 118 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=127, Invalid=509, Unknown=14, NotChecked=0, Total=650 [2022-11-16 11:36:45,767 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:45,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 40 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 97 Invalid, 0 Unknown, 51 Unchecked, 0.5s Time] [2022-11-16 11:36:45,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-16 11:36:45,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2022-11-16 11:36:45,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1574074074074074) internal successors, (125), 108 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:45,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2022-11-16 11:36:45,829 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 71 [2022-11-16 11:36:45,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:45,830 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2022-11-16 11:36:45,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:45,830 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2022-11-16 11:36:45,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 11:36:45,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:45,831 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:45,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:46,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:46,040 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:36:46,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:46,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1532096595, now seen corresponding path program 28 times [2022-11-16 11:36:46,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:46,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865455457] [2022-11-16 11:36:46,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:46,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:46,062 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:36:46,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339464029] [2022-11-16 11:36:46,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:36:46,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:46,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:46,064 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:46,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-16 11:36:46,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:36:46,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:46,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-16 11:36:46,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:48,062 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 15 treesize of output 11 [2022-11-16 11:36:48,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-16 11:36:48,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-16 11:36:49,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:36:49,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:36:50,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:36:50,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:36:50,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:36:50,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:36:51,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:36:51,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:36:51,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:36:51,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:36:52,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:36:52,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:36:52,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:36:52,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:36:53,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:36:53,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:36:53,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:36:53,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:36:54,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:36:54,169 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:36:54,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 11:36:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 77 proven. 270 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:36:54,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:03,855 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 324 treesize of output 312 [2022-11-16 11:37:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:08,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:08,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865455457] [2022-11-16 11:37:08,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:37:08,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339464029] [2022-11-16 11:37:08,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339464029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:08,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:37:08,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 36] total 64 [2022-11-16 11:37:08,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121147122] [2022-11-16 11:37:08,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:08,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-16 11:37:08,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:08,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-16 11:37:08,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=823, Invalid=3209, Unknown=0, NotChecked=0, Total=4032 [2022-11-16 11:37:08,800 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand has 64 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:13,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:38:13,242 INFO L93 Difference]: Finished difference Result 341 states and 422 transitions. [2022-11-16 11:38:13,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-11-16 11:38:13,242 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 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 71 [2022-11-16 11:38:13,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:38:13,244 INFO L225 Difference]: With dead ends: 341 [2022-11-16 11:38:13,244 INFO L226 Difference]: Without dead ends: 315 [2022-11-16 11:38:13,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6258 ImplicationChecksByTransitivity, 74.3s TimeCoverageRelationStatistics Valid=4014, Invalid=17156, Unknown=0, NotChecked=0, Total=21170 [2022-11-16 11:38:13,247 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 325 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 3913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2480 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:38:13,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 158 Invalid, 3913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1278 Invalid, 0 Unknown, 2480 Unchecked, 6.5s Time] [2022-11-16 11:38:13,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-11-16 11:38:13,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 274. [2022-11-16 11:38:13,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.2344322344322345) internal successors, (337), 273 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:13,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 337 transitions. [2022-11-16 11:38:13,424 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 337 transitions. Word has length 71 [2022-11-16 11:38:13,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:38:13,424 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 337 transitions. [2022-11-16 11:38:13,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:13,425 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 337 transitions. [2022-11-16 11:38:13,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 11:38:13,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:38:13,426 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:13,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:13,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-16 11:38:13,629 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:38:13,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:13,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1696632983, now seen corresponding path program 29 times [2022-11-16 11:38:13,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:13,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108539035] [2022-11-16 11:38:13,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:13,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:13,651 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:38:13,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627299664] [2022-11-16 11:38:13,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:38:13,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:13,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:13,654 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:13,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-16 11:38:18,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-11-16 11:38:18,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:38:18,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-16 11:38:18,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:18,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-11-16 11:38:19,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:38:19,823 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:38:19,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:38:20,075 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:38:20,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:38:20,345 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:38:20,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:38:20,625 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:38:20,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:38:20,882 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:38:20,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:38:21,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:38:21,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:38:21,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:38:22,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:38:22,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:38:22,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:38:23,039 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 [2022-11-16 11:38:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 129 proven. 