./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.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_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/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_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/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_2e90b8df-24f8-4561-a695-7d00e185ab8e/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 39b854852f8258ff198098e27d83a5b0e296df48090ebea0d59d234417af0752 --- 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 02:46:53,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:46:53,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:46:53,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:46:53,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:46:53,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:46:53,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:46:53,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:46:53,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:46:53,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:46:53,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:46:53,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:46:53,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:46:53,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:46:53,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:46:53,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:46:53,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:46:53,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:46:53,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:46:53,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:46:53,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:46:53,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:46:53,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:46:53,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:46:53,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:46:53,702 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:46:53,702 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:46:53,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:46:53,706 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:46:53,707 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:46:53,708 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:46:53,709 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:46:53,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:46:53,714 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:46:53,715 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:46:53,716 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:46:53,717 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:46:53,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:46:53,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:46:53,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:46:53,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:46:53,721 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 02:46:53,777 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:46:53,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:46:53,779 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:46:53,779 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:46:53,781 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:46:53,781 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:46:53,782 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:46:53,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:46:53,783 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:46:53,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:46:53,785 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:46:53,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:46:53,786 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:46:53,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:46:53,787 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 02:46:53,787 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:46:53,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 02:46:53,788 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:46:53,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 02:46:53,788 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:46:53,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 02:46:53,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:46:53,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:46:53,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:46:53,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:46:53,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:46:53,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:46:53,792 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 02:46:53,793 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 02:46:53,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 02:46:53,794 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:46:53,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 02:46:53,795 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:46:53,795 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:46:53,795 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_2e90b8df-24f8-4561-a695-7d00e185ab8e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39b854852f8258ff198098e27d83a5b0e296df48090ebea0d59d234417af0752 [2022-11-23 02:46:54,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:46:54,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:46:54,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:46:54,227 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:46:54,228 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:46:54,229 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c [2022-11-23 02:46:57,528 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:46:57,791 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:46:57,791 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c [2022-11-23 02:46:57,804 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/data/2c66dbe95/dc577bf7bbe641879a45176b11593939/FLAG4cdd8d2c5 [2022-11-23 02:46:57,833 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/data/2c66dbe95/dc577bf7bbe641879a45176b11593939 [2022-11-23 02:46:57,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:46:57,840 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:46:57,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:46:57,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:46:57,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:46:57,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:46:57" (1/1) ... [2022-11-23 02:46:57,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c11b4b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:57, skipping insertion in model container [2022-11-23 02:46:57,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:46:57" (1/1) ... [2022-11-23 02:46:57,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:46:57,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:46:58,133 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_2e90b8df-24f8-4561-a695-7d00e185ab8e/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c[490,503] [2022-11-23 02:46:58,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:46:58,177 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 02:46:58,193 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_2e90b8df-24f8-4561-a695-7d00e185ab8e/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c[490,503] [2022-11-23 02:46:58,205 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:46:58,227 INFO L208 MainTranslator]: Completed translation [2022-11-23 02:46:58,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:58 WrapperNode [2022-11-23 02:46:58,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:46:58,229 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 02:46:58,230 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 02:46:58,230 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 02:46:58,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:58" (1/1) ... [2022-11-23 02:46:58,246 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:58" (1/1) ... [2022-11-23 02:46:58,266 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2022-11-23 02:46:58,266 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 02:46:58,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 02:46:58,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 02:46:58,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 02:46:58,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:58" (1/1) ... [2022-11-23 02:46:58,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:58" (1/1) ... [2022-11-23 02:46:58,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:58" (1/1) ... [2022-11-23 02:46:58,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:58" (1/1) ... [2022-11-23 02:46:58,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:58" (1/1) ... [2022-11-23 02:46:58,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:58" (1/1) ... [2022-11-23 02:46:58,298 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:58" (1/1) ... [2022-11-23 02:46:58,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:58" (1/1) ... [2022-11-23 02:46:58,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 02:46:58,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 02:46:58,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 02:46:58,303 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 02:46:58,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:58" (1/1) ... [2022-11-23 02:46:58,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:46:58,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:46:58,347 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 02:46:58,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 02:46:58,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 02:46:58,419 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 02:46:58,420 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 02:46:58,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 02:46:58,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 02:46:58,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 02:46:58,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 02:46:58,421 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 02:46:58,519 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 02:46:58,522 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 02:46:58,728 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 02:46:58,736 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 02:46:58,737 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 02:46:58,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:46:58 BoogieIcfgContainer [2022-11-23 02:46:58,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 02:46:58,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 02:46:58,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 02:46:58,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 02:46:58,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:46:57" (1/3) ... [2022-11-23 02:46:58,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eaea5fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:46:58, skipping insertion in model container [2022-11-23 02:46:58,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:58" (2/3) ... [2022-11-23 02:46:58,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eaea5fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:46:58, skipping insertion in model container [2022-11-23 02:46:58,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:46:58" (3/3) ... [2022-11-23 02:46:58,752 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound20.c [2022-11-23 02:46:58,779 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 02:46:58,780 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 02:46:58,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:46:58,857 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;@400fbca5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:46:58,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 02:46:58,863 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 02:46:58,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 02:46:58,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:46:58,874 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:46:58,874 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:46:58,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:46:58,881 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2022-11-23 02:46:58,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:46:58,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102182286] [2022-11-23 02:46:58,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:46:58,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:46:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:46:59,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:46:59,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102182286] [2022-11-23 02:46:59,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-23 02:46:59,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014748687] [2022-11-23 02:46:59,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:46:59,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:46:59,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:46:59,060 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:46:59,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 02:46:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:46:59,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-23 02:46:59,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:46:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 02:46:59,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:46:59,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014748687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:46:59,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:46:59,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:46:59,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712469715] [2022-11-23 02:46:59,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:46:59,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 02:46:59,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:46:59,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 02:46:59,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 02:46:59,311 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 02:46:59,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:46:59,373 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2022-11-23 02:46:59,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 02:46:59,388 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-11-23 02:46:59,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:46:59,413 INFO L225 Difference]: With dead ends: 67 [2022-11-23 02:46:59,413 INFO L226 Difference]: Without dead ends: 31 [2022-11-23 