./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 870f3f117c59e986b23526e49a2d44ed8c8e543941d3d310e77e3939c7927e70 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 02:27:22,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:27:22,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:27:22,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:27:22,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:27:22,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:27:22,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:27:22,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:27:22,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:27:22,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:27:22,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:27:22,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:27:22,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:27:22,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:27:22,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:27:22,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:27:22,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:27:22,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:27:22,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:27:22,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:27:22,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:27:22,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:27:22,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:27:22,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:27:22,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:27:22,945 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:27:22,946 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:27:22,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:27:22,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:27:22,949 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:27:22,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:27:22,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:27:22,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:27:22,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:27:22,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:27:22,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:27:22,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:27:22,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:27:22,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:27:22,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:27:22,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:27:22,965 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 02:27:23,021 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:27:23,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:27:23,023 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:27:23,023 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:27:23,024 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:27:23,025 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:27:23,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:27:23,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:27:23,026 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:27:23,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:27:23,028 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:27:23,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:27:23,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:27:23,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:27:23,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 02:27:23,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:27:23,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 02:27:23,029 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:27:23,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 02:27:23,030 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:27:23,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 02:27:23,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:27:23,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:27:23,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:27:23,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:27:23,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:27:23,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:27:23,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 02:27:23,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 02:27:23,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 02:27:23,033 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:27:23,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 02:27:23,033 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:27:23,034 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:27:23,034 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 870f3f117c59e986b23526e49a2d44ed8c8e543941d3d310e77e3939c7927e70 [2022-11-23 02:27:23,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:27:23,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:27:23,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:27:23,431 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:27:23,431 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:27:23,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c [2022-11-23 02:27:27,440 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:27:27,774 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:27:27,775 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c [2022-11-23 02:27:27,782 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/data/9fbac0003/5ff61e5b96c2436f8babcb8501de1f97/FLAG01b8716c5 [2022-11-23 02:27:27,801 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/data/9fbac0003/5ff61e5b96c2436f8babcb8501de1f97 [2022-11-23 02:27:27,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:27:27,807 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:27:27,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:27:27,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:27:27,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:27:27,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:27:27" (1/1) ... [2022-11-23 02:27:27,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a54c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:27, skipping insertion in model container [2022-11-23 02:27:27,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:27:27" (1/1) ... [2022-11-23 02:27:27,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:27:27,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:27:28,046 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2022-11-23 02:27:28,067 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:27:28,081 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 02:27:28,098 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2022-11-23 02:27:28,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:27:28,122 INFO L208 MainTranslator]: Completed translation [2022-11-23 02:27:28,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28 WrapperNode [2022-11-23 02:27:28,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:27:28,124 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 02:27:28,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 02:27:28,124 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 02:27:28,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (1/1) ... [2022-11-23 02:27:28,139 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (1/1) ... [2022-11-23 02:27:28,161 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 39 [2022-11-23 02:27:28,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 02:27:28,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 02:27:28,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 02:27:28,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 02:27:28,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (1/1) ... [2022-11-23 02:27:28,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (1/1) ... [2022-11-23 02:27:28,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (1/1) ... [2022-11-23 02:27:28,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (1/1) ... [2022-11-23 02:27:28,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (1/1) ... [2022-11-23 02:27:28,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (1/1) ... [2022-11-23 02:27:28,188 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (1/1) ... [2022-11-23 02:27:28,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (1/1) ... [2022-11-23 02:27:28,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 02:27:28,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 02:27:28,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 02:27:28,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 02:27:28,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (1/1) ... [2022-11-23 02:27:28,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:27:28,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:27:28,241 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 02:27:28,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 02:27:28,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 02:27:28,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 02:27:28,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 02:27:28,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 02:27:28,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 02:27:28,306 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 02:27:28,404 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 02:27:28,407 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 02:27:28,661 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 02:27:28,693 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 02:27:28,695 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 02:27:28,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:28 BoogieIcfgContainer [2022-11-23 02:27:28,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 02:27:28,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 02:27:28,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 02:27:28,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 02:27:28,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:27:27" (1/3) ... [2022-11-23 02:27:28,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ea4e83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:27:28, skipping insertion in model container [2022-11-23 02:27:28,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (2/3) ... [2022-11-23 02:27:28,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ea4e83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:27:28, skipping insertion in model container [2022-11-23 02:27:28,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:28" (3/3) ... [2022-11-23 02:27:28,715 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound50.c [2022-11-23 02:27:28,744 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 02:27:28,744 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 02:27:28,841 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:27:28,852 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;@73cf7b85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:27:28,853 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 02:27:28,858 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 02:27:28,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 02:27:28,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:27:28,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:27:28,874 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:27:28,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:27:28,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1819788390, now seen corresponding path program 1 times [2022-11-23 02:27:28,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:27:28,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352741042] [2022-11-23 02:27:28,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:27:28,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:27:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:27:29,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:27:29,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352741042] [2022-11-23 02:27:29,097 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-23 02:27:29,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762560275] [2022-11-23 02:27:29,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:27:29,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:27:29,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:27:29,107 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:27:29,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 02:27:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:27:29,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-23 02:27:29,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:27:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:27:29,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:27:29,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762560275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:27:29,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:27:29,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:27:29,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750763528] [2022-11-23 02:27:29,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:27:29,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 02:27:29,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:27:29,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 02:27:29,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 02:27:29,319 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:27:29,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:27:29,346 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2022-11-23 02:27:29,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 02:27:29,348 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 02:27:29,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:27:29,358 INFO L225 Difference]: With dead ends: 34 [2022-11-23 02:27:29,358 INFO L226 Difference]: Without dead ends: 14 [2022-11-23 02:27:29,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 02:27:29,367 INFO L413 NwaCegarLoop]: 21 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, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 02:27:29,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 02:27:29,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-23 02:27:29,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-23 02:27:29,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 02:27:29,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-11-23 02:27:29,417 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 7 [2022-11-23 02:27:29,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:27:29,418 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-11-23 02:27:29,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:27:29,419 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-11-23 02:27:29,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 02:27:29,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:27:29,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:27:29,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 02:27:29,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-23 02:27:29,630 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:27:29,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:27:29,631 INFO L85 PathProgramCache]: Analyzing trace with hash 178441499, now seen corresponding path program 1 times [2022-11-23 02:27:29,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:27:29,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851072192] [2022-11-23 02:27:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:27:29,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:27:29,669 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:27:29,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807978855] [2022-11-23 02:27:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:27:29,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:27:29,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:27:29,673 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:27:29,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 02:27:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:27:29,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 02:27:29,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:27:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:27:29,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:27:29,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:27:29,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851072192] [2022-11-23 02:27:29,903 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:27:29,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807978855] [2022-11-23 02:27:29,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807978855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:27:29,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:27:29,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:27:29,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159217566] [2022-11-23 02:27:29,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:27:29,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:27:29,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:27:29,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:27:29,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:27:29,914 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:27:29,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:27:29,948 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-11-23 02:27:29,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:27:29,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 02:27:29,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:27:29,950 INFO L225 Difference]: With dead ends: 24 [2022-11-23 02:27:29,951 INFO L226 Difference]: Without dead ends: 16 [2022-11-23 02:27:29,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:27:29,953 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 02:27:29,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 02:27:29,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-23 02:27:29,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-23 02:27:29,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 02:27:29,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-23 02:27:29,962 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2022-11-23 02:27:29,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:27:29,963 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-23 02:27:29,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:27:29,964 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-23 02:27:29,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 02:27:29,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:27:29,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:27:29,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 02:27:30,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:27:30,172 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:27:30,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:27:30,173 INFO L85 PathProgramCache]: Analyzing trace with hash 180228959, now seen corresponding path program 1 times [2022-11-23 02:27:30,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:27:30,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037350011] [2022-11-23 02:27:30,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:27:30,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:27:30,193 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:27:30,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670970513] [2022-11-23 02:27:30,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:27:30,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:27:30,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:27:30,208 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:27:30,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 02:27:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:27:30,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 02:27:30,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:27:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:27:30,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:27:30,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:27:30,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037350011] [2022-11-23 02:27:30,398 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:27:30,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670970513] [2022-11-23 02:27:30,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670970513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:27:30,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:27:30,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 02:27:30,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876274872] [2022-11-23 02:27:30,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:27:30,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 02:27:30,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:27:30,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 02:27:30,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:27:30,403 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:27:30,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:27:30,487 