185 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 11:38:23,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:23,638 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2746 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_2746) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) is different from false [2022-11-16 11:38:24,033 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2746 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_2746) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 12 |c_ULTIMATE.start_main_~a~0#1.offset|)) 5)) is different from false [2022-11-16 11:38:24,082 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2746 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_2746) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 16 |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2022-11-16 11:38:24,857 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2746 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_2746) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24)))) is different from false [2022-11-16 11:38:34,266 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2738 Int) (v_ArrVal_2746 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_973| Int) (v_ArrVal_2740 Int)) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2738) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_973| 4)) v_ArrVal_2740)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_2746) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24)) 5) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_973|)))) is different from false [2022-11-16 11:38:36,421 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_974| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_974|)) (forall ((v_ArrVal_2738 Int) (v_ArrVal_2746 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_973| Int) (v_ArrVal_2740 Int)) (or (= 5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_974| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2738) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_973| 4)) v_ArrVal_2740)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_2746) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_974| 1) |v_ULTIMATE.start_main_~i~0#1_973|)))))) is different from false [2022-11-16 11:38:38,474 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2738 Int) (|v_ULTIMATE.start_main_~i~0#1_974| Int) (v_ArrVal_2746 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_973| Int) (v_ArrVal_2740 Int) (v_ArrVal_2736 Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_974|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_974| 1) |v_ULTIMATE.start_main_~i~0#1_973|)) (= 5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2736) (+ (* |v_ULTIMATE.start_main_~i~0#1_974| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2738) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_973| 4)) v_ArrVal_2740)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_2746) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24))))) is different from false [2022-11-16 11:38:40,549 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_975| Int)) (or (forall ((v_ArrVal_2738 Int) (|v_ULTIMATE.start_main_~i~0#1_974| Int) (v_ArrVal_2746 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_973| Int) (v_ArrVal_2740 Int) (v_ArrVal_2736 Int)) (or (= 5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_975| 4)) v_ArrVal_2736) (+ (* |v_ULTIMATE.start_main_~i~0#1_974| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2738) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_973| 4)) v_ArrVal_2740)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_2746) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_974| 1) |v_ULTIMATE.start_main_~i~0#1_973|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_975| 1) |v_ULTIMATE.start_main_~i~0#1_974|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_975|)))) is different from false [2022-11-16 11:38:42,611 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2738 Int) (|v_ULTIMATE.start_main_~i~0#1_974| Int) (v_ArrVal_2746 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_973| Int) (v_ArrVal_2740 Int) (v_ArrVal_2733 Int) (|v_ULTIMATE.start_main_~i~0#1_975| Int) (v_ArrVal_2736 Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_975|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_974| 1) |v_ULTIMATE.start_main_~i~0#1_973|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_975| 1) |v_ULTIMATE.start_main_~i~0#1_974|)) (= 5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2733) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_975| 4)) v_ArrVal_2736) (+ (* |v_ULTIMATE.start_main_~i~0#1_974| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2738) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_973| 4)) v_ArrVal_2740)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_2746) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24))))) is different from false [2022-11-16 11:38:44,689 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_976| Int)) (or (forall ((v_ArrVal_2738 Int) (|v_ULTIMATE.start_main_~i~0#1_974| Int) (v_ArrVal_2746 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_973| Int) (v_ArrVal_2740 Int) (v_ArrVal_2733 Int) (|v_ULTIMATE.start_main_~i~0#1_975| Int) (v_ArrVal_2736 Int)) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_976| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2733) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_975| 4)) v_ArrVal_2736) (+ (* |v_ULTIMATE.start_main_~i~0#1_974| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2738) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_973| 4)) v_ArrVal_2740)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_2746) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24)) 5) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_976| 1) |v_ULTIMATE.start_main_~i~0#1_975|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_974| 1) |v_ULTIMATE.start_main_~i~0#1_973|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_975| 1) |v_ULTIMATE.start_main_~i~0#1_974|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_976|)))) is different from false [2022-11-16 11:38:46,771 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2738 Int) (|v_ULTIMATE.start_main_~i~0#1_974| Int) (v_ArrVal_2746 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_973| Int) (v_ArrVal_2740 Int) (v_ArrVal_2731 Int) (v_ArrVal_2733 Int) (|v_ULTIMATE.start_main_~i~0#1_976| Int) (|v_ULTIMATE.start_main_~i~0#1_975| Int) (v_ArrVal_2736 Int)) (or (= 5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2731) (+ (* |v_ULTIMATE.start_main_~i~0#1_976| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2733) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_975| 4)) v_ArrVal_2736) (+ (* |v_ULTIMATE.start_main_~i~0#1_974| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2738) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_973| 4)) v_ArrVal_2740)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_2746) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_976| 1) |v_ULTIMATE.start_main_~i~0#1_975|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_974| 1) |v_ULTIMATE.start_main_~i~0#1_973|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_975| 1) |v_ULTIMATE.start_main_~i~0#1_974|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_976|)))) is different from false [2022-11-16 11:38:48,885 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_977| Int)) (or (forall ((v_ArrVal_2738 Int) (|v_ULTIMATE.start_main_~i~0#1_974| Int) (v_ArrVal_2746 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_973| Int) (v_ArrVal_2740 Int) (v_ArrVal_2731 Int) (v_ArrVal_2733 Int) (|v_ULTIMATE.start_main_~i~0#1_976| Int) (|v_ULTIMATE.start_main_~i~0#1_975| Int) (v_ArrVal_2736 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_976| 1) |v_ULTIMATE.start_main_~i~0#1_975|)) (= 5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_977| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2731) (+ (* |v_ULTIMATE.start_main_~i~0#1_976| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2733) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_975| 4)) v_ArrVal_2736) (+ (* |v_ULTIMATE.start_main_~i~0#1_974| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2738) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_973| 4)) v_ArrVal_2740)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_2746) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_974| 1) |v_ULTIMATE.start_main_~i~0#1_973|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_977| 1) |v_ULTIMATE.start_main_~i~0#1_976|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_975| 1) |v_ULTIMATE.start_main_~i~0#1_974|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_977|)))) is different from false [2022-11-16 11:38:49,437 INFO L321 Elim1Store]: treesize reduction 585, result has 11.1 percent of original size [2022-11-16 11:38:49,438 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 1 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 85 [2022-11-16 11:38:49,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:38:49,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2022-11-16 11:38:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 113 proven. 58 refuted. 9 times theorem prover too weak. 40 trivial. 