02:46:59,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 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 02:46:59,451 INFO L413 NwaCegarLoop]: 44 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, 44 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 02:46:59,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 02:46:59,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-23 02:46:59,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-23 02:46:59,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 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 02:46:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2022-11-23 02:46:59,505 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2022-11-23 02:46:59,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:46:59,506 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2022-11-23 02:46:59,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 02:46:59,506 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2022-11-23 02:46:59,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 02:46:59,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:46:59,509 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:46:59,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 02:46:59,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-23 02:46:59,727 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:46:59,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:46:59,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2022-11-23 02:46:59,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:46:59,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815683638] [2022-11-23 02:46:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:46:59,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:46:59,787 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:46:59,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818950241] [2022-11-23 02:46:59,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:46:59,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:46:59,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:46:59,804 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:46:59,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 02:46:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:46:59,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 02:46:59,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:00,064 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 02:47:00,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:47:00,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:47:00,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815683638] [2022-11-23 02:47:00,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:47:00,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818950241] [2022-11-23 02:47:00,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818950241] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:47:00,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:47:00,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 02:47:00,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682885134] [2022-11-23 02:47:00,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:47:00,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 02:47:00,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:47:00,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 02:47:00,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 02:47:00,083 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 02:47:00,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:47:00,246 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-11-23 02:47:00,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 02:47:00,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2022-11-23 02:47:00,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:47:00,249 INFO L225 Difference]: With dead ends: 50 [2022-11-23 02:47:00,249 INFO L226 Difference]: Without dead ends: 43 [2022-11-23 02:47:00,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-23 02:47:00,252 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:47:00,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 113 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 02:47:00,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-23 02:47:00,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2022-11-23 02:47:00,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 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 02:47:00,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-11-23 02:47:00,271 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2022-11-23 02:47:00,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:47:00,272 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-11-23 02:47:00,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 02:47:00,273 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-11-23 02:47:00,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 02:47:00,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:47:00,275 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:47:00,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 02:47:00,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:47:00,479 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:47:00,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:00,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2022-11-23 02:47:00,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:47:00,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704637987] [2022-11-23 02:47:00,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:00,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:47:00,505 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:47:00,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90000258] [2022-11-23 02:47:00,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:00,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:47:00,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:47:00,507 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:47:00,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 02:47:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:47:00,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 02:47:00,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 02:47:00,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:47:00,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:47:00,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704637987] [2022-11-23 02:47:00,799 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:47:00,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90000258] [2022-11-23 02:47:00,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90000258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:47:00,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:47:00,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 02:47:00,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74696394] [2022-11-23 02:47:00,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:47:00,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 02:47:00,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:47:00,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 02:47:00,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 02:47:00,807 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 02:47:00,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:47:00,971 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-11-23 02:47:00,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 02:47:00,972 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-11-23 02:47:00,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:47:00,973 INFO L225 Difference]: With dead ends: 49 [2022-11-23 02:47:00,974 INFO L226 Difference]: Without dead ends: 47 [2022-11-23 02:47:00,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-23 02:47:00,976 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 29 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:47:00,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 161 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 02:47:00,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-23 02:47:00,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-11-23 02:47:01,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-23 02:47:01,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-11-23 02:47:01,013 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2022-11-23 02:47:01,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:47:01,014 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-11-23 02:47:01,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 02:47:01,015 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-11-23 02:47:01,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 02:47:01,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:47:01,018 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:47:01,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 02:47:01,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:47:01,225 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:47:01,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:01,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2022-11-23 02:47:01,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:47:01,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771934208] [2022-11-23 02:47:01,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:01,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:47:01,261 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:47:01,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262973388] [2022-11-23 02:47:01,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:01,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:47:01,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:47:01,266 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:47:01,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 02:47:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:47:01,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 02:47:01,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 02:47:01,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:47:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 02:47:01,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:47:01,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771934208] [2022-11-23 02:47:01,585 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:47:01,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262973388] [2022-11-23 02:47:01,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262973388] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:47:01,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:47:01,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-23 02:47:01,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317932189] [2022-11-23 02:47:01,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:47:01,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 02:47:01,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:47:01,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 02:47:01,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-23 02:47:01,590 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 02:47:01,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:47:01,967 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2022-11-23 02:47:01,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 02:47:01,967 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-11-23 02:47:01,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:47:01,969 INFO L225 Difference]: With dead ends: 99 [2022-11-23 02:47:01,970 INFO L226 Difference]: Without dead ends: 92 [2022-11-23 02:47:01,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-23 02:47:01,972 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 61 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 02:47:01,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 242 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 02:47:01,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-23 02:47:01,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2022-11-23 02:47:01,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-23 02:47:01,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2022-11-23 02:47:01,994 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2022-11-23 02:47:01,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:47:01,995 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2022-11-23 02:47:01,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 02:47:01,996 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2022-11-23 02:47:01,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-23 02:47:01,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:47:01,997 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:47:02,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 02:47:02,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:47:02,204 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:47:02,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:02,205 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2022-11-23 02:47:02,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:47:02,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191128796] [2022-11-23 02:47:02,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:02,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:47:02,224 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:47:02,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481663732] [2022-11-23 02:47:02,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:02,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:47:02,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:47:02,226 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:47:02,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 02:47:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:47:02,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 02:47:02,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 02:47:02,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:47:02,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:47:02,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191128796] [2022-11-23 02:47:02,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:47:02,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481663732] [2022-11-23 02:47:02,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481663732] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:47:02,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:47:02,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-11-23 02:47:02,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303184220] [2022-11-23 02:47:02,501 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:47:02,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:47:02,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:47:02,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:47:02,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-23 