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-11-23 02:27:30,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:27:30,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 02:27:30,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:27:30,491 INFO L225 Difference]: With dead ends: 26 [2022-11-23 02:27:30,491 INFO L226 Difference]: Without dead ends: 22 [2022-11-23 02:27:30,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 02:27:30,495 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:27:30,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 48 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 02:27:30,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-23 02:27:30,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-23 02:27:30,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 02:27:30,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-11-23 02:27:30,518 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 8 [2022-11-23 02:27:30,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:27:30,519 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-11-23 02:27:30,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:27:30,519 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-11-23 02:27:30,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 02:27:30,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:27:30,520 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:27:30,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 02:27:30,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:27:30,729 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:27:30,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:27:30,729 INFO L85 PathProgramCache]: Analyzing trace with hash 823572993, now seen corresponding path program 1 times [2022-11-23 02:27:30,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:27:30,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589823957] [2022-11-23 02:27:30,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:27:30,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:27:30,746 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:27:30,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538108167] [2022-11-23 02:27:30,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:27:30,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:27:30,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:27:30,749 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:27:30,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 02:27:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:27:30,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 02:27:30,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:27:30,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:27:30,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:27:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:27:31,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:27:31,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589823957] [2022-11-23 02:27:31,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:27:31,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538108167] [2022-11-23 02:27:31,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538108167] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:27:31,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:27:31,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-23 02:27:31,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062670410] [2022-11-23 02:27:31,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:27:31,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 02:27:31,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:27:31,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 02:27:31,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-23 02:27:31,048 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 02:27:31,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:27:31,234 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-11-23 02:27:31,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 02:27:31,235 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-11-23 02:27:31,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:27:31,239 INFO L225 Difference]: With dead ends: 56 [2022-11-23 02:27:31,240 INFO L226 Difference]: Without dead ends: 48 [2022-11-23 02:27:31,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-23 02:27:31,252 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:27:31,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 90 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 02:27:31,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-23 02:27:31,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2022-11-23 02:27:31,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 32 states have internal predecessors, (36), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 02:27:31,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2022-11-23 02:27:31,285 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 16 [2022-11-23 02:27:31,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:27:31,285 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2022-11-23 02:27:31,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 02:27:31,292 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2022-11-23 02:27:31,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 02:27:31,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:27:31,294 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:27:31,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 02:27:31,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:27:31,500 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:27:31,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:27:31,501 INFO L85 PathProgramCache]: Analyzing trace with hash 825360453, now seen corresponding path program 1 times [2022-11-23 02:27:31,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:27:31,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24210576] [2022-11-23 02:27:31,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:27:31,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:27:31,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:27:31,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154790945] [2022-11-23 02:27:31,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:27:31,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:27:31,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:27:31,540 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:27:31,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 02:27:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:27:31,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 02:27:31,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:27:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:27:31,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:27:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:27:32,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:27:32,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24210576] [2022-11-23 02:27:32,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:27:32,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154790945] [2022-11-23 02:27:32,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154790945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:27:32,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:27:32,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2022-11-23 02:27:32,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640295394] [2022-11-23 02:27:32,362 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:27:32,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 02:27:32,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:27:32,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 02:27:32,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-23 02:27:32,364 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 02:27:32,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:27:32,607 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2022-11-23 02:27:32,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 02:27:32,608 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-11-23 02:27:32,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:27:32,609 INFO L225 Difference]: With dead ends: 58 [2022-11-23 02:27:32,609 INFO L226 Difference]: Without dead ends: 47 [2022-11-23 02:27:32,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-23 02:27:32,611 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 02:27:32,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 69 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 02:27:32,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-23 02:27:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2022-11-23 02:27:32,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 02:27:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-11-23 02:27:32,627 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 16 [2022-11-23 02:27:32,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:27:32,628 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-11-23 02:27:32,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 02:27:32,628 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-11-23 02:27:32,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 02:27:32,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:27:32,629 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:27:32,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 02:27:32,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:27:32,830 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:27:32,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:27:32,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1696898494, now seen corresponding path program 1 times [2022-11-23 02:27:32,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:27:32,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735503272] [2022-11-23 02:27:32,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:27:32,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:27:32,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:27:32,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344247273] [2022-11-23 02:27:32,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:27:32,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:27:32,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:27:32,858 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:27:32,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 02:27:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:27:32,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 02:27:32,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:27:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:27:33,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:28:11,801 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|)) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|)) 4) 0)))) is different from true [2022-11-23 02:28:29,898 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|)) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-23 02:28:38,010 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 02:28:40,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:28:40,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735503272] [2022-11-23 02:28:40,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:28:40,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344247273] [2022-11-23 02:28:40,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344247273] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:28:40,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:28:40,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-11-23 02:28:40,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89770251] [2022-11-23 02:28:40,080 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:28:40,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 02:28:40,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:28:40,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 02:28:40,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=119, Unknown=7, NotChecked=72, Total=240 [2022-11-23 02:28:40,081 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 02:28:40,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:28:40,278 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2022-11-23 02:28:40,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 02:28:40,279 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-11-23 02:28:40,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:28:40,280 INFO L225 Difference]: With dead ends: 46 [2022-11-23 02:28:40,281 INFO L226 Difference]: Without dead ends: 41 [2022-11-23 02:28:40,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=62, Invalid=183, Unknown=7, NotChecked=90, Total=342 [2022-11-23 02:28:40,282 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:28:40,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 69 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 02:28:40,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-23 02:28:40,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-23 02:28:40,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 02:28:40,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-11-23 02:28:40,294 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 22 [2022-11-23 02:28:40,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:28:40,294 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-11-23 02:28:40,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 02:28:40,295 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-11-23 02:28:40,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 02:28:40,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:28:40,296 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 02:28:40,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 02:28:40,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 02:28:40,504 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:28:40,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:28:40,505 INFO L85 PathProgramCache]: Analyzing trace with hash -47987544, now seen corresponding path program 2 times [2022-11-23 02:28:40,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:28:40,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265984071] [2022-11-23 02:28:40,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:28:40,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:28:40,532 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:28:40,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049483851] [2022-11-23 02:28:40,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:28:40,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:28:40,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:28:40,534 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:28:40,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 02:28:40,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:28:40,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:28:40,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 02:28:40,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:28:40,869 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 02:28:40,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:28:45,186 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 02:28:45,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:28:45,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265984071] [2022-11-23 02:28:45,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:28:45,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049483851] [2022-11-23 02:28:45,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049483851] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:28:45,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:28:45,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-11-23 02:28:45,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423388364] [2022-11-23 02:28:45,191 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:28:45,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 02:28:45,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:28:45,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 02:28:45,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2022-11-23 02:28:45,192 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 02:28:45,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:28:45,344 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-11-23 02:28:45,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 02:28:45,344 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2022-11-23 02:28:45,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:28:45,345 INFO L225 Difference]: With dead ends: 46 [2022-11-23 02:28:45,345 INFO L226 Difference]: Without dead ends: 41 [2022-11-23 02:28:45,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=56, Invalid=219, Unknown=1, NotChecked=30, Total=306 [2022-11-23 02:28:45,347 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:28:45,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 85 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 02:28:45,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-23 02:28:45,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-23 02:28:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 02:28:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-11-23 02:28:45,358 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 30 [2022-11-23 02:28:45,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:28:45,358 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-11-23 02:28:45,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 02:28:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-11-23 02:28:45,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-23 02:28:45,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:28:45,360 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2022-11-23 02:28:45,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 02:28:45,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:28:45,567 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:28:45,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:28:45,567 INFO L85 PathProgramCache]: Analyzing trace with hash -584163058, now seen corresponding path program 3 times [2022-11-23 02:28:45,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:28:45,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999696409] [2022-11-23 02:28:45,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:28:45,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:28:45,579 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:28:45,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253793248] [2022-11-23 02:28:45,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:28:45,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:28:45,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:28:45,582 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:28:45,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 02:28:45,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 02:28:45,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:28:45,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-23 02:28:45,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:28:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 02:28:46,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:28:50,423 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (let ((.cse1 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (<= (div (+ (- (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (* (- 13) .cse0) (* (- 6) .cse1)) (- 4)) (+ |c_ULTIMATE.start_main_~x~0#1| (* .cse0 3) .cse1)))) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0)))) is different from false [2022-11-23 02:28:54,540 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 02:28:54,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:28:54,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999696409] [2022-11-23 02:28:54,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:28:54,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253793248] [2022-11-23 02:28:54,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253793248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:28:54,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:28:54,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-11-23 02:28:54,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086380271] [2022-11-23 02:28:54,545 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:28:54,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 02:28:54,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:28:54,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 02:28:54,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=255, Unknown=2, NotChecked=66, Total=380 [2022-11-23 02:28:54,547 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 02:28:54,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:28:54,856 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-11-23 02:28:54,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 02:28:54,857 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2022-11-23 02:28:54,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:28:54,858 INFO L225 Difference]: With dead ends: 48 [2022-11-23 02:28:54,858 INFO L226 Difference]: Without