134 not checked. [2022-11-16 11:38:49,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:49,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108539035] [2022-11-16 11:38:49,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:38:49,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627299664] [2022-11-16 11:38:49,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627299664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:49,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:38:49,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29] total 44 [2022-11-16 11:38:49,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167050769] [2022-11-16 11:38:49,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:49,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-16 11:38:49,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:49,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-16 11:38:49,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=866, Unknown=33, NotChecked=852, Total=1892 [2022-11-16 11:38:49,838 INFO L87 Difference]: Start difference. First operand 274 states and 337 transitions. Second operand has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:00,334 WARN L233 SmtUtils]: Spent 7.30s on a formula simplification. DAG size of input: 53 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:39:05,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:39:05,469 INFO L93 Difference]: Finished difference Result 302 states and 371 transitions. [2022-11-16 11:39:05,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 11:39:05,470 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 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 71 [2022-11-16 11:39:05,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:39:05,471 INFO L225 Difference]: With dead ends: 302 [2022-11-16 11:39:05,471 INFO L226 Difference]: Without dead ends: 238 [2022-11-16 11:39:05,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 97 SyntacticMatches, 14 SemanticMatches, 54 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=229, Invalid=1678, Unknown=33, NotChecked=1140, Total=3080 [2022-11-16 11:39:05,472 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 53 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 903 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:39:05,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 112 Invalid, 1957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1010 Invalid, 0 Unknown, 903 Unchecked, 4.9s Time] [2022-11-16 11:39:05,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-16 11:39:05,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 227. [2022-11-16 11:39:05,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.1902654867256637) internal successors, (269), 226 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:05,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 269 transitions. [2022-11-16 11:39:05,629 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 269 transitions. Word has length 71 [2022-11-16 11:39:05,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:39:05,629 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 269 transitions. [2022-11-16 11:39:05,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:05,629 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 269 transitions. [2022-11-16 11:39:05,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 11:39:05,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:39:05,630 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:39:05,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-16 11:39:05,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-16 11:39:05,831 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:39:05,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:39:05,831 INFO L85 PathProgramCache]: Analyzing trace with hash -626931945, now seen corresponding path program 30 times [2022-11-16 11:39:05,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:39:05,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917833907] [2022-11-16 11:39:05,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:39:05,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:39:05,860 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:39:05,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999876365] [2022-11-16 11:39:05,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:39:05,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:39:05,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:39:05,864 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:39:05,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-16 11:39:07,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-11-16 11:39:07,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:39:07,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:39:07,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:39:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 144 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:10,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:39:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 144 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:13,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:39:13,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917833907] [2022-11-16 11:39:13,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:39:13,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999876365] [2022-11-16 11:39:13,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999876365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:39:13,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:39:13,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 42 [2022-11-16 11:39:13,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508479487] [2022-11-16 11:39:13,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:39:13,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-16 11:39:13,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:39:13,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-16 11:39:13,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 11:39:13,427 INFO L87 Difference]: Start difference. First operand 227 states and 269 transitions. Second operand has 42 states, 42 states have (on average 2.642857142857143) internal successors, (111), 42 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:20,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:39:20,261 INFO L93 Difference]: Finished difference Result 282 states and 337 transitions. [2022-11-16 11:39:20,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-16 11:39:20,262 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.642857142857143) internal successors, (111), 42 states have internal predecessors, (111), 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 73 [2022-11-16 11:39:20,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:39:20,263 INFO L225 Difference]: With dead ends: 282 [2022-11-16 11:39:20,263 INFO L226 Difference]: Without dead ends: 278 [2022-11-16 11:39:20,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 90 SyntacticMatches, 14 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1049, Invalid=3643, Unknown=0, NotChecked=0, Total=4692 [2022-11-16 11:39:20,264 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 149 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:39:20,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 37 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-16 11:39:20,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-16 11:39:20,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 174. [2022-11-16 11:39:20,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.1734104046242775) internal successors, (203), 173 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:20,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 203 transitions. [2022-11-16 11:39:20,417 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 203 transitions. Word has length 73 [2022-11-16 11:39:20,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:39:20,418 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 203 transitions. [2022-11-16 11:39:20,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.642857142857143) internal successors, (111), 42 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:20,418 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 203 transitions. [2022-11-16 11:39:20,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 11:39:20,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:39:20,419 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:39:20,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-16 11:39:20,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-16 11:39:20,630 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:39:20,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:39:20,631 INFO L85 PathProgramCache]: Analyzing trace with hash -465652719, now seen corresponding path program 31 times [2022-11-16 11:39:20,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:39:20,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560590590] [2022-11-16 11:39:20,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:39:20,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:39:20,655 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:39:20,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487519524] [2022-11-16 11:39:20,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:39:20,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:39:20,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:39:20,657 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:39:20,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-16 11:39:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:39:20,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:39:20,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:39:24,443 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 247 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:24,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:39:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 