02:47:02,502 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 02:47:02,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:47:02,635 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2022-11-23 02:47:02,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 02:47:02,636 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2022-11-23 02:47:02,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:47:02,638 INFO L225 Difference]: With dead ends: 75 [2022-11-23 02:47:02,638 INFO L226 Difference]: Without dead ends: 73 [2022-11-23 02:47:02,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-23 02:47:02,639 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:47:02,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 145 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 02:47:02,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-23 02:47:02,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-11-23 02:47:02,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-23 02:47:02,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2022-11-23 02:47:02,663 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2022-11-23 02:47:02,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:47:02,663 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2022-11-23 02:47:02,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 02:47:02,664 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2022-11-23 02:47:02,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-23 02:47:02,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:47:02,665 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:47:02,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-23 02:47:02,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:47:02,870 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:47:02,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:02,871 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2022-11-23 02:47:02,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:47:02,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577769808] [2022-11-23 02:47:02,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:02,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:47:02,888 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:47:02,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031991638] [2022-11-23 02:47:02,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:02,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:47:02,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:47:02,890 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:47:02,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 02:47:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:47:02,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 02:47:02,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 02:47:03,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:47:03,431 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 02:47:03,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:47:03,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577769808] [2022-11-23 02:47:03,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:47:03,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031991638] [2022-11-23 02:47:03,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031991638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:47:03,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:47:03,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2022-11-23 02:47:03,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492457005] [2022-11-23 02:47:03,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:47:03,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 02:47:03,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:47:03,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 02:47:03,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-23 02:47:03,436 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-23 02:47:03,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:47:03,732 INFO L93 Difference]: Finished difference Result 107 states and 143 transitions. [2022-11-23 02:47:03,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 02:47:03,734 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 38 [2022-11-23 02:47:03,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:47:03,736 INFO L225 Difference]: With dead ends: 107 [2022-11-23 02:47:03,736 INFO L226 Difference]: Without dead ends: 105 [2022-11-23 02:47:03,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-11-23 02:47:03,739 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 54 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 02:47:03,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 259 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 02:47:03,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-23 02:47:03,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2022-11-23 02:47:03,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-23 02:47:03,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 137 transitions. [2022-11-23 02:47:03,789 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 137 transitions. Word has length 38 [2022-11-23 02:47:03,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:47:03,790 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 137 transitions. [2022-11-23 02:47:03,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-23 02:47:03,790 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 137 transitions. [2022-11-23 02:47:03,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-23 02:47:03,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:47:03,798 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:47:03,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-23 02:47:04,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:47:04,005 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:47:04,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:04,005 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2022-11-23 02:47:04,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:47:04,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069307879] [2022-11-23 02:47:04,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:04,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:47:04,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:47:04,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372717588] [2022-11-23 02:47:04,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:04,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:47:04,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:47:04,024 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:47:04,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 02:47:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:47:04,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 02:47:04,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 02:47:04,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:47:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 02:47:06,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:47:06,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069307879] [2022-11-23 02:47:06,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:47:06,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372717588] [2022-11-23 02:47:06,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372717588] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 02:47:06,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:47:06,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2022-11-23 02:47:06,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783545611] [2022-11-23 02:47:06,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:47:06,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 02:47:06,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:47:06,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 02:47:06,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-23 02:47:06,137 INFO L87 Difference]: Start difference. First operand 101 states and 137 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 02:47:06,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:47:06,253 INFO L93 Difference]: Finished difference Result 147 states and 209 transitions. [2022-11-23 02:47:06,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 02:47:06,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-11-23 02:47:06,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:47:06,256 INFO L225 Difference]: With dead ends: 147 [2022-11-23 02:47:06,256 INFO L226 Difference]: Without dead ends: 145 [2022-11-23 02:47:06,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-23 02:47:06,258 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:47:06,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 124 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 02:47:06,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-23 02:47:06,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 139. [2022-11-23 02:47:06,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 88 states have internal predecessors, (112), 45 states have call successors, (45), 6 states have call predecessors, (45), 6 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-23 02:47:06,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 201 transitions. [2022-11-23 02:47:06,320 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 201 transitions. Word has length 43 [2022-11-23 02:47:06,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:47:06,321 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 201 transitions. [2022-11-23 02:47:06,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 02:47:06,321 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 201 transitions. [2022-11-23 02:47:06,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-23 02:47:06,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:47:06,323 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:47:06,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 02:47:06,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 02:47:06,531 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:47:06,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:06,532 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2022-11-23 02:47:06,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:47:06,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164391942] [2022-11-23 02:47:06,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:06,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:47:06,566 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:47:06,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058459599] [2022-11-23 02:47:06,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:06,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:47:06,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:47:06,573 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:47:06,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 02:47:06,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:47:06,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-23 02:47:06,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 02:47:07,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:47:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 02:47:07,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:47:07,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164391942] [2022-11-23 02:47:07,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:47:07,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058459599] [2022-11-23 02:47:07,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058459599] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:47:07,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:47:07,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 19 [2022-11-23 02:47:07,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988295061] [2022-11-23 02:47:07,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:47:07,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 02:47:07,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:47:07,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 02:47:07,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-11-23 02:47:07,652 INFO L87 Difference]: Start difference. First operand 139 states and 201 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-23 02:47:12,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:47:12,259 INFO L93 Difference]: Finished difference Result 198 states and 280 transitions. [2022-11-23 02:47:12,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 02:47:12,266 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 43 [2022-11-23 02:47:12,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:47:12,269 INFO L225 Difference]: With dead ends: 198 [2022-11-23 02:47:12,270 INFO L226 Difference]: Without dead ends: 196 [2022-11-23 02:47:12,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=211, Invalid=911, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 02:47:12,271 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 183 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-23 02:47:12,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 203 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-23 02:47:12,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-23 02:47:12,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 171. [2022-11-23 02:47:12,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 111 states have (on average 1.2612612612612613) internal successors, (140), 115 states have internal predecessors, (140), 51 states have call successors, (51), 8 states have call predecessors, (51), 8 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-23 02:47:12,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 241 transitions. [2022-11-23 02:47:12,344 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 241 transitions. Word has length 43 [2022-11-23 02:47:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:47:12,344 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 241 transitions. [2022-11-23 02:47:12,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-23 02:47:12,347 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 241 transitions. [2022-11-23 02:47:12,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-23 02:47:12,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:47:12,352 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:47:12,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 02:47:12,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:47:12,559 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:47:12,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:12,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2022-11-23 02:47:12,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:47:12,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136885106] [2022-11-23 