dead ends: 43 [2022-11-23 02:28:54,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=80, Invalid=346, Unknown=2, NotChecked=78, Total=506 [2022-11-23 02:28:54,859 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 02:28:54,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 138 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 02:28:54,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-23 02:28:54,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-23 02:28:54,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 02:28:54,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-11-23 02:28:54,870 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2022-11-23 02:28:54,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:28:54,871 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-11-23 02:28:54,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 02:28:54,871 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-11-23 02:28:54,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-23 02:28:54,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:28:54,872 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-23 02:28:54,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 02:28:55,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:28:55,079 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:28:55,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:28:55,079 INFO L85 PathProgramCache]: Analyzing trace with hash 2045303987, now seen corresponding path program 2 times [2022-11-23 02:28:55,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:28:55,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786864859] [2022-11-23 02:28:55,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:28:55,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:28:55,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:28:55,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398681533] [2022-11-23 02:28:55,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:28:55,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:28:55,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:28:55,100 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:28:55,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 02:28:55,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:28:55,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:28:55,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 02:28:55,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:28:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:28:55,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:28:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 02:28:55,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:28:55,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786864859] [2022-11-23 02:28:55,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:28:55,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398681533] [2022-11-23 02:28:55,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398681533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:28:55,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:28:55,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-23 02:28:55,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235599474] [2022-11-23 02:28:55,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:28:55,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 02:28:55,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:28:55,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 02:28:55,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-23 02:28:55,493 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 02:28:55,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:28:55,843 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2022-11-23 02:28:55,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 02:28:55,844 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 40 [2022-11-23 02:28:55,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:28:55,847 INFO L225 Difference]: With dead ends: 119 [2022-11-23 02:28:55,851 INFO L226 Difference]: Without dead ends: 114 [2022-11-23 02:28:55,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-11-23 02:28:55,852 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 91 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 02:28:55,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 129 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 02:28:55,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-23 02:28:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 89. [2022-11-23 02:28:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 02:28:55,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2022-11-23 02:28:55,885 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 40 [2022-11-23 02:28:55,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:28:55,886 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2022-11-23 02:28:55,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 02:28:55,887 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2022-11-23 02:28:55,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 02:28:55,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:28:55,899 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2022-11-23 02:28:55,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 02:28:56,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:28:56,100 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:28:56,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:28:56,101 INFO L85 PathProgramCache]: Analyzing trace with hash -635357324, now seen corresponding path program 4 times [2022-11-23 02:28:56,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:28:56,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245956660] [2022-11-23 02:28:56,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:28:56,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:28:56,112 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:28:56,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751175851] [2022-11-23 02:28:56,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:28:56,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:28:56,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:28:56,119 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:28:56,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 02:28:56,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:28:56,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:28:56,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 02:28:56,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:28:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 18 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 02:28:56,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:29:37,018 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_16| Int)) (or (= (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_16| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_16|)) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 2) 1)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 3)) 4) 0)))) is different from true [2022-11-23 02:29:55,097 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_16| Int)) (or (= (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_16| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_16|)) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 2) 1)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-23 02:30:03,177 WARN L837 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 2) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 2 |c_ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 4) 4)) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 02:30:29,509 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 4) |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 3)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 16 (* |c_ULTIMATE.start_main_~y~0#1| 8)) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|))))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 02:30:31,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:30:31,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245956660] [2022-11-23 02:30:31,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:30:31,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751175851] [2022-11-23 02:30:31,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751175851] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:30:31,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:30:31,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-11-23 02:30:31,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369254907] [2022-11-23 02:30:31,545 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:30:31,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 02:30:31,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:30:31,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 02:30:31,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=249, Unknown=10, NotChecked=140, Total=462 [2022-11-23 02:30:31,547 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 02:30:31,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:30:31,900 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2022-11-23 02:30:31,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 02:30:31,901 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 46 [2022-11-23 02:30:31,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:30:31,903 INFO L225 Difference]: With dead ends: 94 [2022-11-23 02:30:31,903 INFO L226 Difference]: Without dead ends: 89 [2022-11-23 02:30:31,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 38.5s TimeCoverageRelationStatistics Valid=82, Invalid=344, Unknown=10, NotChecked=164, Total=600 [2022-11-23 02:30:31,905 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 02:30:31,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 159 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 02:30:31,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-23 02:30:31,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-23 02:30:31,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 67 states have internal predecessors, (73), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 02:30:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2022-11-23 02:30:31,925 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 46 [2022-11-23 02:30:31,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:30:31,926 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2022-11-23 02:30:31,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 02:30:31,926 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2022-11-23 02:30:31,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 02:30:31,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:30:31,927 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2022-11-23 02:30:31,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 02:30:32,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:30:32,136 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:30:32,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:30:32,137 INFO L85 PathProgramCache]: Analyzing trace with hash 220350426, now seen corresponding path program 5 times [2022-11-23 02:30:32,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:30:32,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221130683] [2022-11-23 02:30:32,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:30:32,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:30:32,174 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:30:32,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282076766] [2022-11-23 02:30:32,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:30:32,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:30:32,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:30:32,187 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:30:32,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 02:30:32,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-23 02:30:32,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:30:32,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-23 02:30:32,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:30:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 70 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 02:30:32,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:30:32,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:30:32,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221130683] [2022-11-23 02:30:32,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:30:32,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282076766] [2022-11-23 02:30:32,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282076766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:30:32,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:30:32,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-11-23 02:30:32,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705210588] [2022-11-23 02:30:32,977 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:30:32,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 02:30:32,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:30:32,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 02:30:32,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-23 02:30:32,979 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 02:30:33,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:30:33,369 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2022-11-23 02:30:33,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 02:30:33,370 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 54 [2022-11-23 02:30:33,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:30:33,371 INFO L225 Difference]: With dead ends: 94 [2022-11-23 02:30:33,372 INFO L226 Difference]: Without dead ends: 89 [2022-11-23 02:30:33,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-11-23 02:30:33,373 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 02:30:33,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 197 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 02:30:33,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-23 02:30:33,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-23 02:30:33,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 02:30:33,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2022-11-23 02:30:33,409 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 54 [2022-11-23 02:30:33,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:30:33,409 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2022-11-23 02:30:33,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 02:30:33,410 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2022-11-23 02:30:33,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-23 02:30:33,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:30:33,413 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2022-11-23 02:30:33,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 02:30:33,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 02:30:33,619 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:30:33,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:30:33,620 INFO L85 PathProgramCache]: Analyzing trace with hash 156734016, now seen corresponding path program 6 times [2022-11-23 02:30:33,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:30:33,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844751458] [2022-11-23 02:30:33,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:30:33,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:30:33,636 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:30:33,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360926743] [2022-11-23 02:30:33,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 02:30:33,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:30:33,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:30:33,638 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:30:33,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 02:30:34,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-23 02:30:34,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:30:34,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 02:30:34,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:30:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 16 proven. 100 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-23 02:30:34,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:30:34,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:30:34,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844751458] [2022-11-23 02:30:34,898 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:30:34,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360926743] [2022-11-23 02:30:34,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360926743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:30:34,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:30:34,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-11-23 02:30:34,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733864391] [2022-11-23 02:30:34,899 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:30:34,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 02:30:34,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:30:34,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 02:30:34,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-23 02:30:34,902 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 02:30:35,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:30:35,383 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2022-11-23 02:30:35,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 02:30:35,384 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 62 [2022-11-23 02:30:35,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:30:35,385 INFO L225 Difference]: With dead ends: 94 [2022-11-23 02:30:35,385 INFO L226 Difference]: Without dead ends: 89 [2022-11-23 02:30:35,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-11-23 02:30:35,386 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 02:30:35,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 221 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 02:30:35,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-23 02:30:35,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-23 02:30:35,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 02:30:35,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2022-11-23 02:30:35,404 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 62 [2022-11-23 02:30:35,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:30:35,405 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2022-11-23 02:30:35,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 02:30:35,405 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2022-11-23 02:30:35,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-23 02:30:35,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:30:35,407 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1] [2022-11-23 02:30:35,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 02:30:35,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 02:30:35,615 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:30:35,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:30:35,616 INFO L85 PathProgramCache]: Analyzing trace with hash -605612378, now seen corresponding path program 7 times [2022-11-23 02:30:35,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:30:35,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026576177] [2022-11-23 02:30:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:30:35,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:30:35,627 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:30:35,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328679687] [2022-11-23 02:30:35,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 02:30:35,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:30:35,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:30:35,630 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:30:35,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 02:30:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:30:35,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-23 02:30:35,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:30:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 36 proven. 