247 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:27,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:39:27,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560590590] [2022-11-16 11:39:27,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:39:27,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487519524] [2022-11-16 11:39:27,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487519524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:39:27,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:39:27,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 42 [2022-11-16 11:39:27,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920907675] [2022-11-16 11:39:27,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:39:27,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-16 11:39:27,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:39:27,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-16 11:39:27,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 11:39:27,691 INFO L87 Difference]: Start difference. First operand 174 states and 203 transitions. Second operand has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:31,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:39:31,195 INFO L93 Difference]: Finished difference Result 239 states and 284 transitions. [2022-11-16 11:39:31,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 11:39:31,196 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 states have internal predecessors, (112), 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 74 [2022-11-16 11:39:31,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:39:31,197 INFO L225 Difference]: With dead ends: 239 [2022-11-16 11:39:31,197 INFO L226 Difference]: Without dead ends: 138 [2022-11-16 11:39:31,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 92 SyntacticMatches, 14 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=749, Invalid=2331, Unknown=0, NotChecked=0, Total=3080 [2022-11-16 11:39:31,198 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 201 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:39:31,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 42 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-16 11:39:31,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-16 11:39:31,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 111. [2022-11-16 11:39:31,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1636363636363636) internal successors, (128), 110 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:31,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2022-11-16 11:39:31,268 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 74 [2022-11-16 11:39:31,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:39:31,268 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2022-11-16 11:39:31,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:31,268 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2022-11-16 11:39:31,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-16 11:39:31,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:39:31,269 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:39:31,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-16 11:39:31,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-16 11:39:31,470 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:39:31,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:39:31,470 INFO L85 PathProgramCache]: Analyzing trace with hash 407113229, now seen corresponding path program 32 times [2022-11-16 11:39:31,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:39:31,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650062461] [2022-11-16 11:39:31,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:39:31,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:39:31,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:39:31,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298415962] [2022-11-16 11:39:31,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:39:31,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:39:31,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:39:31,501 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:39:31,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-16 11:39:31,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:39:31,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:39:31,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-16 11:39:31,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:39:33,610 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 15 treesize of output 11 [2022-11-16 11:39:34,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:34,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:39:34,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:34,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:39:34,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:34,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:39:35,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:35,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:39:35,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:35,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:39:35,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:35,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:39:36,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:36,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:39:36,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:36,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:39:36,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:36,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:39:37,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:37,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:39:37,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:37,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:39:37,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:37,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:39:38,498 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 15 treesize of output 7 [2022-11-16 11:39:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 86 proven. 323 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:39:38,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:39:39,202 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3108 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_3108) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) is different from false [2022-11-16 11:39:39,725 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3108 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_3108) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 12 |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2022-11-16 11:39:40,190 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3108 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_3108) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 20 |c_ULTIMATE.start_main_~a~0#1.offset|)) 5)) is different from false [2022-11-16 11:39:40,678 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3108 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_3108) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 28 |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2022-11-16 11:39:40,723 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3108 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_3108) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 32 (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2022-11-16 11:39:40,770 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3108 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_3108) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 36 |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2022-11-16 11:39:40,817 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3108 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_3108) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 40 (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2022-11-16 11:39:40,866 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3108 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_3108) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 40 |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2022-11-16 11:39:40,919 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3098 Int) (v_ArrVal_3108 (Array Int Int))) (= 5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_3098)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_3108) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 40 |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2022-11-16 11:39:42,950 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1124| Int)) (or (forall ((v_ArrVal_3098 Int) (v_ArrVal_3108 (Array Int Int))) (= 5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_1124| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_3098)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_3108) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 40 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_1124|)))) is different from false [2022-11-16 11:39:44,996 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1124| Int) (v_ArrVal_3098 Int) (v_ArrVal_3108 (Array Int Int)) (v_ArrVal_3096 Int)) (or (= 5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_3096) (+ (* |v_ULTIMATE.start_main_~i~0#1_1124| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_3098)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_3108) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 40 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_1124|)))) is different from false [2022-11-16 11:39:47,045 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1125| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_1124| Int) (v_ArrVal_3098 Int) (v_ArrVal_3108 (Array Int Int)) (v_ArrVal_3096 Int)) (or (= 5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_1125| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_3096) (+ (* |v_ULTIMATE.start_main_~i~0#1_1124| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_3098)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_3108) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 40 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_1125| 1) |v_ULTIMATE.start_main_~i~0#1_1124|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_1125|)))) is different from false [2022-11-16 11:39:47,217 INFO L321 Elim1Store]: treesize reduction 94, result has 28.2 percent of original size [2022-11-16 11:39:47,217 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 49 [2022-11-16 11:39:47,257 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:39:47,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2022-11-16 11:39:47,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2022-11-16 11:39:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 85 proven. 