02:47:12,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:12,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:47:12,576 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:47:12,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310161833] [2022-11-23 02:47:12,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:47:12,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:47:12,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:47:12,579 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:47:12,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 02:47:12,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:47:12,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:47:12,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 02:47:12,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 02:47:12,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:47:12,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:47:12,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136885106] [2022-11-23 02:47:12,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:47:12,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310161833] [2022-11-23 02:47:12,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310161833] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:47:12,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:47:12,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 02:47:12,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14346771] [2022-11-23 02:47:12,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:47:12,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 02:47:12,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:47:12,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 02:47:12,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:47:12,720 INFO L87 Difference]: Start difference. First operand 171 states and 241 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 02:47:12,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:47:12,939 INFO L93 Difference]: Finished difference Result 217 states and 301 transitions. [2022-11-23 02:47:12,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 02:47:12,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-11-23 02:47:12,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:47:12,942 INFO L225 Difference]: With dead ends: 217 [2022-11-23 02:47:12,942 INFO L226 Difference]: Without dead ends: 136 [2022-11-23 02:47:12,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:47:12,944 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:47:12,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 139 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 02:47:12,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-23 02:47:13,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 113. [2022-11-23 02:47:13,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 74 states have internal predecessors, (84), 33 states have call successors, (33), 8 states have call predecessors, (33), 8 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-23 02:47:13,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 149 transitions. [2022-11-23 02:47:13,017 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 149 transitions. Word has length 43 [2022-11-23 02:47:13,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:47:13,018 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 149 transitions. [2022-11-23 02:47:13,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 02:47:13,018 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 149 transitions. [2022-11-23 02:47:13,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-23 02:47:13,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:47:13,020 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:47:13,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 02:47:13,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-23 02:47:13,227 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:47:13,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:13,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2022-11-23 02:47:13,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:47:13,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660554541] [2022-11-23 02:47:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:13,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:47:13,244 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:47:13,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639051040] [2022-11-23 02:47:13,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:13,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:47:13,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:47:13,246 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:47:13,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 02:47:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:47:13,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 02:47:13,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 02:47:13,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:47:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 02:47:14,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:47:14,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660554541] [2022-11-23 02:47:14,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:47:14,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639051040] [2022-11-23 02:47:14,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639051040] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 02:47:14,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:47:14,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2022-11-23 02:47:14,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995517214] [2022-11-23 02:47:14,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:47:14,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 02:47:14,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:47:14,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 02:47:14,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-23 02:47:14,218 INFO L87 Difference]: Start difference. First operand 113 states and 149 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 02:47:14,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:47:14,337 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2022-11-23 02:47:14,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 02:47:14,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2022-11-23 02:47:14,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:47:14,340 INFO L225 Difference]: With dead ends: 119 [2022-11-23 02:47:14,340 INFO L226 Difference]: Without dead ends: 117 [2022-11-23 02:47:14,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-23 02:47:14,342 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:47:14,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 122 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 02:47:14,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-23 02:47:14,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-11-23 02:47:14,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 77 states have internal predecessors, (87), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-23 02:47:14,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 152 transitions. [2022-11-23 02:47:14,393 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 152 transitions. Word has length 48 [2022-11-23 02:47:14,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:47:14,393 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 152 transitions. [2022-11-23 02:47:14,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 02:47:14,394 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 152 transitions. [2022-11-23 02:47:14,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-23 02:47:14,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:47:14,395 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:47:14,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 02:47:14,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 02:47:14,603 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:47:14,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:14,603 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2022-11-23 02:47:14,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:47:14,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122979648] [2022-11-23 02:47:14,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:14,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:47:14,618 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:47:14,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823176291] [2022-11-23 02:47:14,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:14,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:47:14,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:47:14,621 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:47:14,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 02:47:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:47:14,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-23 02:47:14,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 02:47:16,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:47:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 02:47:18,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:47:18,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122979648] [2022-11-23 02:47:18,202 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:47:18,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823176291] [2022-11-23 02:47:18,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823176291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:47:18,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:47:18,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 27 [2022-11-23 02:47:18,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247828568] [2022-11-23 02:47:18,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:47:18,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 02:47:18,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:47:18,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 02:47:18,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-11-23 02:47:18,205 INFO L87 Difference]: Start difference. First operand 117 states and 152 transitions. Second operand has 27 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 9 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-23 02:47:43,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:47:43,795 INFO L93 Difference]: Finished difference Result 336 states and 470 transitions. [2022-11-23 02:47:43,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-23 02:47:43,796 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 9 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) Word has length 60 [2022-11-23 02:47:43,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:47:43,803 INFO L225 Difference]: With dead ends: 336 [2022-11-23 02:47:43,803 INFO L226 Difference]: Without dead ends: 248 [2022-11-23 02:47:43,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=448, Invalid=2204, Unknown=0, NotChecked=0, Total=2652 [2022-11-23 02:47:43,808 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 167 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2022-11-23 02:47:43,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 244 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2022-11-23 02:47:43,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-23 02:47:43,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 195. [2022-11-23 02:47:43,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 126 states have (on average 1.1904761904761905) internal successors, (150), 128 states have internal predecessors, (150), 55 states have call successors, (55), 13 states have call predecessors, (55), 13 states have return successors, (54), 53 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-23 02:47:43,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 259 transitions. [2022-11-23 02:47:43,973 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 259 transitions. Word has length 60 [2022-11-23 02:47:43,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:47:43,974 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 259 transitions. [2022-11-23 02:47:43,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 9 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-23 02:47:43,975 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 259 transitions. [2022-11-23 02:47:43,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-23 02:47:43,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:47:43,976 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:47:43,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 02:47:44,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:47:44,183 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:47:44,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:44,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2022-11-23 02:47:44,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:47:44,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368362126] [2022-11-23 02:47:44,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:44,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:47:44,221 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:47:44,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126850901] [2022-11-23 02:47:44,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:44,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:47:44,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:47:44,231 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:47:44,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 02:47:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:47:44,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 02:47:44,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:45,431 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 02:47:45,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:47:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-23 02:47:45,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:47:45,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368362126] [2022-11-23 02:47:45,892 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:47:45,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126850901] [2022-11-23 02:47:45,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126850901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:47:45,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:47:45,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2022-11-23 02:47:45,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039189069] [2022-11-23 02:47:45,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:47:45,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-23 02:47:45,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:47:45,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-23 