113 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-23 02:30:36,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:30:40,391 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 02:31:00,472 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_33| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| 2)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_33|))))) is different from true [2022-11-23 02:31:18,540 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_33| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| 2)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_33|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-23 02:31:26,597 WARN L837 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) |c_ULTIMATE.start_main_~k~0#1|)) (not (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 02:32:06,851 WARN L837 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 3) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 2) |c_ULTIMATE.start_main_~k~0#1|)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 6) 9) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 3 |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 02:32:16,959 WARN L837 $PredicateComparison]: unable to prove that (or (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 3) |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 4) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 16 (* |c_ULTIMATE.start_main_~y~0#1| 8)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 4 |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 02:32:27,058 WARN L837 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 5) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 4) |c_ULTIMATE.start_main_~k~0#1|)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 25) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 5 |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 02:32:59,140 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 6)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 7) |ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 49 (* |c_ULTIMATE.start_main_~y~0#1| 14)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|) (* 7 |ULTIMATE.start_main_~k~0#1|))))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 02:33:01,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:33:01,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026576177] [2022-11-23 02:33:01,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:33:01,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328679687] [2022-11-23 02:33:01,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328679687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:33:01,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:33:01,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-11-23 02:33:01,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476146227] [2022-11-23 02:33:01,167 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:33:01,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 02:33:01,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:33:01,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 02:33:01,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=318, Unknown=16, NotChecked=344, Total=756 [2022-11-23 02:33:01,169 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 02:33:01,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:33:01,557 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2022-11-23 02:33:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 02:33:01,558 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 70 [2022-11-23 02:33:01,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:33:01,559 INFO L225 Difference]: With dead ends: 94 [2022-11-23 02:33:01,559 INFO L226 Difference]: Without dead ends: 89 [2022-11-23 02:33:01,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 52.1s TimeCoverageRelationStatistics Valid=99, Invalid=423, Unknown=16, NotChecked=392, Total=930 [2022-11-23 02:33:01,560 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 02:33:01,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 285 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 02:33:01,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-23 02:33:01,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-23 02:33:01,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 02:33:01,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2022-11-23 02:33:01,581 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 70 [2022-11-23 02:33:01,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:33:01,582 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2022-11-23 02:33:01,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 02:33:01,583 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2022-11-23 02:33:01,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-23 02:33:01,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:01,584 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1] [2022-11-23 02:33:01,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 02:33:01,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 02:33:01,787 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:33:01,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:01,788 INFO L85 PathProgramCache]: Analyzing trace with hash 200725772, now seen corresponding path program 8 times [2022-11-23 02:33:01,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:33:01,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418534754] [2022-11-23 02:33:01,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:01,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:33:01,797 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:33:01,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344278584] [2022-11-23 02:33:01,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:33:01,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:33:01,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:33:01,799 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:33:01,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 02:33:01,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:33:01,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:33:01,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-23 02:33:01,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 38 proven. 148 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-23 02:33:02,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:33:06,489 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 02:33:06,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:33:06,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418534754] [2022-11-23 02:33:06,491 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:33:06,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344278584] [2022-11-23 02:33:06,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344278584] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:33:06,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:33:06,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-11-23 02:33:06,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190349047] [2022-11-23 02:33:06,492 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:33:06,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 02:33:06,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:33:06,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 02:33:06,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=328, Unknown=1, NotChecked=36, Total=420 [2022-11-23 02:33:06,493 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 02:33:06,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:33:06,883 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2022-11-23 02:33:06,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 02:33:06,884 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 78 [2022-11-23 02:33:06,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:33:06,885 INFO L225 Difference]: With dead ends: 94 [2022-11-23 02:33:06,885 INFO L226 Difference]: Without dead ends: 89 [2022-11-23 02:33:06,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=74, Invalid=435, Unknown=1, NotChecked=42, Total=552 [2022-11-23 02:33:06,886 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 02:33:06,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 335 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 02:33:06,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-23 02:33:06,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-23 02:33:06,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 02:33:06,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-11-23 02:33:06,898 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 78 [2022-11-23 02:33:06,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:33:06,899 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-11-23 02:33:06,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 02:33:06,899 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-11-23 02:33:06,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-23 02:33:06,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:06,900 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1] [2022-11-23 02:33:06,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 02:33:07,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 02:33:07,106 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:33:07,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:07,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1699951246, now seen corresponding path program 9 times [2022-11-23 02:33:07,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:33:07,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180227391] [2022-11-23 02:33:07,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:07,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:33:07,117 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:33:07,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791307800] [2022-11-23 02:33:07,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:33:07,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:33:07,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:33:07,119 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:33:07,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 02:33:07,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-23 02:33:07,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:33:07,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-23 02:33:07,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:07,756 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 28 proven. 199 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-23 02:33:07,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:33:08,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:33:08,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180227391] [2022-11-23 02:33:08,112 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:33:08,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791307800] [2022-11-23 02:33:08,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791307800] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:33:08,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:33:08,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-11-23 02:33:08,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584432996] [2022-11-23 02:33:08,113 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:33:08,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 02:33:08,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:33:08,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 02:33:08,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-11-23 02:33:08,115 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 02:33:08,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:33:08,610 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2022-11-23 02:33:08,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 02:33:08,611 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 86 [2022-11-23 02:33:08,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:33:08,611 INFO L225 Difference]: With dead ends: 96 [2022-11-23 02:33:08,611 INFO L226 Difference]: Without dead ends: 91 [2022-11-23 02:33:08,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-11-23 02:33:08,612 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 02:33:08,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 365 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 02:33:08,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-23 02:33:08,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-11-23 02:33:08,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-23 02:33:08,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2022-11-23 02:33:08,624 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2022-11-23 02:33:08,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:33:08,625 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2022-11-23 02:33:08,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 02:33:08,625 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2022-11-23 02:33:08,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-23 02:33:08,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:08,627 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-11-23 02:33:08,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 02:33:08,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 02:33:08,831 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:33:08,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:08,832 INFO L85 PathProgramCache]: Analyzing trace with hash -780287977, now seen corresponding path program 3 times [2022-11-23 02:33:08,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:33:08,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516438199] [2022-11-23 02:33:08,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:08,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:33:08,865 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:33:08,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465732051] [2022-11-23 02:33:08,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:33:08,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:33:08,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:33:08,869 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:33:08,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 02:33:09,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-23 02:33:09,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:33:09,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 02:33:09,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:33:09,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:33:09,661 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-23 02:33:09,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:33:09,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516438199] [2022-11-23 02:33:09,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:33:09,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465732051] [2022-11-23 02:33:09,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465732051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:33:09,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:33:09,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-11-23 02:33:09,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060737952] [2022-11-23 02:33:09,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:33:09,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 02:33:09,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:33:09,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 02:33:09,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-11-23 02:33:09,663 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-23 02:33:10,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:33:10,247 INFO L93 Difference]: Finished difference Result 245 states and 257 transitions. [2022-11-23 02:33:10,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-23 02:33:10,247 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2022-11-23 02:33:10,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:33:10,249 INFO L225 Difference]: With dead ends: 245 [2022-11-23 02:33:10,249 INFO L226 Difference]: Without dead ends: 240 [2022-11-23 02:33:10,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-11-23 02:33:10,251 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 226 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 02:33:10,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 214 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 02:33:10,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-23 02:33:10,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 185. [2022-11-23 02:33:10,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0935251798561152) internal successors, (152), 139 states have internal predecessors, (152), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-23 02:33:10,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 197 transitions. [2022-11-23 02:33:10,272 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 197 transitions. Word has length 88 [2022-11-23 02:33:10,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:33:10,273 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 197 transitions. [2022-11-23 02:33:10,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-23 02:33:10,273 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 197 transitions. [2022-11-23 02:33:10,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-23 02:33:10,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:10,274 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1] [2022-11-23 02:33:10,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 02:33:10,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:33:10,481 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:33:10,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:10,481 INFO L85 PathProgramCache]: Analyzing trace with hash 53411800, now seen corresponding path program 10 times [2022-11-23 02:33:10,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:33:10,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341367839] [2022-11-23 02:33:10,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:10,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:33:10,489 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:33:10,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592474353] [2022-11-23 02:33:10,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:33:10,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:33:10,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:33:10,491 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:33:10,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 02:33:11,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:33:11,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:33:11,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-23 02:33:11,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 24 proven. 248 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-23 02:33:11,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:33:11,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:33:11,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341367839] [2022-11-23 02:33:11,877 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:33:11,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592474353] [2022-11-23 02:33:11,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592474353] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:33:11,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:33:11,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-11-23 02:33:11,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808109729] [2022-11-23 02:33:11,877 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:33:11,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 02:33:11,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:33:11,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 02:33:11,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-11-23 02:33:11,879 INFO L87 Difference]: Start difference. First operand 185 states and 197 transitions. Second operand has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-23 02:33:12,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:33:12,410 INFO L93 Difference]: Finished difference Result 190 states and 201 transitions. [2022-11-23 02:33:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 02:33:12,411 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 94 [2022-11-23 02:33:12,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:33:12,413 INFO L225 Difference]: With dead ends: 190 [2022-11-23 02:33:12,413 INFO L226 Difference]: Without dead ends: 185 [2022-11-23 02:33:12,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-11-23 02:33:12,415 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 02:33:12,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 421 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 02:33:12,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-23 02:33:12,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-11-23 02:33:12,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0863309352517985) internal successors, (151), 139 states have internal predecessors, (151), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-23 02:33:12,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 196 transitions. [2022-11-23 02:33:12,440 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 196 transitions. Word has length 94 [2022-11-23 02:33:12,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:33:12,440 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 196 transitions. [2022-11-23 02:33:12,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-23 02:33:12,441 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 196 transitions. [2022-11-23 02:33:12,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-23 02:33:12,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:12,442 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1] [2022-11-23 02:33:12,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 02:33:12,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 02:33:12,652 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:33:12,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:12,652 INFO L85 PathProgramCache]: Analyzing trace with hash 983788606, now seen corresponding path program 11 times [2022-11-23 02:33:12,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:33:12,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175957717] [2022-11-23 02:33:12,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:12,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:33:12,675 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:33:12,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1334356488] [2022-11-23 02:33:12,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:33:12,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:33:12,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:33:12,677 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:33:12,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 02:33:12,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-23 02:33:12,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:33:12,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-23 02:33:12,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 50 proven. 