118 refuted. 0 times theorem prover too weak. 7 trivial. 206 not checked. [2022-11-16 11:39:50,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:39:50,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650062461] [2022-11-16 11:39:50,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:39:50,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298415962] [2022-11-16 11:39:50,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298415962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:39:50,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:39:50,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 58 [2022-11-16 11:39:50,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513406789] [2022-11-16 11:39:50,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:39:50,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-16 11:39:50,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:39:50,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-16 11:39:50,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1921, Unknown=28, NotChecked=1188, Total=3306 [2022-11-16 11:39:50,641 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand has 58 states, 58 states have (on average 2.2758620689655173) internal successors, (132), 58 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:02,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:02,047 INFO L93 Difference]: Finished difference Result 140 states and 165 transitions. [2022-11-16 11:40:02,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 11:40:02,048 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.2758620689655173) internal successors, (132), 58 states have internal predecessors, (132), 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 76 [2022-11-16 11:40:02,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:02,049 INFO L225 Difference]: With dead ends: 140 [2022-11-16 11:40:02,049 INFO L226 Difference]: Without dead ends: 112 [2022-11-16 11:40:02,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 94 SyntacticMatches, 11 SemanticMatches, 69 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=240, Invalid=3202, Unknown=28, NotChecked=1500, Total=4970 [2022-11-16 11:40:02,050 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 77 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 2735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1100 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:02,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 147 Invalid, 2735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1574 Invalid, 0 Unknown, 1100 Unchecked, 7.5s Time] [2022-11-16 11:40:02,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-16 11:40:02,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-11-16 11:40:02,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1454545454545455) internal successors, (126), 110 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:02,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 126 transitions. [2022-11-16 11:40:02,125 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 126 transitions. Word has length 76 [2022-11-16 11:40:02,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:02,125 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 126 transitions. [2022-11-16 11:40:02,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.2758620689655173) internal successors, (132), 58 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:02,125 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 126 transitions. [2022-11-16 11:40:02,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-16 11:40:02,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:02,126 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:02,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:02,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:40:02,326 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:40:02,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:02,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1895356907, now seen corresponding path program 33 times [2022-11-16 11:40:02,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:40:02,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429459979] [2022-11-16 11:40:02,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:02,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:40:02,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:40:02,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135927118] [2022-11-16 11:40:02,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:40:02,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:40:02,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:40:02,355 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:40:02,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-16 11:40:03,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-16 11:40:03,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:40:03,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 11:40:03,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 287 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:07,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 287 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:11,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:40:11,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429459979] [2022-11-16 11:40:11,363 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:40:11,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135927118] [2022-11-16 11:40:11,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135927118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:40:11,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:40:11,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 45 [2022-11-16 11:40:11,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222865465] [2022-11-16 11:40:11,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:40:11,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-16 11:40:11,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:40:11,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-16 11:40:11,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=1501, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 11:40:11,366 INFO L87 Difference]: Start difference. First operand 111 states and 126 transitions. Second operand has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 45 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:14,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:14,834 INFO L93 Difference]: Finished difference Result 227 states and 265 transitions. [2022-11-16 11:40:14,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 11:40:14,835 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 45 states have internal predecessors, (120), 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 79 [2022-11-16 11:40:14,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:14,836 INFO L225 Difference]: With dead ends: 227 [2022-11-16 11:40:14,836 INFO L226 Difference]: Without dead ends: 136 [2022-11-16 11:40:14,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 98 SyntacticMatches, 15 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=855, Invalid=2685, Unknown=0, NotChecked=0, Total=3540 [2022-11-16 11:40:14,836 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 265 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:14,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 39 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 11:40:14,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-16 11:40:14,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 113. [2022-11-16 11:40:14,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.1428571428571428) internal successors, (128), 112 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:14,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 128 transitions. [2022-11-16 11:40:14,912 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 128 transitions. Word has length 79 [2022-11-16 11:40:14,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:14,912 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 128 transitions. [2022-11-16 11:40:14,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 45 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:14,912 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 128 transitions. [2022-11-16 11:40:14,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-16 11:40:14,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:14,913 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:14,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:15,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:40:15,131 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:40:15,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:15,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1731345623, now seen corresponding path program 34 times [2022-11-16 11:40:15,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:40:15,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010506429] [2022-11-16 11:40:15,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:15,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:40:15,163 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:40:15,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046487534] [2022-11-16 11:40:15,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:40:15,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:40:15,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:40:15,165 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:40:15,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-16 11:40:15,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:40:15,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:40:15,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 11:40:15,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:15,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-11-16 11:40:16,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:40:16,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-16 11:40:16,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-16 11:40:16,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:40:17,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:40:17,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:40:17,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:40:17,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:40:17,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:40:17,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:40:18,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:40:18,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:40:18,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:40:18,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:40:18,798 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:40:18,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-11-16 11:40:19,520 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 69 proven. 138 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-16 11:40:19,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:26,265 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1214| Int) (v_ArrVal_3374 (Array Int Int)) (v_ArrVal_3362 Int)) (let ((.cse0 (+ 2 |v_ULTIMATE.start_main_~i~0#1_1214|))) (or (= 5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_3362)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_3374) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_1214| 4)))) (< .cse0 |c_ULTIMATE.start_main_~i~0#1|) (< |c_ULTIMATE.start_main_~i~0#1| .cse0)))) is different from false [2022-11-16 11:40:28,310 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1214| Int) (v_ArrVal_3374 (Array Int Int)) (v_ArrVal_3362 Int)) (let ((.cse0 (+ |v_ULTIMATE.start_main_~i~0#1_1214| 1))) (or (< |c_ULTIMATE.start_main_~i~0#1| .cse0) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_3362)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_3374) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_1214| 4))) 5) (< .cse0 |c_ULTIMATE.start_main_~i~0#1|)))) is different from false [2022-11-16 11:40:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 11 proven. 157 refuted. 12 times theorem prover too weak. 276 trivial. 27 not checked. [2022-11-16 11:40:48,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:40:48,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010506429] [2022-11-16 11:40:48,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:40:48,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046487534] [2022-11-16 11:40:48,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046487534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:40:48,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:40:48,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 23 [2022-11-16 11:40:48,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619067842] [2022-11-16 11:40:48,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:40:48,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 11:40:48,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:40:48,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 11:40:48,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=336, Unknown=18, NotChecked=78, Total=506 [2022-11-16 11:40:48,175 INFO L87 Difference]: Start difference. First operand 113 states and 128 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:58,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:58,051 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2022-11-16 11:40:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:40:58,052 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 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 81 [2022-11-16 11:40:58,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:58,053 INFO L225 Difference]: With dead ends: 119 [2022-11-16 11:40:58,053 INFO L226 Difference]: Without dead ends: 115 [2022-11-16 11:40:58,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 135 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=127, Invalid=563, Unknown=20, NotChecked=102, Total=812 [2022-11-16 11:40:58,054 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:58,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 161 Unchecked, 0.7s Time] [2022-11-16 11:40:58,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-16 11:40:58,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2022-11-16 11:40:58,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 99 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:58,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2022-11-16 11:40:58,158 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 81 [2022-11-16 11:40:58,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:58,158 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2022-11-16 11:40:58,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:58,159 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2022-11-16 11:40:58,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-16 11:40:58,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:58,160 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:58,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:58,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-16 11:40:58,370 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:40:58,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:58,371 INFO L85 PathProgramCache]: Analyzing trace with hash -798184625, now seen corresponding path program 35 times [2022-11-16 11:40:58,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:40:58,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789561208] [2022-11-16 11:40:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:58,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:40:58,401 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:40:58,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417632766] [2022-11-16 11:40:58,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:40:58,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:40:58,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:40:58,403 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:40:58,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-16 11:41:01,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-11-16 11:41:01,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:41:01,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 11:41:01,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 330 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:05,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 330 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:10,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:41:10,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789561208] [2022-11-16 11:41:10,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:41:10,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417632766] [2022-11-16 11:41:10,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417632766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:41:10,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:41:10,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 48 [2022-11-16 11:41:10,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695313622] [2022-11-16 11:41:10,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:10,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-16 11:41:10,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:41:10,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-16 11:41:10,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 11:41:10,206 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 48 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:14,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:14,774 INFO L93 Difference]: Finished difference Result 242 states and 281 transitions. [2022-11-16 11:41:14,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-16 11:41:14,775 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 48 states have internal predecessors, (128), 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 84 [2022-11-16 11:41:14,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:14,775 INFO L225 Difference]: With dead ends: 242 [2022-11-16 11:41:14,775 INFO L226 Difference]: Without dead ends: 145 [2022-11-16 11:41:14,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 104 SyntacticMatches, 16 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=968, Invalid=3064, Unknown=0, NotChecked=0, Total=4032 [2022-11-16 11:41:14,776 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 282 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:14,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 32 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-16 11:41:14,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-16 11:41:14,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 102. [2022-11-16 11:41:14,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.108910891089109) internal successors, (112), 101 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:14,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2022-11-16 11:41:14,867 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 84 [2022-11-16 11:41:14,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:14,868 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2022-11-16 11:41:14,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 48 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:14,868 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2022-11-16 11:41:14,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-16 11:41:14,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:14,869 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:14,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-11-16 11:41:15,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:15,089 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:41:15,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:15,089 INFO L85 PathProgramCache]: Analyzing trace with hash 818642381, now seen corresponding path program 36 times [2022-11-16 11:41:15,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:41:15,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39439441] [2022-11-16 11:41:15,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:15,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:41:15,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:41:15,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357612062] [2022-11-16 11:41:15,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:41:15,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:15,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:41:15,124 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:41:15,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-16 11:41:18,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-11-16 11:41:18,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:41:18,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-16 11:41:18,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:18,943 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 15 treesize of output 11 [2022-11-16 11:41:19,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 28 treesize of output 27 [2022-11-16 11:41:19,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 28 treesize of output 27 [2022-11-16 11:41:19,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 28 treesize of output 27 [2022-11-16 11:41:19,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 28 treesize of output 27 [2022-11-16 11:41:19,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 28 treesize of output 27 [2022-11-16 11:41:20,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:41:20,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:41:20,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:41:20,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:41:20,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:41:20,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:41:20,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:41:20,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:41:20,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:41:20,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:41:21,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:41:21,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:41:21,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:41:21,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:41:21,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:41:21,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:41:21,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:41:21,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 11:41:21,911 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:41:21,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-11-16 11:41:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 114 proven. 260 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-11-16 11:41:23,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:29,479 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1317| Int) (v_ArrVal_3650 Int) (v_ArrVal_3659 (Array Int Int))) (let ((.cse0 (+ 5 |v_ULTIMATE.start_main_~i~0#1_1317|))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_3650)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_3659) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_1317| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 5) (< |c_ULTIMATE.start_main_~i~0#1| .cse0) (< .cse0 |c_ULTIMATE.start_main_~i~0#1|)))) is different from false [2022-11-16 11:41:31,524 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1317| Int) (v_ArrVal_3650 Int) (v_ArrVal_3659 (Array Int Int))) (let ((.cse0 (+ |v_ULTIMATE.start_main_~i~0#1_1317| 4))) (or (= 5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_3650)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_3659) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_1317| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (< |c_ULTIMATE.start_main_~i~0#1| .cse0) (< .cse0 |c_ULTIMATE.start_main_~i~0#1|)))) is different from false [2022-11-16 11:41:33,571 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3647 Int) (|v_ULTIMATE.start_main_~i~0#1_1317| Int) (v_ArrVal_3650 Int) (v_ArrVal_3659 (Array Int Int))) (let ((.cse0 (+ |v_ULTIMATE.start_main_~i~0#1_1317| 4))) (or (< |c_ULTIMATE.start_main_~i~0#1| .cse0) (< .cse0 |c_ULTIMATE.start_main_~i~0#1|) (= 5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_3647) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_3650))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_3659) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_1317| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)))))) is different from false [2022-11-16 11:41:47,866 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3647 Int) (v_ArrVal_3645 Int) (|v_ULTIMATE.start_main_~i~0#1_1317| Int) (v_ArrVal_3650 Int) (v_ArrVal_3659 (Array Int Int))) (let ((.cse0 (+ 3 |v_ULTIMATE.start_main_~i~0#1_1317|))) (or (< .cse0 |c_ULTIMATE.start_main_~i~0#1|) (= 5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_3645) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_3647) (+ .cse1 8 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_3650))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_3659) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_1317| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (< |c_ULTIMATE.start_main_~i~0#1| .cse0)))) is different from false [2022-11-16 11:41:49,918 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3647 Int) (v_ArrVal_3645 Int) (|v_ULTIMATE.start_main_~i~0#1_1317| Int) (v_ArrVal_3650 Int) (v_ArrVal_3659 (Array Int Int))) (let ((.cse0 (+ 2 |v_ULTIMATE.start_main_~i~0#1_1317|))) (or (< |c_ULTIMATE.start_main_~i~0#1| .cse0) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_3645) (+ .cse1 8 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_3647) (+ .cse1 12 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_3650))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_3659) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_1317| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 5) (< .cse0 |c_ULTIMATE.start_main_~i~0#1|)))) is different from false [2022-11-16 11:41:51,970 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3647 Int) (v_ArrVal_3645 Int) (|v_ULTIMATE.start_main_~i~0#1_1317| Int) (v_ArrVal_3643 Int) (v_ArrVal_3650 Int) (v_ArrVal_3659 (Array Int Int))) (let ((.cse0 (+ 2 |v_ULTIMATE.start_main_~i~0#1_1317|))) (or (< |c_ULTIMATE.start_main_~i~0#1| .cse0) (< .cse0 |c_ULTIMATE.start_main_~i~0#1|) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_3643) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_3645) (+ .cse1 8 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_3647) (+ .cse1 12 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_3650))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_3659) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_1317| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 5)))) is different from false [2022-11-16 11:42:04,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:42:04,741 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 1 new quantified variables, introduced 5 case distinctions, treesize of input 58 treesize of output 79 [2022-11-16 11:42:04,784 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-16 11:42:04,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2022-11-16 11:42:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 9 proven. 256 refuted. 28 times theorem prover too weak. 181 trivial. 