02:47:45,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-11-23 02:47:45,896 INFO L87 Difference]: Start difference. First operand 195 states and 259 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-23 02:48:19,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 02:48:22,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:48:22,762 INFO L93 Difference]: Finished difference Result 322 states and 453 transitions. [2022-11-23 02:48:22,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-23 02:48:22,763 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 68 [2022-11-23 02:48:22,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:48:22,765 INFO L225 Difference]: With dead ends: 322 [2022-11-23 02:48:22,765 INFO L226 Difference]: Without dead ends: 320 [2022-11-23 02:48:22,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=424, Invalid=2126, Unknown=0, NotChecked=0, Total=2550 [2022-11-23 02:48:22,767 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 168 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2022-11-23 02:48:22,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 376 Invalid, 1725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 14.5s Time] [2022-11-23 02:48:22,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-23 02:48:22,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 203. [2022-11-23 02:48:22,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 132 states have (on average 1.1818181818181819) internal successors, (156), 134 states have internal predecessors, (156), 55 states have call successors, (55), 15 states have call predecessors, (55), 15 states have return successors, (54), 53 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-23 02:48:22,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 265 transitions. [2022-11-23 02:48:22,868 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 265 transitions. Word has length 68 [2022-11-23 02:48:22,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:48:22,868 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 265 transitions. [2022-11-23 02:48:22,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-23 02:48:22,869 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 265 transitions. [2022-11-23 02:48:22,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 02:48:22,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:48:22,869 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:48:22,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 02:48:23,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:48:23,070 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:48:23,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:48:23,070 INFO L85 PathProgramCache]: Analyzing trace with hash 798002477, now seen corresponding path program 2 times [2022-11-23 02:48:23,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:48:23,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517916254] [2022-11-23 02:48:23,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:48:23,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:48:23,081 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:48:23,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127108351] [2022-11-23 02:48:23,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:48:23,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:48:23,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:48:23,083 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:48:23,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 02:48:23,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:48:23,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:48:23,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 02:48:23,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:48:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-23 02:48:23,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:48:23,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:48:23,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517916254] [2022-11-23 02:48:23,185 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:48:23,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127108351] [2022-11-23 02:48:23,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127108351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:48:23,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:48:23,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 02:48:23,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653096134] [2022-11-23 02:48:23,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:48:23,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 02:48:23,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:48:23,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 02:48:23,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:48:23,191 INFO L87 Difference]: Start difference. First operand 203 states and 265 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 02:48:23,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:48:23,408 INFO L93 Difference]: Finished difference Result 363 states and 487 transitions. [2022-11-23 02:48:23,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 02:48:23,408 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 73 [2022-11-23 02:48:23,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:48:23,410 INFO L225 Difference]: With dead ends: 363 [2022-11-23 02:48:23,410 INFO L226 Difference]: Without dead ends: 241 [2022-11-23 02:48:23,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-23 02:48:23,412 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 4 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 02:48:23,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 123 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 02:48:23,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-23 02:48:23,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 227. [2022-11-23 02:48:23,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 140 states have (on average 1.1785714285714286) internal successors, (165), 142 states have internal predecessors, (165), 71 states have call successors, (71), 15 states have call predecessors, (71), 15 states have return successors, (70), 69 states have call predecessors, (70), 70 states have call successors, (70) [2022-11-23 02:48:23,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 306 transitions. [2022-11-23 02:48:23,534 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 306 transitions. Word has length 73 [2022-11-23 02:48:23,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:48:23,534 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 306 transitions. [2022-11-23 02:48:23,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 02:48:23,535 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 306 transitions. [2022-11-23 02:48:23,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 02:48:23,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:48:23,536 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:48:23,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 02:48:23,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:48:23,747 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:48:23,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:48:23,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1622368081, now seen corresponding path program 3 times [2022-11-23 02:48:23,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:48:23,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815718747] [2022-11-23 02:48:23,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:48:23,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:48:23,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:48:23,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368376342] [2022-11-23 02:48:23,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:48:23,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:48:23,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:48:23,768 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:48:23,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 02:48:23,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 02:48:23,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:48:23,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-23 02:48:23,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:48:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-23 02:48:24,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:48:25,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:48:25,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815718747] [2022-11-23 02:48:25,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:48:25,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368376342] [2022-11-23 02:48:25,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368376342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:48:25,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:48:25,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-11-23 02:48:25,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002008278] [2022-11-23 02:48:25,024 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 02:48:25,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 02:48:25,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:48:25,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 02:48:25,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-11-23 02:48:25,026 INFO L87 Difference]: Start difference. First operand 227 states and 306 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 02:48:26,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:48:26,312 INFO L93 Difference]: Finished difference Result 321 states and 435 transitions. [2022-11-23 02:48:26,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 02:48:26,313 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2022-11-23 02:48:26,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:48:26,316 INFO L225 Difference]: With dead ends: 321 [2022-11-23 02:48:26,317 INFO L226 Difference]: Without dead ends: 319 [2022-11-23 02:48:26,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-11-23 02:48:26,318 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 71 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 02:48:26,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 303 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 02:48:26,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-11-23 02:48:26,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 306. [2022-11-23 02:48:26,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 184 states have (on average 1.190217391304348) internal successors, (219), 185 states have internal predecessors, (219), 101 states have call successors, (101), 20 states have call predecessors, (101), 20 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-23 02:48:26,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 420 transitions. [2022-11-23 02:48:26,535 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 420 transitions. Word has length 73 [2022-11-23 02:48:26,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:48:26,535 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 420 transitions. [2022-11-23 02:48:26,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 02:48:26,536 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 420 transitions. [2022-11-23 02:48:26,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-23 02:48:26,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:48:26,538 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:48:26,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 02:48:26,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:48:26,744 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:48:26,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:48:26,745 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 1 times [2022-11-23 02:48:26,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:48:26,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265621404] [2022-11-23 02:48:26,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:48:26,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:48:26,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:48:26,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189033319] [2022-11-23 02:48:26,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:48:26,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:48:26,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:48:26,766 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:48:26,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 02:48:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:48:26,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-23 02:48:26,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:48:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 22 proven. 