271 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-23 02:33:13,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:33:13,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:33:13,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175957717] [2022-11-23 02:33:13,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:33:13,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334356488] [2022-11-23 02:33:13,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334356488] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:33:13,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:33:13,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-11-23 02:33:13,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773415821] [2022-11-23 02:33:13,626 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:33:13,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 02:33:13,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:33:13,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 02:33:13,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-11-23 02:33:13,627 INFO L87 Difference]: Start difference. First operand 185 states and 196 transitions. Second operand has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-23 02:33:14,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:33:14,253 INFO L93 Difference]: Finished difference Result 190 states and 200 transitions. [2022-11-23 02:33:14,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 02:33:14,254 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 102 [2022-11-23 02:33:14,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:33:14,255 INFO L225 Difference]: With dead ends: 190 [2022-11-23 02:33:14,256 INFO L226 Difference]: Without dead ends: 185 [2022-11-23 02:33:14,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-11-23 02:33:14,257 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 02:33:14,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 509 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 02:33:14,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-23 02:33:14,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-11-23 02:33:14,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.079136690647482) internal successors, (150), 139 states have internal predecessors, (150), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-23 02:33:14,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 195 transitions. [2022-11-23 02:33:14,274 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 195 transitions. Word has length 102 [2022-11-23 02:33:14,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:33:14,275 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 195 transitions. [2022-11-23 02:33:14,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-23 02:33:14,275 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 195 transitions. [2022-11-23 02:33:14,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-23 02:33:14,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:14,276 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1] [2022-11-23 02:33:14,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-23 02:33:14,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 02:33:14,483 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:33:14,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:14,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1339026780, now seen corresponding path program 12 times [2022-11-23 02:33:14,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:33:14,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229832065] [2022-11-23 02:33:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:14,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:33:14,493 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:33:14,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607022472] [2022-11-23 02:33:14,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 02:33:14,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:33:14,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:33:14,495 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:33:14,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 02:33:14,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-11-23 02:33:14,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:33:14,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-23 02:33:14,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 107 proven. 321 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-11-23 02:33:15,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:33:19,576 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (let ((.cse1 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (<= (+ |c_ULTIMATE.start_main_~x~0#1| (* .cse0 3) .cse1) (div (+ (- (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (* (- 13) .cse0) (* (- 6) .cse1)) (- 4))))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0)))) is different from false [2022-11-23 02:33:23,634 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 02:33:23,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:33:23,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229832065] [2022-11-23 02:33:23,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:33:23,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607022472] [2022-11-23 02:33:23,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607022472] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:33:23,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:33:23,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-11-23 02:33:23,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912079300] [2022-11-23 02:33:23,638 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:33:23,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 02:33:23,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:33:23,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 02:33:23,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=633, Unknown=2, NotChecked=102, Total=812 [2022-11-23 02:33:23,639 INFO L87 Difference]: Start difference. First operand 185 states and 195 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 19 states have internal predecessors, (50), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 02:33:24,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:33:24,346 INFO L93 Difference]: Finished difference Result 190 states and 199 transitions. [2022-11-23 02:33:24,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 02:33:24,347 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 19 states have internal predecessors, (50), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 110 [2022-11-23 02:33:24,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:33:24,348 INFO L225 Difference]: With dead ends: 190 [2022-11-23 02:33:24,348 INFO L226 Difference]: Without dead ends: 185 [2022-11-23 02:33:24,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=98, Invalid=778, Unknown=2, NotChecked=114, Total=992 [2022-11-23 02:33:24,348 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 02:33:24,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 576 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 02:33:24,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-23 02:33:24,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-11-23 02:33:24,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0719424460431655) internal successors, (149), 139 states have internal predecessors, (149), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-23 02:33:24,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 194 transitions. [2022-11-23 02:33:24,369 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 194 transitions. Word has length 110 [2022-11-23 02:33:24,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:33:24,370 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 194 transitions. [2022-11-23 02:33:24,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 19 states have internal predecessors, (50), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 02:33:24,370 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 194 transitions. [2022-11-23 02:33:24,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-23 02:33:24,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:24,371 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1] [2022-11-23 02:33:24,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 02:33:24,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:33:24,578 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:33:24,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:24,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1291514634, now seen corresponding path program 13 times [2022-11-23 02:33:24,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:33:24,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255510428] [2022-11-23 02:33:24,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:24,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:33:24,588 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:33:24,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966010286] [2022-11-23 02:33:24,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 02:33:24,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:33:24,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:33:24,590 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:33:24,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 02:33:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:24,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-23 02:33:24,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 66 proven. 365 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-11-23 02:33:25,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:33:29,370 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 02:33:49,418 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_57| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| 3)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_57|))))) is different from true [2022-11-23 02:34:07,472 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_57| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| 3)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_57|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-23 02:34:15,515 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 02:34:17,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:34:17,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255510428] [2022-11-23 02:34:17,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:34:17,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966010286] [2022-11-23 02:34:17,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966010286] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:34:17,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:34:17,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-11-23 02:34:17,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84315935] [2022-11-23 02:34:17,541 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:34:17,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 02:34:17,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:34:17,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 02:34:17,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=503, Unknown=4, NotChecked=188, Total=756 [2022-11-23 02:34:17,542 INFO L87 Difference]: Start difference. First operand 185 states and 194 transitions. Second operand has 21 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-23 02:34:18,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:34:18,297 INFO L93 Difference]: Finished difference Result 190 states and 198 transitions. [2022-11-23 02:34:18,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 02:34:18,297 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 118 [2022-11-23 02:34:18,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:34:18,299 INFO L225 Difference]: With dead ends: 190 [2022-11-23 02:34:18,299 INFO L226 Difference]: Without dead ends: 185 [2022-11-23 02:34:18,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=80, Invalid=634, Unknown=4, NotChecked=212, Total=930 [2022-11-23 02:34:18,300 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 7 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 02:34:18,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 613 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 02:34:18,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-23 02:34:18,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-11-23 02:34:18,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.064748201438849) internal successors, (148), 139 states have internal predecessors, (148), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-23 02:34:18,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 193 transitions. [2022-11-23 02:34:18,329 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 193 transitions. Word has length 118 [2022-11-23 02:34:18,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:34:18,330 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 193 transitions. [2022-11-23 02:34:18,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-23 02:34:18,330 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 193 transitions. [2022-11-23 02:34:18,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-23 02:34:18,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:34:18,332 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1] [2022-11-23 02:34:18,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-23 02:34:18,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:34:18,535 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:34:18,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:34:18,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1948913008, now seen corresponding path program 14 times [2022-11-23 02:34:18,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:34:18,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257260446] [2022-11-23 02:34:18,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:34:18,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:34:18,545 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:34:18,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504070006] [2022-11-23 02:34:18,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:34:18,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:34:18,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:34:18,547 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:34:18,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-23 02:34:18,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:34:18,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:34:18,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-23 02:34:18,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:34:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 68 proven. 424 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-11-23 02:34:19,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:34:23,622 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 02:34:23,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:34:23,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257260446] [2022-11-23 02:34:23,624 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:34:23,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504070006] [2022-11-23 02:34:23,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504070006] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:34:23,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:34:23,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-11-23 02:34:23,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587675133] [2022-11-23 02:34:23,625 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:34:23,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 02:34:23,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:34:23,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 02:34:23,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=580, Unknown=1, NotChecked=48, Total=702 [2022-11-23 02:34:23,626 INFO L87 Difference]: Start difference. First operand 185 states and 193 transitions. Second operand has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-23 02:34:24,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:34:24,477 INFO L93 Difference]: Finished difference Result 190 states and 197 transitions. [2022-11-23 02:34:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 02:34:24,477 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 126 [2022-11-23 02:34:24,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:34:24,479 INFO L225 Difference]: With dead ends: 190 [2022-11-23 02:34:24,479 INFO L226 Difference]: Without dead ends: 185 [2022-11-23 02:34:24,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=92, Invalid=723, Unknown=1, NotChecked=54, Total=870 [2022-11-23 02:34:24,480 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 7 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 02:34:24,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 685 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 02:34:24,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-23 02:34:24,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-11-23 02:34:24,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0575539568345325) internal successors, (147), 139 states have internal predecessors, (147), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-23 02:34:24,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 192 transitions. [2022-11-23 02:34:24,498 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 192 transitions. Word has length 126 [2022-11-23 02:34:24,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:34:24,499 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 192 transitions. [2022-11-23 02:34:24,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-23 02:34:24,499 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 192 transitions. [2022-11-23 02:34:24,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-23 02:34:24,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:34:24,501 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1] [2022-11-23 02:34:24,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-23 02:34:24,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-23 02:34:24,706 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:34:24,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:34:24,707 INFO L85 PathProgramCache]: Analyzing trace with hash 48456150, now seen corresponding path program 15 times [2022-11-23 02:34:24,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:34:24,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025574265] [2022-11-23 02:34:24,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:34:24,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:34:24,716 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:34:24,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313052789] [2022-11-23 02:34:24,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:34:24,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:34:24,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:34:24,718 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:34:24,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-23 02:34:25,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-23 02:34:25,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:34:25,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-23 02:34:25,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:34:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 58 proven. 499 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-11-23 02:34:25,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:34:25,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:34:25,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025574265] [2022-11-23 02:34:25,867 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:34:25,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313052789] [2022-11-23 02:34:25,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313052789] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:34:25,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:34:25,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-11-23 02:34:25,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478440989] [2022-11-23 02:34:25,868 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:34:25,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-23 02:34:25,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:34:25,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-23 02:34:25,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-11-23 02:34:25,869 INFO L87 Difference]: Start difference. First operand 185 states and 192 transitions. Second operand has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-23 02:34:26,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:34:26,758 INFO L93 Difference]: Finished difference Result 190 states and 196 transitions. [2022-11-23 02:34:26,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 02:34:26,759 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 134 [2022-11-23 02:34:26,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:34:26,761 INFO L225 Difference]: With dead ends: 190 [2022-11-23 02:34:26,761 INFO L226 Difference]: Without dead ends: 185 [2022-11-23 02:34:26,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-11-23 02:34:26,762 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 6 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 02:34:26,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 797 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 02:34:26,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-23 02:34:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-11-23 02:34:26,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0503597122302157) internal successors, (146), 139 states have internal predecessors, (146), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-23 02:34:26,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 191 transitions. [2022-11-23 02:34:26,797 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 191 transitions. Word has length 134 [2022-11-23 02:34:26,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:34:26,800 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 191 transitions. [2022-11-23 02:34:26,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-23 02:34:26,800 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 191 transitions. [2022-11-23 02:34:26,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-23 02:34:26,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:34:26,802 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1] [2022-11-23 02:34:26,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-23 02:34:27,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-23 02:34:27,009 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:34:27,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:34:27,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1347219516, now seen corresponding path program 16 times [2022-11-23 02:34:27,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:34:27,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329784399] [2022-11-23 02:34:27,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:34:27,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:34:27,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:34:27,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1385566990] [2022-11-23 02:34:27,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:34:27,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:34:27,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:34:27,023 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:34:27,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-23 02:34:27,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:34:27,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:34:27,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-23 02:34:27,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:34:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 39 proven. 587 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-11-23 02:34:28,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:34:28,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:34:28,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329784399] [2022-11-23 02:34:28,557 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:34:28,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385566990] [2022-11-23 02:34:28,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385566990] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:34:28,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:34:28,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-11-23 02:34:28,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568064174] [2022-11-23 02:34:28,557 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:34:28,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 02:34:28,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:34:28,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 02:34:28,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-11-23 02:34:28,559 INFO L87 Difference]: Start difference. First operand 185 states and 191 transitions. Second operand has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-23 02:34:29,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:34:29,535 INFO L93 Difference]: Finished difference Result 190 states and 195 transitions. [2022-11-23 02:34:29,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 02:34:29,535 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 142 [2022-11-23 02:34:29,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:34:29,537 INFO L225 Difference]: With dead ends: 190 [2022-11-23 02:34:29,537 INFO L226 Difference]: Without dead ends: 185 [2022-11-23 02:34:29,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-11-23 02:34:29,538 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 7 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 02:34:29,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 841 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 02:34:29,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-23 02:34:29,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-11-23 02:34:29,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0431654676258992) internal successors, (145), 139 states have internal predecessors, (145), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-23 02:34:29,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 190 transitions. [2022-11-23 02:34:29,559 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 190 transitions. Word has length 142 [2022-11-23 02:34:29,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:34:29,559 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 190 transitions. [2022-11-23 02:34:29,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-23 02:34:29,560 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 190 transitions. [2022-11-23 02:34:29,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-23 02:34:29,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:34:29,562 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1] [2022-11-23 02:34:29,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-23 02:34:29,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:34:29,769 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:34:29,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:34:29,769 INFO L85 PathProgramCache]: Analyzing trace with hash 764197026, now seen corresponding path program 17 times [2022-11-23 02:34:29,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:34:29,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852557516] [2022-11-23 02:34:29,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:34:29,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:34:29,784 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:34:29,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555216012] [2022-11-23 02:34:29,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:34:29,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:34:29,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:34:29,789 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:34:29,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-23 02:34:34,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-11-23 02:34:34,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:34:34,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-23 02:34:34,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:34:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 62 proven. 637 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-11-23 02:34:35,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:34:35,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:34:35,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852557516] [2022-11-23 02:34:35,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:34:35,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555216012] [2022-11-23 02:34:35,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555216012] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:34:35,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:34:35,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-11-23 02:34:35,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778013694] [2022-11-23 02:34:35,441 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:34:35,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 02:34:35,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:34:35,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 02:34:35,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-11-23 02:34:35,442 INFO L87 Difference]: Start difference. First operand 185 states and 190 transitions. Second operand has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-23 02:34:36,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:34:36,494 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2022-11-23 02:34:36,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 02:34:36,494 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 150 [2022-11-23 02:34:36,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:34:36,495 INFO L225 Difference]: With dead ends: 190 [2022-11-23 02:34:36,495 INFO L226 Difference]: Without dead ends: 185 [2022-11-23 02:34:36,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-11-23 02:34:36,496 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 7 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 02:34:36,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 925 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 02:34:36,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-23 02:34:36,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-11-23 02:34:36,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 139 states have internal predecessors, (144), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-23 02:34:36,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 189 transitions. [2022-11-23 02:34:36,517 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 189 transitions. Word has length 150 [2022-11-23 02:34:36,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:34:36,517 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 189 transitions. [2022-11-23 02:34:36,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-23 02:34:36,518 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 189 transitions. [2022-11-23 02:34:36,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-23 02:34:36,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:34:36,520 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1] [2022-11-23 02:34:36,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-23 02:34:36,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:34:36,728 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:34:36,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:34:36,729 INFO L85 PathProgramCache]: Analyzing trace with hash -439829752, now seen corresponding path program 18 times [2022-11-23 02:34:36,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:34:36,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704601109] [2022-11-23 02:34:36,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:34:36,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:34:36,745 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:34:36,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905926418] [2022-11-23 02:34:36,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 02:34:36,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:34:36,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:34:36,747 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:34:36,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-23 02:34:38,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-11-23 02:34:38,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:34:38,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-23 02:34:38,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:34:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 49 proven. 727 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-11-23 02:34:38,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:34:40,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:34:40,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704601109] [2022-11-23 02:34:40,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:34:40,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905926418] [2022-11-23 02:34:40,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905926418] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:34:40,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:34:40,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-11-23 02:34:40,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866561209] [2022-11-23 02:34:40,243 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:34:40,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 02:34:40,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:34:40,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 02:34:40,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2022-11-23 02:34:40,244 INFO L87 Difference]: Start difference. First operand 185 states and 189 transitions. Second operand has 26 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-23 02:34:41,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:34:41,431 INFO L93 Difference]: Finished difference Result 190 states and 193 transitions. [2022-11-23 02:34:41,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 02:34:41,432 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 158 [2022-11-23 02:34:41,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:34:41,433 INFO L225 Difference]: With dead ends: 190 [2022-11-23 02:34:41,433 INFO L226 Difference]: Without dead ends: 185 [2022-11-23 02:34:41,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=283, Invalid=1439, Unknown=0, NotChecked=0, Total=1722 [2022-11-23 02:34:41,435 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 7 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:34:41,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1013 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 02:34:41,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-23 02:34:41,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-11-23 02:34:41,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0287769784172662) internal successors, (143), 139 states have internal predecessors, (143), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-23 02:34:41,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 188 transitions. [2022-11-23 02:34:41,462 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 188 transitions. Word has length 158 [2022-11-23 02:34:41,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:34:41,462 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 188 transitions. [2022-11-23 02:34:41,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-23 02:34:41,463 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 188 transitions. [2022-11-23 02:34:41,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-23 02:34:41,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:34:41,465 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1] [2022-11-23 02:34:41,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-23 02:34:41,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:34:41,672 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:34:41,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:34:41,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1042741102, now seen corresponding path program 19 times [2022-11-23 02:34:41,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:34:41,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793724389] [2022-11-23 02:34:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:34:41,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:34:41,701 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:34:41,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055844336] [2022-11-23 02:34:41,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 02:34:41,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:34:41,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:34:41,704 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:34:41,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-23 02:34:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:34:42,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-23 02:34:42,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:34:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 96 proven. 761 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2022-11-23 02:34:42,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:35:34,316 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_93| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_93|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| 3)) 4) 0)))) is different from true [2022-11-23 02:35:52,363 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_93| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_93|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_269| 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-23 02:36:00,409 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 02:36:02,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:36:02,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793724389] [2022-11-23 02:36:02,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:36:02,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055844336] [2022-11-23 02:36:02,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055844336] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:36:02,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:36:02,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-11-23 02:36:02,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68478220] [2022-11-23 02:36:02,432 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:36:02,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 02:36:02,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:36:02,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 02:36:02,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=851, Unknown=13, NotChecked=180, Total=1122 [2022-11-23 02:36:02,434 INFO L87 Difference]: Start difference. First operand 185 states and 188 transitions. Second operand has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-23 02:36:03,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:36:03,654 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2022-11-23 02:36:03,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-23 02:36:03,655 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 166 [2022-11-23 02:36:03,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:36:03,656 INFO L225 Difference]: With dead ends: 190 [2022-11-23 02:36:03,656 INFO L226 Difference]: Without dead ends: 185 [2022-11-23 02:36:03,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=98, Invalid=1023, Unknown=13, NotChecked=198, Total=1332 [2022-11-23 02:36:03,657 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 6 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1149 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:36:03,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1149 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1672 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 02:36:03,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-23 02:36:03,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-11-23 02:36:03,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0215827338129497) internal successors, (142), 139 states have internal predecessors, (142), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-23 02:36:03,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2022-11-23 02:36:03,678 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 166 [2022-11-23 02:36:03,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:36:03,679 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2022-11-23 02:36:03,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-23 02:36:03,679 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2022-11-23 02:36:03,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-23 02:36:03,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:36:03,682 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1] [2022-11-23 02:36:03,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-23 02:36:03,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-23 02:36:03,889 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:36:03,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:36:03,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1976397268, now seen corresponding path program 20 times [2022-11-23 02:36:03,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:36:03,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247910335] [2022-11-23 02:36:03,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:36:03,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:36:03,898 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:36:03,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287451515] [2022-11-23 02:36:03,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:36:03,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:36:03,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:36:03,900 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:36:03,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-23 02:36:04,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:36:04,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:36:04,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-23 02:36:04,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:36:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 98 proven. 844 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2022-11-23 02:36:05,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:36:09,349 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 02:36:09,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:36:09,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247910335] [2022-11-23 02:36:09,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:36:09,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287451515] [2022-11-23 02:36:09,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287451515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:36:09,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:36:09,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-11-23 02:36:09,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102143426] [2022-11-23 02:36:09,352 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:36:09,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-23 02:36:09,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:36:09,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-23 02:36:09,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=904, Unknown=1, NotChecked=60, Total=1056 [2022-11-23 02:36:09,353 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand has 28 states, 27 states have (on average 2.740740740740741) internal successors, (74), 27 states have internal predecessors, (74), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-23 02:36:10,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:36:10,616 INFO L93 Difference]: Finished difference Result 190 states and 191 transitions. [2022-11-23 02:36:10,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-23 02:36:10,616 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.740740740740741) internal successors, (74), 27 states have internal predecessors, (74), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 174 [2022-11-23 02:36:10,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:36:10,618 INFO L225 Difference]: With dead ends: 190 [2022-11-23 02:36:10,618 INFO L226 Difference]: Without dead ends: 185 [2022-11-23 02:36:10,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=110, Invalid=1083, Unknown=1, NotChecked=66, Total=1260 [2022-11-23 02:36:10,619 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 7 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 02:36:10,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1201 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 02:36:10,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-23 02:36:10,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-11-23 02:36:10,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-23 02:36:10,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2022-11-23 02:36:10,638 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 174 [2022-11-23 02:36:10,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:36:10,638 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2022-11-23 02:36:10,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.740740740740741) internal successors, (74), 27 states have internal predecessors, (74), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-23 02:36:10,639 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2022-11-23 02:36:10,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-23 02:36:10,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:36:10,640 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1] [2022-11-23 02:36:10,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-23 02:36:10,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-23 02:36:10,846 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:36:10,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:36:10,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1172446778, now seen corresponding path program 21 times [2022-11-23 02:36:10,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:36:10,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516472940] [2022-11-23 02:36:10,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:36:10,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:36:10,861 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:36:10,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624913345] [2022-11-23 02:36:10,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:36:10,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:36:10,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:36:10,863 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:36:10,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-23 02:36:11,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-11-23 02:36:11,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:36:11,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-23 02:36:11,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:36:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 82 proven. 949 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-11-23 02:36:12,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:36:13,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:36:13,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516472940] [2022-11-23 02:36:13,035 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:36:13,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624913345] [2022-11-23 02:36:13,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624913345] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:36:13,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:36:13,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-11-23 02:36:13,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762487004] [2022-11-23 02:36:13,036 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:36:13,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-23 02:36:13,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:36:13,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-23 02:36:13,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 02:36:13,038 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 29 states, 28 states have (on average 2.75) internal successors, (77), 28 states have internal predecessors, (77), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-23 02:36:14,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:36:14,489 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2022-11-23 02:36:14,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-23 02:36:14,489 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.75) internal successors, (77), 28 states have internal predecessors, (77), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 182 [2022-11-23 02:36:14,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:36:14,491 INFO L225 Difference]: With dead ends: 192 [2022-11-23 02:36:14,491 INFO L226 Difference]: Without dead ends: 187 [2022-11-23 02:36:14,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2022-11-23 02:36:14,492 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 6 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 1968 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 1969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 02:36:14,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1349 Invalid, 1969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1968 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 02:36:14,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-23 02:36:14,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-11-23 02:36:14,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 24 states have call successors, (24), 23 states have call predecessors, (24), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-23 02:36:14,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2022-11-23 02:36:14,512 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 182 [2022-11-23 02:36:14,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:36:14,513 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2022-11-23 02:36:14,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.75) internal successors, (77), 28 states have internal predecessors, (77), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-23 02:36:14,513 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2022-11-23 02:36:14,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-11-23 02:36:14,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:36:14,515 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2022-11-23 02:36:14,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-23 02:36:14,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-23 02:36:14,723 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:36:14,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:36:14,723 INFO L85 PathProgramCache]: Analyzing trace with hash -2069758241, now seen corresponding path program 4 times [2022-11-23 02:36:14,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:36:14,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120557895] [2022-11-23 02:36:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:36:14,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:36:14,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:36:14,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455749869] [2022-11-23 02:36:14,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:36:14,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:36:14,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:36:14,741 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:36:14,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-23 02:36:15,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:36:15,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:36:15,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-23 02:36:15,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:36:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:36:15,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:36:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 968 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-11-23 02:36:16,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:36:16,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120557895] [2022-11-23 02:36:16,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:36:16,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455749869] [2022-11-23 02:36:16,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455749869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:36:16,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:36:16,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2022-11-23 02:36:16,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946179411] [2022-11-23 02:36:16,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:36:16,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-23 02:36:16,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:36:16,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-23 02:36:16,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-11-23 02:36:16,771 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand has 50 states, 50 states have (on average 4.24) internal successors, (212), 50 states have internal predecessors, (212), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-23 02:36:18,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:36:18,574 INFO L93 Difference]: Finished difference Result 497 states and 521 transitions. [2022-11-23 02:36:18,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-23 02:36:18,575 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.24) internal successors, (212), 50 states have internal predecessors, (212), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) Word has length 184 [2022-11-23 02:36:18,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:36:18,577 INFO L225 Difference]: With dead ends: 497 [2022-11-23 02:36:18,578 INFO L226 Difference]: Without dead ends: 492 [2022-11-23 02:36:18,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2022-11-23 02:36:18,581 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 613 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 02:36:18,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 443 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 02:36:18,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-11-23 02:36:18,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 377. [2022-11-23 02:36:18,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.088339222614841) internal successors, (308), 283 states have internal predecessors, (308), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-23 02:36:18,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 401 transitions. [2022-11-23 02:36:18,619 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 401 transitions. Word has length 184 [2022-11-23 02:36:18,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:36:18,620 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 401 transitions. [2022-11-23 02:36:18,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.24) internal successors, (212), 50 states have internal predecessors, (212), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-23 02:36:18,621 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 401 transitions. [2022-11-23 02:36:18,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-23 02:36:18,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:36:18,623 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1] [2022-11-23 02:36:18,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-23 02:36:18,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-23 02:36:18,831 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:36:18,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:36:18,832 INFO L85 PathProgramCache]: Analyzing trace with hash -510981984, now seen corresponding path program 22 times [2022-11-23 02:36:18,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:36:18,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146032618] [2022-11-23 02:36:18,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:36:18,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:36:18,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:36:18,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495046563] [2022-11-23 02:36:18,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:36:18,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:36:18,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:36:18,848 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:36:18,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-23 02:36:20,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:36:20,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:36:20,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-23 02:36:20,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:36:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 48 proven. 1076 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-11-23 02:36:21,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:36:21,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:36:21,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146032618] [2022-11-23 02:36:21,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:36:21,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495046563] [2022-11-23 02:36:21,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495046563] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:36:21,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:36:21,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-11-23 02:36:21,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693069343] [2022-11-23 02:36:21,463 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:36:21,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-23 02:36:21,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:36:21,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-23 02:36:21,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 02:36:21,465 INFO L87 Difference]: Start difference. First operand 377 states and 401 transitions. Second operand has 30 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-23 02:36:23,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:36:23,037 INFO L93 Difference]: Finished difference Result 382 states and 405 transitions. [2022-11-23 02:36:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-23 02:36:23,037 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 190 [2022-11-23 02:36:23,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:36:23,039 INFO L225 Difference]: With dead ends: 382 [2022-11-23 02:36:23,040 INFO L226 Difference]: Without dead ends: 377 [2022-11-23 02:36:23,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2022-11-23 02:36:23,041 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 6 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 2125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 02:36:23,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1455 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2125 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 02:36:23,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-23 02:36:23,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2022-11-23 02:36:23,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0848056537102473) internal successors, (307), 283 states have internal predecessors, (307), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-23 02:36:23,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 400 transitions. [2022-11-23 02:36:23,084 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 400 transitions. Word has length 190 [2022-11-23 02:36:23,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:36:23,084 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 400 transitions. [2022-11-23 02:36:23,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-23 02:36:23,085 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 400 transitions. [2022-11-23 02:36:23,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-11-23 02:36:23,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:36:23,086 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1] [2022-11-23 02:36:23,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-23 02:36:23,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:36:23,294 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:36:23,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:36:23,295 INFO L85 PathProgramCache]: Analyzing trace with hash -168940282, now seen corresponding path program 23 times [2022-11-23 02:36:23,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:36:23,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010988821] [2022-11-23 02:36:23,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:36:23,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:36:23,313 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:36:23,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555220153] [2022-11-23 02:36:23,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:36:23,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:36:23,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:36:23,315 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:36:23,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-23 02:36:32,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-11-23 02:36:32,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:36:32,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-23 02:36:32,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:36:33,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 95 proven. 