81 not checked. [2022-11-16 11:42:11,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:11,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39439441] [2022-11-16 11:42:11,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:42:11,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357612062] [2022-11-16 11:42:11,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357612062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:11,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:42:11,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 36 [2022-11-16 11:42:11,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216153297] [2022-11-16 11:42:11,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:11,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 11:42:11,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:11,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 11:42:11,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=753, Unknown=25, NotChecked=366, Total=1260 [2022-11-16 11:42:11,136 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:35,977 WARN L233 SmtUtils]: Spent 6.20s on a formula simplification. DAG size of input: 98 DAG size of output: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:42:46,886 WARN L233 SmtUtils]: Spent 6.23s on a formula simplification. DAG size of input: 110 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:42:48,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:48,461 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2022-11-16 11:42:48,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 11:42:48,462 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 states have internal predecessors, (71), 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 86 [2022-11-16 11:42:48,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:48,463 INFO L225 Difference]: With dead ends: 125 [2022-11-16 11:42:48,463 INFO L226 Difference]: Without dead ends: 121 [2022-11-16 11:42:48,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 132 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 6 IntricatePredicates, 1 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 83.1s TimeCoverageRelationStatistics Valid=275, Invalid=1446, Unknown=25, NotChecked=510, Total=2256 [2022-11-16 11:42:48,464 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 424 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:48,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 59 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 331 Invalid, 0 Unknown, 424 Unchecked, 1.7s Time] [2022-11-16 11:42:48,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-16 11:42:48,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2022-11-16 11:42:48,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.1440677966101696) internal successors, (135), 118 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:48,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 135 transitions. [2022-11-16 11:42:48,548 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 135 transitions. Word has length 86 [2022-11-16 11:42:48,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:48,548 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 135 transitions. [2022-11-16 11:42:48,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:48,548 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 135 transitions. [2022-11-16 11:42:48,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-16 11:42:48,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:48,549 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:48,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:48,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-16 11:42:48,750 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:42:48,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:48,750 INFO L85 PathProgramCache]: Analyzing trace with hash -250109157, now seen corresponding path program 37 times [2022-11-16 11:42:48,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:48,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238960526] [2022-11-16 11:42:48,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:48,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:48,781 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:42:48,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1247201347] [2022-11-16 11:42:48,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:42:48,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:48,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:42:48,783 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:42:48,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-16 11:42:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:49,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 11:42:49,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 376 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:53,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 376 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:58,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:58,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238960526] [2022-11-16 11:42:58,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:42:58,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247201347] [2022-11-16 11:42:58,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247201347] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:58,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:42:58,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 51 [2022-11-16 11:42:58,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356520386] [2022-11-16 11:42:58,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:58,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-16 11:42:58,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:58,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-16 11:42:58,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=1939, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 11:42:58,482 INFO L87 Difference]: Start difference. First operand 119 states and 135 transitions. Second operand has 51 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 51 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:03,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:03,421 INFO L93 Difference]: Finished difference Result 326 states and 391 transitions. [2022-11-16 11:43:03,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 11:43:03,422 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 51 states have internal predecessors, (136), 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 89 [2022-11-16 11:43:03,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:03,423 INFO L225 Difference]: With dead ends: 326 [2022-11-16 11:43:03,423 INFO L226 Difference]: Without dead ends: 190 [2022-11-16 11:43:03,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 110 SyntacticMatches, 17 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1088, Invalid=3468, Unknown=0, NotChecked=0, Total=4556 [2022-11-16 11:43:03,424 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 255 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:03,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 45 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-16 11:43:03,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-11-16 11:43:03,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 121. [2022-11-16 11:43:03,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.1416666666666666) internal successors, (137), 120 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:03,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 137 transitions. [2022-11-16 11:43:03,506 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 137 transitions. Word has length 89 [2022-11-16 11:43:03,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:03,506 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 137 transitions. [2022-11-16 11:43:03,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 51 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:03,506 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 137 transitions. [2022-11-16 11:43:03,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-16 11:43:03,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:03,507 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:43:03,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-16 11:43:03,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-16 11:43:03,708 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:43:03,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:03,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1278127965, now seen corresponding path program 38 times [2022-11-16 11:43:03,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:03,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852068145] [2022-11-16 11:43:03,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:03,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:03,733 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:43:03,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800794346] [2022-11-16 11:43:03,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:43:03,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:43:03,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:43:03,734 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:43:03,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c38dde-1f2b-4c41-b36c-5f82ddc7b9d2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-16 11:43:04,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:43:04,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:43:04,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 11:43:04,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:06,095 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 15 treesize of output 11 [2022-11-16 11:43:06,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:43:06,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:43:06,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:43:06,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:43:07,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:43:07,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:43:07,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:43:07,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:43:08,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:43:08,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:43:08,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:43:08,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:43:08,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:43:08,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:43:09,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:43:09,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:43:09,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:43:09,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18