22 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-23 02:48:28,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:48:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-23 02:48:32,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:48:32,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265621404] [2022-11-23 02:48:32,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:48:32,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189033319] [2022-11-23 02:48:32,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189033319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:48:32,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:48:32,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2022-11-23 02:48:32,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814037739] [2022-11-23 02:48:32,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:48:32,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-23 02:48:32,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:48:32,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-23 02:48:32,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-11-23 02:48:32,252 INFO L87 Difference]: Start difference. First operand 306 states and 420 transitions. Second operand has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-11-23 02:49:00,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 02:49:57,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:49:57,847 INFO L93 Difference]: Finished difference Result 467 states and 649 transitions. [2022-11-23 02:49:57,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-23 02:49:57,848 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 87 [2022-11-23 02:49:57,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:49:57,851 INFO L225 Difference]: With dead ends: 467 [2022-11-23 02:49:57,851 INFO L226 Difference]: Without dead ends: 463 [2022-11-23 02:49:57,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2491 ImplicationChecksByTransitivity, 65.2s TimeCoverageRelationStatistics Valid=1433, Invalid=7309, Unknown=0, NotChecked=0, Total=8742 [2022-11-23 02:49:57,855 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 305 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 2196 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 2746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 2196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.5s IncrementalHoareTripleChecker+Time [2022-11-23 02:49:57,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 666 Invalid, 2746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 2196 Invalid, 0 Unknown, 0 Unchecked, 23.5s Time] [2022-11-23 02:49:57,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-11-23 02:49:58,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 418. [2022-11-23 02:49:58,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 243 states have (on average 1.213991769547325) internal successors, (295), 244 states have internal predecessors, (295), 149 states have call successors, (149), 25 states have call predecessors, (149), 25 states have return successors, (148), 148 states have call predecessors, (148), 148 states have call successors, (148) [2022-11-23 02:49:58,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 592 transitions. [2022-11-23 02:49:58,218 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 592 transitions. Word has length 87 [2022-11-23 02:49:58,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:49:58,219 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 592 transitions. [2022-11-23 02:49:58,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-11-23 02:49:58,219 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 592 transitions. [2022-11-23 02:49:58,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-23 02:49:58,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:49:58,221 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:49:58,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 02:49:58,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 02:49:58,428 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:49:58,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:49:58,428 INFO L85 PathProgramCache]: Analyzing trace with hash -275231594, now seen corresponding path program 1 times [2022-11-23 02:49:58,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:49:58,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738890928] [2022-11-23 02:49:58,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:49:58,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:49:58,440 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:49:58,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665211845] [2022-11-23 02:49:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:49:58,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:49:58,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:49:58,442 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:49:58,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 02:49:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:49:58,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 02:49:58,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:49:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-11-23 02:49:58,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:49:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-23 02:49:59,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:49:59,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738890928] [2022-11-23 02:49:59,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:49:59,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665211845] [2022-11-23 02:49:59,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665211845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:49:59,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:49:59,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2022-11-23 02:49:59,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725797238] [2022-11-23 02:49:59,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:49:59,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 02:49:59,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:49:59,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 02:49:59,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-11-23 02:49:59,692 INFO L87 Difference]: Start difference. First operand 418 states and 592 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-23 02:50:04,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:50:04,739 INFO L93 Difference]: Finished difference Result 920 states and 1426 transitions. [2022-11-23 02:50:04,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-23 02:50:04,740 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 90 [2022-11-23 02:50:04,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:50:04,745 INFO L225 Difference]: With dead ends: 920 [2022-11-23 02:50:04,745 INFO L226 Difference]: Without dead ends: 918 [2022-11-23 02:50:04,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=392, Invalid=1414, Unknown=0, NotChecked=0, Total=1806 [2022-11-23 02:50:04,747 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 165 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-23 02:50:04,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 510 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-23 02:50:04,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-11-23 02:50:05,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 844. [2022-11-23 02:50:05,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 414 states have (on average 1.3067632850241546) internal successors, (541), 415 states have internal predecessors, (541), 401 states have call successors, (401), 28 states have call predecessors, (401), 28 states have return successors, (400), 400 states have call predecessors, (400), 400 states have call successors, (400) [2022-11-23 02:50:05,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1342 transitions. [2022-11-23 02:50:05,800 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1342 transitions. Word has length 90 [2022-11-23 02:50:05,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:50:05,801 INFO L495 AbstractCegarLoop]: Abstraction has 844 states and 1342 transitions. [2022-11-23 02:50:05,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-23 02:50:05,802 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1342 transitions. [2022-11-23 02:50:05,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-23 02:50:05,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:50:05,804 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:50:05,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 02:50:06,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 02:50:06,011 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:50:06,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:50:06,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1599365144, now seen corresponding path program 1 times [2022-11-23 02:50:06,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:50:06,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332861027] [2022-11-23 02:50:06,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:06,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:50:06,040 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:50:06,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331715499] [2022-11-23 02:50:06,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:06,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:06,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:50:06,057 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:50:06,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 02:50:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:06,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-23 02:50:06,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:50:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-11-23 02:50:07,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:50:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-11-23 02:50:09,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:50:09,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332861027] [2022-11-23 02:50:09,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:50:09,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331715499] [2022-11-23 02:50:09,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331715499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:50:09,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:50:09,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2022-11-23 02:50:09,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877078532] [2022-11-23 02:50:09,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:50:09,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-23 02:50:09,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:50:09,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-23 02:50:09,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-11-23 02:50:09,427 INFO L87 Difference]: Start difference. First operand 844 states and 1342 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 20 states have internal predecessors, (53), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-23 02:50:26,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 02:50:47,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 02:51:11,282 WARN L233 SmtUtils]: Spent 5.92s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 02:51:18,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 02:51:30,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:51:30,750 INFO L93 Difference]: Finished difference Result 1210 states and 1932 transitions. [2022-11-23 02:51:30,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-23 02:51:30,751 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 20 states have internal predecessors, (53), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 90 [2022-11-23 02:51:30,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:51:30,755 INFO L225 Difference]: With dead ends: 1210 [2022-11-23 02:51:30,755 INFO L226 Difference]: Without dead ends: 1208 [2022-11-23 02:51:30,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 46.7s TimeCoverageRelationStatistics Valid=815, Invalid=3213, Unknown=4, NotChecked=0, Total=4032 [2022-11-23 02:51:30,756 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 210 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 338 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.9s IncrementalHoareTripleChecker+Time [2022-11-23 02:51:30,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 467 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 1416 Invalid, 3 Unknown, 0 Unchecked, 34.9s Time] [2022-11-23 02:51:30,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2022-11-23 02:51:32,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1077. [2022-11-23 02:51:32,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 527 states have (on average 1.3149905123339658) internal successors, (693), 528 states have internal predecessors, (693), 517 states have call successors, (517), 32 states have call predecessors, (517), 32 states have return successors, (516), 516 states have call predecessors, (516), 516 states have call successors, (516) [2022-11-23 02:51:32,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1726 transitions. [2022-11-23 02:51:32,371 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1726 transitions. Word has length 90 [2022-11-23 02:51:32,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:51:32,371 INFO L495 AbstractCegarLoop]: Abstraction has 1077 states and 1726 transitions. [2022-11-23 02:51:32,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 20 states have internal predecessors, (53), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-23 02:51:32,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1726 transitions. [2022-11-23 02:51:32,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-23 02:51:32,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:51:32,374 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:51:32,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 02:51:32,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 02:51:32,580 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:51:32,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:51:32,581 INFO L85 PathProgramCache]: Analyzing trace with hash -577787487, now seen corresponding path program 4 times [2022-11-23 02:51:32,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:51:32,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742217503] [2022-11-23 02:51:32,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:51:32,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:51:32,590 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:51:32,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89541637] [2022-11-23 02:51:32,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:51:32,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:51:32,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:51:32,595 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:51:32,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 02:51:32,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:51:32,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:51:32,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-23 02:51:32,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:51:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 38 proven. 