1126 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2022-11-23 02:36:33,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:36:33,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:36:33,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010988821] [2022-11-23 02:36:33,531 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:36:33,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555220153] [2022-11-23 02:36:33,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555220153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:36:33,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:36:33,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2022-11-23 02:36:33,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280798835] [2022-11-23 02:36:33,531 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:36:33,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-23 02:36:33,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:36:33,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-23 02:36:33,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 02:36:33,533 INFO L87 Difference]: Start difference. First operand 377 states and 400 transitions. Second operand has 31 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-23 02:36:35,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:36:35,117 INFO L93 Difference]: Finished difference Result 382 states and 404 transitions. [2022-11-23 02:36:35,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-23 02:36:35,118 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 198 [2022-11-23 02:36:35,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:36:35,120 INFO L225 Difference]: With dead ends: 382 [2022-11-23 02:36:35,120 INFO L226 Difference]: Without dead ends: 377 [2022-11-23 02:36:35,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=1289, Unknown=0, NotChecked=0, Total=1406 [2022-11-23 02:36:35,122 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 7 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 2211 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 2212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 02:36:35,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1513 Invalid, 2212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2211 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 02:36:35,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-23 02:36:35,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2022-11-23 02:36:35,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0812720848056536) internal successors, (306), 283 states have internal predecessors, (306), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-23 02:36:35,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 399 transitions. [2022-11-23 02:36:35,159 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 399 transitions. Word has length 198 [2022-11-23 02:36:35,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:36:35,160 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 399 transitions. [2022-11-23 02:36:35,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-23 02:36:35,160 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 399 transitions. [2022-11-23 02:36:35,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-11-23 02:36:35,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:36:35,162 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1] [2022-11-23 02:36:35,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-23 02:36:35,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-23 02:36:35,371 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:36:35,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:36:35,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1439593620, now seen corresponding path program 24 times [2022-11-23 02:36:35,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:36:35,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893363003] [2022-11-23 02:36:35,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:36:35,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:36:35,390 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:36:35,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095427882] [2022-11-23 02:36:35,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 02:36:35,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:36:35,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:36:35,393 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:36:35,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-23 02:36:37,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-11-23 02:36:37,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:36:37,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-23 02:36:37,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:36:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 109 proven. 1213 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2022-11-23 02:36:38,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:36:38,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:36:38,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893363003] [2022-11-23 02:36:38,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:36:38,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095427882] [2022-11-23 02:36:38,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095427882] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:36:38,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:36:38,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-11-23 02:36:38,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741241352] [2022-11-23 02:36:38,912 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:36:38,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-23 02:36:38,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:36:38,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-23 02:36:38,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2022-11-23 02:36:38,914 INFO L87 Difference]: Start difference. First operand 377 states and 399 transitions. Second operand has 32 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 26 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-23 02:36:40,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:36:40,738 INFO L93 Difference]: Finished difference Result 382 states and 403 transitions. [2022-11-23 02:36:40,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-23 02:36:40,739 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 26 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 206 [2022-11-23 02:36:40,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:36:40,741 INFO L225 Difference]: With dead ends: 382 [2022-11-23 02:36:40,741 INFO L226 Difference]: Without dead ends: 377 [2022-11-23 02:36:40,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2022-11-23 02:36:40,742 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 6 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 2457 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 2458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-23 02:36:40,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1679 Invalid, 2458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2457 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-23 02:36:40,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-23 02:36:40,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2022-11-23 02:36:40,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0777385159010602) internal successors, (305), 283 states have internal predecessors, (305), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-23 02:36:40,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 398 transitions. [2022-11-23 02:36:40,779 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 398 transitions. Word has length 206 [2022-11-23 02:36:40,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:36:40,779 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 398 transitions. [2022-11-23 02:36:40,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 26 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-23 02:36:40,780 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 398 transitions. [2022-11-23 02:36:40,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-23 02:36:40,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:36:40,781 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1] [2022-11-23 02:36:40,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-23 02:36:40,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:36:40,990 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:36:40,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:36:40,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1619319854, now seen corresponding path program 25 times [2022-11-23 02:36:40,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:36:40,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047326982] [2022-11-23 02:36:40,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:36:40,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:36:41,004 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:36:41,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033245159] [2022-11-23 02:36:41,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 02:36:41,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:36:41,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:36:41,006 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:36:41,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-23 02:36:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:36:41,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-23 02:36:41,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:36:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 126 proven. 1301 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2022-11-23 02:36:42,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:36:46,782 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 02:37:02,827 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_111| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_111|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| 3)) 4) 0)))) is different from true [2022-11-23 02:37:20,883 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_111| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_111|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_422| 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-23 02:37:28,924 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 02:37:30,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:37:30,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047326982] [2022-11-23 02:37:30,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:37:30,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033245159] [2022-11-23 02:37:30,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033245159] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:37:30,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:37:30,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2022-11-23 02:37:30,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326343654] [2022-11-23 02:37:30,948 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:37:30,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-23 02:37:30,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:37:30,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-23 02:37:30,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1187, Unknown=4, NotChecked=284, Total=1560 [2022-11-23 02:37:30,949 INFO L87 Difference]: Start difference. First operand 377 states and 398 transitions. Second operand has 33 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 27 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-23 02:37:32,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:37:32,857 INFO L93 Difference]: Finished difference Result 382 states and 402 transitions. [2022-11-23 02:37:32,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 02:37:32,858 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 27 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 214 [2022-11-23 02:37:32,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:37:32,860 INFO L225 Difference]: With dead ends: 382 [2022-11-23 02:37:32,861 INFO L226 Difference]: Without dead ends: 377 [2022-11-23 02:37:32,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=104, Invalid=1390, Unknown=4, NotChecked=308, Total=1806 [2022-11-23 02:37:32,862 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 6 mSDsluCounter, 1712 mSDsCounter, 0 mSdLazyCounter, 2632 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 2633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-23 02:37:32,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1797 Invalid, 2633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2632 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-23 02:37:32,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-23 02:37:32,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2022-11-23 02:37:32,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0742049469964665) internal successors, (304), 283 states have internal predecessors, (304), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-23 02:37:32,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 397 transitions. [2022-11-23 02:37:32,901 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 397 transitions. Word has length 214 [2022-11-23 02:37:32,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:37:32,901 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 397 transitions. [2022-11-23 02:37:32,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 27 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-23 02:37:32,902 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 397 transitions. [2022-11-23 02:37:32,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-23 02:37:32,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:37:32,904 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1] [2022-11-23 02:37:32,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-23 02:37:33,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:37:33,111 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:37:33,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:37:33,112 INFO L85 PathProgramCache]: Analyzing trace with hash -252643784, now seen corresponding path program 26 times [2022-11-23 02:37:33,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:37:33,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080530397] [2022-11-23 02:37:33,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:37:33,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:37:33,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:37:33,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823250092] [2022-11-23 02:37:33,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:37:33,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:37:33,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:37:33,122 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:37:33,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-23 02:37:34,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:37:34,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:37:34,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 120 conjunts are in the unsatisfiable core [2022-11-23 02:37:34,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:37:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 128 proven. 1408 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2022-11-23 02:37:35,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:37:40,101 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-23 02:37:40,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:37:40,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080530397] [2022-11-23 02:37:40,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:37:40,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823250092] [2022-11-23 02:37:40,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823250092] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:37:40,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:37:40,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2022-11-23 02:37:40,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496802804] [2022-11-23 02:37:40,104 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:37:40,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-23 02:37:40,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:37:40,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-23 02:37:40,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1300, Unknown=1, NotChecked=72, Total=1482 [2022-11-23 02:37:40,106 INFO L87 Difference]: Start difference. First operand 377 states and 397 transitions. Second operand has 34 states, 33 states have (on average 2.787878787878788) internal successors, (92), 33 states have internal predecessors, (92), 28 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-23 02:37:42,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:37:42,056 INFO L93 Difference]: Finished difference Result 382 states and 401 transitions. [2022-11-23 02:37:42,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-23 02:37:42,057 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.787878787878788) internal successors, (92), 33 states have internal predecessors, (92), 28 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 222 [2022-11-23 02:37:42,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:37:42,059 INFO L225 Difference]: With dead ends: 382 [2022-11-23 02:37:42,059 INFO L226 Difference]: Without dead ends: 377 [2022-11-23 02:37:42,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=128, Invalid=1515, Unknown=1, NotChecked=78, Total=1722 [2022-11-23 02:37:42,060 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 6 mSDsluCounter, 1831 mSDsCounter, 0 mSdLazyCounter, 2813 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1919 SdHoareTripleChecker+Invalid, 2814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-23 02:37:42,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1919 Invalid, 2814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2813 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-23 02:37:42,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-23 02:37:42,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2022-11-23 02:37:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0706713780918728) internal successors, (303), 283 states have internal predecessors, (303), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-23 02:37:42,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 396 transitions. [2022-11-23 02:37:42,095 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 396 transitions. Word has length 222 [2022-11-23 02:37:42,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:37:42,096 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 396 transitions. [2022-11-23 02:37:42,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.787878787878788) internal successors, (92), 33 states have internal predecessors, (92), 28 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-23 02:37:42,096 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 396 transitions. [2022-11-23 02:37:42,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-23 02:37:42,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:37:42,098 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1] [2022-11-23 02:37:42,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-23 02:37:42,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-23 02:37:42,306 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:37:42,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:37:42,307 INFO L85 PathProgramCache]: Analyzing trace with hash 867762846, now seen corresponding path program 27 times [2022-11-23 02:37:42,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:37:42,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667055087] [2022-11-23 02:37:42,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:37:42,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:37:42,325 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:37:42,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250532873] [2022-11-23 02:37:42,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:37:42,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:37:42,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:37:42,326 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:37:42,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0e9f94a-75f7-42f5-b512-8b4448e34aa2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-23 02:37:44,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-11-23 02:37:44,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:37:44,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 125 conjunts are in the unsatisfiable core [2022-11-23 02:37:44,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:37:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 118 proven. 1531 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2022-11-23 02:37:46,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:38:49,015 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_148| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| Int)) (or (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| 12) 36 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487|)) (+ (* 6 |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_148|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_148|))) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| 3)) 4) 0)))) is different from true [2022-11-23 02:39:07,066 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_148| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| Int)) (or (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| 12) 36 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487|)) (+ (* 6 |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_148|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_148|))) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_487| 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true