53 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-23 02:51:34,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:51:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 45 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-23 02:51:39,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:51:39,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742217503] [2022-11-23 02:51:39,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:51:39,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89541637] [2022-11-23 02:51:39,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89541637] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:51:39,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:51:39,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2022-11-23 02:51:39,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039162807] [2022-11-23 02:51:39,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:51:39,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 02:51:39,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:51:39,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 02:51:39,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 02:51:39,692 INFO L87 Difference]: Start difference. First operand 1077 states and 1726 transitions. Second operand has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 31 states have internal predecessors, (74), 10 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2022-11-23 02:52:02,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 02:52:26,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:52:26,871 INFO L93 Difference]: Finished difference Result 1257 states and 1979 transitions. [2022-11-23 02:52:26,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-23 02:52:26,872 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 31 states have internal predecessors, (74), 10 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) Word has length 98 [2022-11-23 02:52:26,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:52:26,879 INFO L225 Difference]: With dead ends: 1257 [2022-11-23 02:52:26,879 INFO L226 Difference]: Without dead ends: 1255 [2022-11-23 02:52:26,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=731, Invalid=3175, Unknown=0, NotChecked=0, Total=3906 [2022-11-23 02:52:26,882 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 279 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 1933 mSolverCounterSat, 362 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 2296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 1933 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.0s IncrementalHoareTripleChecker+Time [2022-11-23 02:52:26,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 403 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 1933 Invalid, 1 Unknown, 0 Unchecked, 26.0s Time] [2022-11-23 02:52:26,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2022-11-23 02:52:28,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1126. [2022-11-23 02:52:28,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 566 states have (on average 1.2968197879858658) internal successors, (734), 569 states have internal predecessors, (734), 521 states have call successors, (521), 38 states have call predecessors, (521), 38 states have return successors, (520), 518 states have call predecessors, (520), 520 states have call successors, (520) [2022-11-23 02:52:28,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1775 transitions. [2022-11-23 02:52:28,250 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1775 transitions. Word has length 98 [2022-11-23 02:52:28,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:52:28,251 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1775 transitions. [2022-11-23 02:52:28,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 31 states have internal predecessors, (74), 10 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2022-11-23 02:52:28,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1775 transitions. [2022-11-23 02:52:28,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-23 02:52:28,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:52:28,254 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:52:28,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-23 02:52:28,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 02:52:28,459 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:52:28,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:52:28,459 INFO L85 PathProgramCache]: Analyzing trace with hash 2024025072, now seen corresponding path program 2 times [2022-11-23 02:52:28,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:52:28,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580251396] [2022-11-23 02:52:28,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:52:28,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:52:28,469 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:52:28,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082643314] [2022-11-23 02:52:28,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:52:28,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:52:28,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:52:28,471 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:52:28,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 02:52:28,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:52:28,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:52:28,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-23 02:52:28,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:52:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-11-23 02:52:29,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:52:32,605 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-11-23 02:52:32,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:52:32,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580251396] [2022-11-23 02:52:32,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:52:32,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082643314] [2022-11-23 02:52:32,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082643314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:52:32,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:52:32,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2022-11-23 02:52:32,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102846625] [2022-11-23 02:52:32,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:52:32,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-23 02:52:32,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:52:32,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-23 02:52:32,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-11-23 02:52:32,609 INFO L87 Difference]: Start difference. First operand 1126 states and 1775 transitions. Second operand has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2022-11-23 02:52:43,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 02:53:42,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:53:42,938 INFO L93 Difference]: Finished difference Result 1972 states and 3119 transitions. [2022-11-23 02:53:42,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-23 02:53:42,939 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) Word has length 107 [2022-11-23 02:53:42,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:53:42,947 INFO L225 Difference]: With dead ends: 1972 [2022-11-23 02:53:42,947 INFO L226 Difference]: Without dead ends: 1429 [2022-11-23 02:53:42,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2805 ImplicationChecksByTransitivity, 49.3s TimeCoverageRelationStatistics Valid=1737, Invalid=7769, Unknown=0, NotChecked=0, Total=9506 [2022-11-23 02:53:42,952 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 341 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 2260 mSolverCounterSat, 630 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 2891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 2260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.5s IncrementalHoareTripleChecker+Time [2022-11-23 02:53:42,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 770 Invalid, 2891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 2260 Invalid, 1 Unknown, 0 Unchecked, 21.5s Time] [2022-11-23 02:53:42,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2022-11-23 02:53:44,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 1257. [2022-11-23 02:53:44,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 629 states have (on average 1.2941176470588236) internal successors, (814), 632 states have internal predecessors, (814), 585 states have call successors, (585), 42 states have call predecessors, (585), 42 states have return successors, (584), 582 states have call predecessors, (584), 584 states have call successors, (584) [2022-11-23 02:53:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 1983 transitions. [2022-11-23 02:53:44,990 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 1983 transitions. Word has length 107 [2022-11-23 02:53:44,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:53:44,991 INFO L495 AbstractCegarLoop]: Abstraction has 1257 states and 1983 transitions. [2022-11-23 02:53:44,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2022-11-23 02:53:44,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 1983 transitions. [2022-11-23 02:53:44,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-23 02:53:44,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:53:44,994 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:53:45,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 02:53:45,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:53:45,200 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:53:45,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:53:45,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1666306094, now seen corresponding path program 3 times [2022-11-23 02:53:45,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:53:45,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114465332] [2022-11-23 02:53:45,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:53:45,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:53:45,210 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:53:45,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693653814] [2022-11-23 02:53:45,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:53:45,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:53:45,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:53:45,212 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:53:45,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 02:53:45,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 02:53:45,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:53:45,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-23 02:53:45,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:53:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 47 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-11-23 02:53:46,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:53:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-11-23 02:53:51,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:53:51,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114465332] [2022-11-23 02:53:51,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:53:51,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693653814] [2022-11-23 02:53:51,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693653814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:53:51,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:53:51,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2022-11-23 02:53:51,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312172024] [2022-11-23 02:53:51,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:53:51,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-23 02:53:51,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:53:51,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-23 02:53:51,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-11-23 02:53:51,009 INFO L87 Difference]: Start difference. First operand 1257 states and 1983 transitions. Second operand has 31 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-11-23 02:53:59,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 02:54:05,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 02:54:09,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 02:54:20,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 02:54:25,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 02:54:26,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 02:54:28,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 02:54:33,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 02:54:42,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 02:54:46,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 02:54:49,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 02:55:09,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:55:09,414 INFO L93 Difference]: Finished difference Result 1729 states and 2727 transitions. [2022-11-23 02:55:09,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-23 02:55:09,415 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 112 [2022-11-23 02:55:09,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:55:09,422 INFO L225 Difference]: With dead ends: 1729 [2022-11-23 02:55:09,423 INFO L226 Difference]: Without dead ends: 1720 [2022-11-23 02:55:09,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3055 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=1817, Invalid=9313, Unknown=0, NotChecked=0, Total=11130 [2022-11-23 02:55:09,427 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 436 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 3223 mSolverCounterSat, 830 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 4061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 830 IncrementalHoareTripleChecker+Valid, 3223 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.8s IncrementalHoareTripleChecker+Time [2022-11-23 02:55:09,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 950 Invalid, 4061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [830 Valid, 3223 Invalid, 8 Unknown, 0 Unchecked, 49.8s Time] [2022-11-23 02:55:09,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2022-11-23 02:55:11,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 1398. [2022-11-23 02:55:11,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 700 states have (on average 1.2957142857142858) internal successors, (907), 702 states have internal predecessors, (907), 651 states have call successors, (651), 46 states have call predecessors, (651), 46 states have return successors, (650), 649 states have call predecessors, (650), 650 states have call successors, (650) [2022-11-23 02:55:11,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 2208 transitions. [2022-11-23 02:55:11,414 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 2208 transitions. Word has length 112 [2022-11-23 02:55:11,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:55:11,414 INFO L495 AbstractCegarLoop]: Abstraction has 1398 states and 2208 transitions. [2022-11-23 02:55:11,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-11-23 02:55:11,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 2208 transitions. [2022-11-23 02:55:11,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-23 02:55:11,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:55:11,418 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:55:11,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-23 02:55:11,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:55:11,624 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:55:11,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:55:11,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1454845263, now seen corresponding path program 2 times [2022-11-23 02:55:11,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:55:11,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114454390] [2022-11-23 02:55:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:55:11,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:55:11,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:55:11,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958552508] [2022-11-23 02:55:11,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:55:11,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:55:11,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:55:11,634 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:55:11,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-23 02:55:11,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:55:11,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:55:11,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-23 02:55:11,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:55:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 32 proven. 49 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-11-23 02:55:12,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:55:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 26 proven. 46 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2022-11-23 02:55:15,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:55:15,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114454390] [2022-11-23 02:55:15,144 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:55:15,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958552508] [2022-11-23 02:55:15,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958552508] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:55:15,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:55:15,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2022-11-23 02:55:15,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966997035] [2022-11-23 02:55:15,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:55:15,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-23 02:55:15,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:55:15,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-23 02:55:15,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-11-23 02:55:15,147 INFO L87 Difference]: Start difference. First operand 1398 states and 2208 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 27 states have internal predecessors, (67), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2022-11-23 02:55:16,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 02:55:44,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 02:56:30,848 WARN L233 SmtUtils]: Spent 6.48s on a formula simplification. DAG size of input: 99 DAG size of output: 89 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 02:57:27,556 WARN L233 SmtUtils]: Spent 12.79s on a formula simplification. DAG size of input: 100 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 02:57:30,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 02:57:43,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:57:43,710 INFO L93 Difference]: Finished difference Result 1867 states and 2940 transitions. [2022-11-23 02:57:43,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-23 02:57:43,711 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 27 states have internal predecessors, (67), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 117 [2022-11-23 02:57:43,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:57:43,719 INFO L225 Difference]: With dead ends: 1867 [2022-11-23 02:57:43,719 INFO L226 Difference]: Without dead ends: 1865 [2022-11-23 02:57:43,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2499 ImplicationChecksByTransitivity, 102.2s TimeCoverageRelationStatistics Valid=1708, Invalid=7033, Unknown=1, NotChecked=0, Total=8742 [2022-11-23 02:57:43,723 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 362 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 3216 mSolverCounterSat, 801 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 4017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 801 IncrementalHoareTripleChecker+Valid, 3216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.8s IncrementalHoareTripleChecker+Time [2022-11-23 02:57:43,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 777 Invalid, 4017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [801 Valid, 3216 Invalid, 0 Unknown, 0 Unchecked, 44.8s Time] [2022-11-23 02:57:43,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2022-11-23 02:57:46,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1711. [2022-11-23 02:57:46,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 862 states have (on average 1.3004640371229699) internal successors, (1121), 864 states have internal predecessors, (1121), 795 states have call successors, (795), 53 states have call predecessors, (795), 53 states have return successors, (794), 793 states have call predecessors, (794), 794 states have call successors, (794) [2022-11-23 02:57:46,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 2710 transitions. [2022-11-23 02:57:46,849 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 2710 transitions. Word has length 117 [2022-11-23 02:57:46,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:57:46,850 INFO L495 AbstractCegarLoop]: Abstraction has 1711 states and 2710 transitions. [2022-11-23 02:57:46,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 27 states have internal predecessors, (67), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2022-11-23 02:57:46,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 2710 transitions. [2022-11-23 02:57:46,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-23 02:57:46,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:57:46,854 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:57:46,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-23 02:57:47,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:57:47,060 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:57:47,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:57:47,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1948772218, now seen corresponding path program 3 times [2022-11-23 02:57:47,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:57:47,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861454905] [2022-11-23 02:57:47,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:57:47,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:57:47,071 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:57:47,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235403416] [2022-11-23 02:57:47,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:57:47,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:57:47,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:57:47,079 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:57:47,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-23 02:57:47,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 02:57:47,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:57:47,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-23 02:57:47,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:57:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 90 proven. 84 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2022-11-23 02:57:49,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:57:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 123 proven. 29 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-11-23 02:57:54,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:57:54,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861454905] [2022-11-23 02:57:54,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:57:54,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235403416] [2022-11-23 02:57:54,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235403416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:57:54,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:57:54,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14] total 38 [2022-11-23 02:57:54,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520161521] [2022-11-23 02:57:54,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:57:54,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-23 02:57:54,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:57:54,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-23 02:57:54,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2022-11-23 02:57:54,403 INFO L87 Difference]: Start difference. First operand 1711 states and 2710 transitions. Second operand has 38 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 32 states have internal predecessors, (81), 14 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2022-11-23 02:58:21,592 WARN L233 SmtUtils]: Spent 5.00s on a formula simplification. DAG size of input: 79 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 02:58:27,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 02:58:59,181 WARN L233 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 71 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 02:59:23,723 WARN L233 SmtUtils]: Spent 9.89s on a formula simplification. DAG size of input: 84 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:00:07,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:00:07,681 INFO L93 Difference]: Finished difference Result 1901 states and 2976 transitions. [2022-11-23 03:00:07,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-23 03:00:07,682 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 32 states have internal predecessors, (81), 14 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) Word has length 125 [2022-11-23 03:00:07,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:00:07,694 INFO L225 Difference]: With dead ends: 1901 [2022-11-23 03:00:07,694 INFO L226 Difference]: Without dead ends: 1899 [2022-11-23 03:00:07,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3593 ImplicationChecksByTransitivity, 94.8s TimeCoverageRelationStatistics Valid=1906, Invalid=10976, Unknown=0, NotChecked=0, Total=12882 [2022-11-23 03:00:07,698 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 413 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 4088 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 4680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 4088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.8s IncrementalHoareTripleChecker+Time [2022-11-23 03:00:07,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 698 Invalid, 4680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 4088 Invalid, 0 Unknown, 0 Unchecked, 38.8s Time] [2022-11-23 03:00:07,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2022-11-23 03:00:11,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1864. [2022-11-23 03:00:11,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 949 states have (on average 1.2939936775553214) internal successors, (1228), 953 states have internal predecessors, (1228), 855 states have call successors, (855), 59 states have call predecessors, (855), 59 states have return successors, (854), 851 states have call predecessors, (854), 854 states have call successors, (854) [2022-11-23 03:00:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 2937 transitions. [2022-11-23 03:00:11,358 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 2937 transitions. Word has length 125 [2022-11-23 03:00:11,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:00:11,358 INFO L495 AbstractCegarLoop]: Abstraction has 1864 states and 2937 transitions. [2022-11-23 03:00:11,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 32 states have internal predecessors, (81), 14 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2022-11-23 03:00:11,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 2937 transitions. [2022-11-23 03:00:11,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-23 03:00:11,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:00:11,363 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:00:11,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-23 03:00:11,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-23 03:00:11,569 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:00:11,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:00:11,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1192369783, now seen corresponding path program 4 times [2022-11-23 03:00:11,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:00:11,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107067699] [2022-11-23 03:00:11,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:00:11,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:00:11,591 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 03:00:11,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363848025] [2022-11-23 03:00:11,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:00:11,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:00:11,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:00:11,593 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:00:11,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e90b8df-24f8-4561-a695-7d00e185ab8e/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-23 03:00:11,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:00:11,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:00:11,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-23 03:00:11,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:00:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 76 proven. 66 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2022-11-23 03:00:13,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:00:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 70 proven. 63 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-11-23 03:00:20,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:00:20,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107067699] [2022-11-23 03:00:20,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 03:00:20,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363848025] [2022-11-23 03:00:20,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363848025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:00:20,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:00:20,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 38 [2022-11-23 03:00:20,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109125440] [2022-11-23 03:00:20,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:00:20,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-23 03:00:20,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:00:20,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-23 03:00:20,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1202, Unknown=0, NotChecked=0, Total=1406 [2022-11-23 03:00:20,884 INFO L87 Difference]: Start difference. First operand 1864 states and 2937 transitions. Second operand has 38 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2022-11-23 03:00:45,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 03:00:47,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 03:01:00,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 03:01:08,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 03:01:21,356 WARN L233 SmtUtils]: Spent 5.28s on a formula simplification that was a NOOP. DAG size: 106 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:01:27,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 03:01:47,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 03:01:56,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []