./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8 --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 b0dc7e6cdf006545b97e616af165994b39a2e54c024b52d6607380c5e84ee914 --- 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-2329fc7 [2022-12-13 13:59:15,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:59:15,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:59:15,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:59:15,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:59:15,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:59:15,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:59:15,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:59:15,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:59:15,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:59:15,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:59:15,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:59:15,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:59:15,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:59:15,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:59:15,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:59:15,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:59:15,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:59:15,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:59:15,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:59:15,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:59:15,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:59:15,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:59:15,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:59:15,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:59:15,571 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:59:15,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:59:15,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:59:15,573 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:59:15,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:59:15,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:59:15,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:59:15,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:59:15,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:59:15,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:59:15,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:59:15,576 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:59:15,577 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:59:15,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:59:15,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:59:15,578 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:59:15,578 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 13:59:15,594 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:59:15,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:59:15,594 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:59:15,594 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:59:15,595 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:59:15,595 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:59:15,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:59:15,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:59:15,596 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:59:15,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:59:15,596 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:59:15,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:59:15,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:59:15,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:59:15,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 13:59:15,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:59:15,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 13:59:15,597 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:59:15,597 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 13:59:15,597 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:59:15,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 13:59:15,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:59:15,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:59:15,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:59:15,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:59:15,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:59:15,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:59:15,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 13:59:15,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:59:15,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:59:15,598 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:59:15,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 13:59:15,598 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:59:15,599 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:59:15,599 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:59:15,599 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_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0dc7e6cdf006545b97e616af165994b39a2e54c024b52d6607380c5e84ee914 [2022-12-13 13:59:15,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:59:15,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:59:15,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:59:15,781 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:59:15,782 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:59:15,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c [2022-12-13 13:59:18,295 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:59:18,441 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:59:18,442 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c [2022-12-13 13:59:18,446 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/data/1aad7bfa3/3281b45a5f5f459f816f3423ce95870a/FLAGba4219de8 [2022-12-13 13:59:18,869 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/data/1aad7bfa3/3281b45a5f5f459f816f3423ce95870a [2022-12-13 13:59:18,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:59:18,872 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:59:18,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:59:18,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:59:18,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:59:18,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:59:18" (1/1) ... [2022-12-13 13:59:18,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ae6a5cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:59:18, skipping insertion in model container [2022-12-13 13:59:18,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:59:18" (1/1) ... [2022-12-13 13:59:18,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:59:18,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:59:18,992 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_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c[526,539] [2022-12-13 13:59:19,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:59:19,011 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:59:19,019 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_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c[526,539] [2022-12-13 13:59:19,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:59:19,033 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:59:19,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:59:19 WrapperNode [2022-12-13 13:59:19,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:59:19,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:59:19,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:59:19,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:59:19,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:59:19" (1/1) ... [2022-12-13 13:59:19,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:59:19" (1/1) ... [2022-12-13 13:59:19,057 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2022-12-13 13:59:19,057 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:59:19,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:59:19,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:59:19,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:59:19,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:59:19" (1/1) ... [2022-12-13 13:59:19,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:59:19" (1/1) ... [2022-12-13 13:59:19,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:59:19" (1/1) ... [2022-12-13 13:59:19,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:59:19" (1/1) ... [2022-12-13 13:59:19,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:59:19" (1/1) ... [2022-12-13 13:59:19,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:59:19" (1/1) ... [2022-12-13 13:59:19,071 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:59:19" (1/1) ... [2022-12-13 13:59:19,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:59:19" (1/1) ... [2022-12-13 13:59:19,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:59:19,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:59:19,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:59:19,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:59:19,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:59:19" (1/1) ... [2022-12-13 13:59:19,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:59:19,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:59:19,096 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:59:19,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:59:19,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:59:19,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:59:19,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:59:19,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:59:19,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 13:59:19,123 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 13:59:19,172 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:59:19,174 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:59:19,264 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:59:19,268 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:59:19,268 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 13:59:19,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:59:19 BoogieIcfgContainer [2022-12-13 13:59:19,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:59:19,271 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:59:19,271 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:59:19,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:59:19,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:59:18" (1/3) ... [2022-12-13 13:59:19,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff818aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:59:19, skipping insertion in model container [2022-12-13 13:59:19,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:59:19" (2/3) ... [2022-12-13 13:59:19,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff818aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:59:19, skipping insertion in model container [2022-12-13 13:59:19,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:59:19" (3/3) ... [2022-12-13 13:59:19,276 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound20.c [2022-12-13 13:59:19,290 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:59:19,290 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 13:59:19,323 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:59:19,328 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;@16e731ea, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:59:19,328 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 13:59:19,331 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 13:59:19,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 13:59:19,337 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:59:19,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:59:19,337 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:59:19,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:59:19,341 INFO L85 PathProgramCache]: Analyzing trace with hash 643118537, now seen corresponding path program 1 times [2022-12-13 13:59:19,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:59:19,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148035473] [2022-12-13 13:59:19,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:19,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:59:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:19,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:59:19,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148035473] [2022-12-13 13:59:19,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-13 13:59:19,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425541701] [2022-12-13 13:59:19,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:19,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:59:19,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:59:19,432 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:59:19,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 13:59:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:19,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 13:59:19,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:59:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:59:19,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:59:19,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425541701] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:59:19,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:59:19,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:59:19,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906697728] [2022-12-13 13:59:19,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:59:19,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 13:59:19,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:59:19,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 13:59:19,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 13:59:19,530 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:19,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:59:19,546 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2022-12-13 13:59:19,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 13:59:19,548 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 13:59:19,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:59:19,553 INFO L225 Difference]: With dead ends: 50 [2022-12-13 13:59:19,553 INFO L226 Difference]: Without dead ends: 22 [2022-12-13 13:59:19,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 13:59:19,558 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:59:19,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:59:19,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-13 13:59:19,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-13 13:59:19,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 13:59:19,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2022-12-13 13:59:19,587 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2022-12-13 13:59:19,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:59:19,587 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2022-12-13 13:59:19,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:19,588 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2022-12-13 13:59:19,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 13:59:19,588 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:59:19,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:59:19,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:59:19,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-13 13:59:19,791 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:59:19,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:59:19,793 INFO L85 PathProgramCache]: Analyzing trace with hash 181060127, now seen corresponding path program 1 times [2022-12-13 13:59:19,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:59:19,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725741115] [2022-12-13 13:59:19,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:19,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:59:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:19,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:59:19,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:59:19,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725741115] [2022-12-13 13:59:19,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725741115] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:59:19,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:59:19,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:59:19,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001323053] [2022-12-13 13:59:19,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:59:19,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:59:19,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:59:19,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:59:19,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:59:19,952 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:19,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:59:19,998 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2022-12-13 13:59:19,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:59:19,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 13:59:19,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:59:19,999 INFO L225 Difference]: With dead ends: 36 [2022-12-13 13:59:20,000 INFO L226 Difference]: Without dead ends: 34 [2022-12-13 13:59:20,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:59:20,001 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:59:20,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 99 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:59:20,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-13 13:59:20,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2022-12-13 13:59:20,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 13:59:20,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2022-12-13 13:59:20,012 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2022-12-13 13:59:20,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:59:20,012 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-12-13 13:59:20,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:20,012 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2022-12-13 13:59:20,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 13:59:20,013 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:59:20,013 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:59:20,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 13:59:20,013 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:59:20,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:59:20,014 INFO L85 PathProgramCache]: Analyzing trace with hash -712280900, now seen corresponding path program 1 times [2022-12-13 13:59:20,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:59:20,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731321892] [2022-12-13 13:59:20,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:20,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:59:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:20,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:59:20,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731321892] [2022-12-13 13:59:20,035 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-13 13:59:20,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112543590] [2022-12-13 13:59:20,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:20,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:59:20,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:59:20,037 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:59:20,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 13:59:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:20,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:59:20,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:59:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:59:20,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:59:20,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112543590] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:59:20,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:59:20,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:59:20,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712044388] [2022-12-13 13:59:20,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:59:20,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:59:20,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:59:20,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:59:20,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:59:20,118 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:59:20,132 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2022-12-13 13:59:20,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:59:20,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 13:59:20,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:59:20,134 INFO L225 Difference]: With dead ends: 42 [2022-12-13 13:59:20,134 INFO L226 Difference]: Without dead ends: 28 [2022-12-13 13:59:20,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:59:20,135 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:59:20,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:59:20,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-13 13:59:20,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-12-13 13:59:20,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 13:59:20,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-12-13 13:59:20,141 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2022-12-13 13:59:20,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:59:20,141 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-12-13 13:59:20,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:20,142 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-12-13 13:59:20,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 13:59:20,142 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:59:20,142 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:59:20,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 13:59:20,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-13 13:59:20,344 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:59:20,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:59:20,346 INFO L85 PathProgramCache]: Analyzing trace with hash 2036073049, now seen corresponding path program 1 times [2022-12-13 13:59:20,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:59:20,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840359842] [2022-12-13 13:59:20,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:20,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:59:20,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:20,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 13:59:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:59:20,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:59:20,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840359842] [2022-12-13 13:59:20,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840359842] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:59:20,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:59:20,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:59:20,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000035105] [2022-12-13 13:59:20,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:59:20,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:59:20,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:59:20,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:59:20,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:59:20,496 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:59:20,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:59:20,533 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2022-12-13 13:59:20,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:59:20,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-12-13 13:59:20,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:59:20,534 INFO L225 Difference]: With dead ends: 42 [2022-12-13 13:59:20,534 INFO L226 Difference]: Without dead ends: 40 [2022-12-13 13:59:20,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:59:20,535 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:59:20,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 95 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:59:20,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-13 13:59:20,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-12-13 13:59:20,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 13:59:20,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-12-13 13:59:20,541 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2022-12-13 13:59:20,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:59:20,541 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-12-13 13:59:20,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:59:20,541 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-12-13 13:59:20,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 13:59:20,542 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:59:20,542 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:59:20,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 13:59:20,543 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:59:20,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:59:20,543 INFO L85 PathProgramCache]: Analyzing trace with hash 380169759, now seen corresponding path program 1 times [2022-12-13 13:59:20,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:59:20,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717678863] [2022-12-13 13:59:20,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:20,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:59:20,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 13:59:20,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10783983] [2022-12-13 13:59:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:20,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:59:20,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:59:20,554 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:59:20,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 13:59:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:20,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 13:59:20,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:59:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:59:20,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:59:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:59:20,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:59:20,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717678863] [2022-12-13 13:59:20,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 13:59:20,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10783983] [2022-12-13 13:59:20,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10783983] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:59:20,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:59:20,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-12-13 13:59:20,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024970682] [2022-12-13 13:59:20,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:59:20,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:59:20,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:59:20,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:59:20,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:59:20,792 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 13:59:23,014 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 [] [2022-12-13 13:59:25,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 13:59:27,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 13:59:27,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:59:27,132 INFO L93 Difference]: Finished difference Result 71 states and 96 transitions. [2022-12-13 13:59:27,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 13:59:27,132 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 18 [2022-12-13 13:59:27,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:59:27,134 INFO L225 Difference]: With dead ends: 71 [2022-12-13 13:59:27,134 INFO L226 Difference]: Without dead ends: 56 [2022-12-13 13:59:27,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-12-13 13:59:27,136 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 34 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-12-13 13:59:27,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 79 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 145 Invalid, 3 Unknown, 0 Unchecked, 6.3s Time] [2022-12-13 13:59:27,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-13 13:59:27,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-12-13 13:59:27,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 36 states have internal predecessors, (42), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-13 13:59:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2022-12-13 13:59:27,149 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 18 [2022-12-13 13:59:27,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:59:27,149 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2022-12-13 13:59:27,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 13:59:27,149 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2022-12-13 13:59:27,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 13:59:27,150 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:59:27,150 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:59:27,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 13:59:27,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:59:27,351 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:59:27,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:59:27,352 INFO L85 PathProgramCache]: Analyzing trace with hash -461064832, now seen corresponding path program 1 times [2022-12-13 13:59:27,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:59:27,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310697773] [2022-12-13 13:59:27,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:27,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:59:27,367 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 13:59:27,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1913941099] [2022-12-13 13:59:27,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:27,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:59:27,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:59:27,369 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:59:27,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 13:59:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:27,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 13:59:27,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:59:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:59:27,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:59:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:59:27,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:59:27,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310697773] [2022-12-13 13:59:27,612 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 13:59:27,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913941099] [2022-12-13 13:59:27,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913941099] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:59:27,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:59:27,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-12-13 13:59:27,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947518786] [2022-12-13 13:59:27,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:59:27,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 13:59:27,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:59:27,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 13:59:27,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-13 13:59:27,614 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-13 13:59:27,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:59:27,758 INFO L93 Difference]: Finished difference Result 73 states and 97 transitions. [2022-12-13 13:59:27,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 13:59:27,758 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 26 [2022-12-13 13:59:27,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:59:27,759 INFO L225 Difference]: With dead ends: 73 [2022-12-13 13:59:27,760 INFO L226 Difference]: Without dead ends: 65 [2022-12-13 13:59:27,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-12-13 13:59:27,760 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:59:27,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 71 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:59:27,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-13 13:59:27,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2022-12-13 13:59:27,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 43 states have internal predecessors, (50), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-13 13:59:27,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2022-12-13 13:59:27,769 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 26 [2022-12-13 13:59:27,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:59:27,769 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2022-12-13 13:59:27,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-13 13:59:27,770 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2022-12-13 13:59:27,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 13:59:27,770 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:59:27,770 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:59:27,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 13:59:27,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:59:27,972 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:59:27,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:59:27,974 INFO L85 PathProgramCache]: Analyzing trace with hash 847666457, now seen corresponding path program 1 times [2022-12-13 13:59:27,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:59:27,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237910807] [2022-12-13 13:59:27,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:27,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:59:28,002 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 13:59:28,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199073383] [2022-12-13 13:59:28,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:28,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:59:28,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:59:28,007 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:59:28,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 13:59:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:28,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 13:59:28,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:59:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-13 13:59:28,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:59:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 13:59:28,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:59:28,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237910807] [2022-12-13 13:59:28,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 13:59:28,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199073383] [2022-12-13 13:59:28,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199073383] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:59:28,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:59:28,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-12-13 13:59:28,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949807654] [2022-12-13 13:59:28,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:59:28,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:59:28,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:59:28,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:59:28,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:59:28,211 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-13 13:59:28,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:59:28,289 INFO L93 Difference]: Finished difference Result 165 states and 205 transitions. [2022-12-13 13:59:28,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 13:59:28,289 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 33 [2022-12-13 13:59:28,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:59:28,290 INFO L225 Difference]: With dead ends: 165 [2022-12-13 13:59:28,290 INFO L226 Difference]: Without dead ends: 127 [2022-12-13 13:59:28,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-13 13:59:28,291 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 34 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:59:28,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 137 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:59:28,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-12-13 13:59:28,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2022-12-13 13:59:28,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 83 states have internal predecessors, (94), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-13 13:59:28,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2022-12-13 13:59:28,305 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 33 [2022-12-13 13:59:28,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:59:28,305 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2022-12-13 13:59:28,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-13 13:59:28,305 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2022-12-13 13:59:28,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 13:59:28,306 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:59:28,306 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:59:28,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 13:59:28,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:59:28,507 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:59:28,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:59:28,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1605675221, now seen corresponding path program 1 times [2022-12-13 13:59:28,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:59:28,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950285673] [2022-12-13 13:59:28,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:28,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:59:28,517 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 13:59:28,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137423862] [2022-12-13 13:59:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:28,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:59:28,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:59:28,519 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:59:28,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 13:59:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:28,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 13:59:28,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:59:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-13 13:59:28,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:59:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-12-13 13:59:28,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:59:28,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950285673] [2022-12-13 13:59:28,890 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 13:59:28,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137423862] [2022-12-13 13:59:28,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137423862] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:59:28,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:59:28,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-12-13 13:59:28,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987835497] [2022-12-13 13:59:28,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:59:28,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 13:59:28,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:59:28,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 13:59:28,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:59:28,893 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-12-13 13:59:29,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:59:29,032 INFO L93 Difference]: Finished difference Result 249 states and 307 transitions. [2022-12-13 13:59:29,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 13:59:29,033 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2022-12-13 13:59:29,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:59:29,034 INFO L225 Difference]: With dead ends: 249 [2022-12-13 13:59:29,035 INFO L226 Difference]: Without dead ends: 228 [2022-12-13 13:59:29,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-12-13 13:59:29,036 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 80 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:59:29,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 261 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:59:29,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-12-13 13:59:29,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 221. [2022-12-13 13:59:29,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 144 states have (on average 1.1944444444444444) internal successors, (172), 155 states have internal predecessors, (172), 51 states have call successors, (51), 26 states have call predecessors, (51), 25 states have return successors, (47), 39 states have call predecessors, (47), 47 states have call successors, (47) [2022-12-13 13:59:29,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 270 transitions. [2022-12-13 13:59:29,068 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 270 transitions. Word has length 49 [2022-12-13 13:59:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:59:29,068 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 270 transitions. [2022-12-13 13:59:29,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-12-13 13:59:29,068 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 270 transitions. [2022-12-13 13:59:29,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 13:59:29,070 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:59:29,070 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:59:29,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 13:59:29,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 13:59:29,271 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:59:29,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:59:29,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1800695307, now seen corresponding path program 1 times [2022-12-13 13:59:29,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:59:29,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259852892] [2022-12-13 13:59:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:29,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:59:29,293 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 13:59:29,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401752872] [2022-12-13 13:59:29,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:29,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:59:29,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:59:29,297 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:59:29,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 13:59:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:29,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 13:59:29,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:59:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-13 13:59:29,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:59:30,749 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-13 13:59:30,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:59:30,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259852892] [2022-12-13 13:59:30,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 13:59:30,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401752872] [2022-12-13 13:59:30,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401752872] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:59:30,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:59:30,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-12-13 13:59:30,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167094589] [2022-12-13 13:59:30,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:59:30,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 13:59:30,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:59:30,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 13:59:30,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-12-13 13:59:30,751 INFO L87 Difference]: Start difference. First operand 221 states and 270 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-13 13:59:36,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 13:59:38,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 13:59:39,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:59:39,361 INFO L93 Difference]: Finished difference Result 372 states and 479 transitions. [2022-12-13 13:59:39,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 13:59:39,362 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 58 [2022-12-13 13:59:39,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:59:39,364 INFO L225 Difference]: With dead ends: 372 [2022-12-13 13:59:39,364 INFO L226 Difference]: Without dead ends: 299 [2022-12-13 13:59:39,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-12-13 13:59:39,365 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 60 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 94 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-12-13 13:59:39,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 147 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 407 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-12-13 13:59:39,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-12-13 13:59:39,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 272. [2022-12-13 13:59:39,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 186 states have (on average 1.2258064516129032) internal successors, (228), 194 states have internal predecessors, (228), 56 states have call successors, (56), 29 states have call predecessors, (56), 29 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2022-12-13 13:59:39,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 338 transitions. [2022-12-13 13:59:39,435 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 338 transitions. Word has length 58 [2022-12-13 13:59:39,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:59:39,436 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 338 transitions. [2022-12-13 13:59:39,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-13 13:59:39,436 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 338 transitions. [2022-12-13 13:59:39,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-13 13:59:39,437 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:59:39,437 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:59:39,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 13:59:39,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:59:39,639 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:59:39,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:59:39,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1688778742, now seen corresponding path program 1 times [2022-12-13 13:59:39,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:59:39,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104634380] [2022-12-13 13:59:39,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:39,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:59:39,663 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 13:59:39,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888396765] [2022-12-13 13:59:39,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:39,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:59:39,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:59:39,667 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:59:39,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 13:59:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:39,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 13:59:39,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:59:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-13 13:59:39,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:59:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-13 13:59:40,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:59:40,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104634380] [2022-12-13 13:59:40,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 13:59:40,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888396765] [2022-12-13 13:59:40,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888396765] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:59:40,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:59:40,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-12-13 13:59:40,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526772475] [2022-12-13 13:59:40,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:59:40,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 13:59:40,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:59:40,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 13:59:40,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-12-13 13:59:40,368 INFO L87 Difference]: Start difference. First operand 272 states and 338 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-12-13 13:59:41,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:59:41,080 INFO L93 Difference]: Finished difference Result 341 states and 423 transitions. [2022-12-13 13:59:41,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 13:59:41,081 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 69 [2022-12-13 13:59:41,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:59:41,083 INFO L225 Difference]: With dead ends: 341 [2022-12-13 13:59:41,083 INFO L226 Difference]: Without dead ends: 260 [2022-12-13 13:59:41,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-12-13 13:59:41,085 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 39 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 13:59:41,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 122 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 13:59:41,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-12-13 13:59:41,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 236. [2022-12-13 13:59:41,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 161 states have (on average 1.1801242236024845) internal successors, (190), 165 states have internal predecessors, (190), 46 states have call successors, (46), 29 states have call predecessors, (46), 28 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2022-12-13 13:59:41,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 280 transitions. [2022-12-13 13:59:41,120 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 280 transitions. Word has length 69 [2022-12-13 13:59:41,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:59:41,120 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 280 transitions. [2022-12-13 13:59:41,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-12-13 13:59:41,120 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 280 transitions. [2022-12-13 13:59:41,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-13 13:59:41,121 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:59:41,121 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:59:41,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 13:59:41,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 13:59:41,324 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:59:41,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:59:41,325 INFO L85 PathProgramCache]: Analyzing trace with hash -428937714, now seen corresponding path program 1 times [2022-12-13 13:59:41,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:59:41,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275219370] [2022-12-13 13:59:41,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:41,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:59:41,346 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 13:59:41,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [79458749] [2022-12-13 13:59:41,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:41,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:59:41,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:59:41,350 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:59:41,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 13:59:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:41,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 13:59:41,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:59:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-13 13:59:41,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:59:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-13 13:59:41,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:59:41,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275219370] [2022-12-13 13:59:41,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 13:59:41,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79458749] [2022-12-13 13:59:41,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79458749] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:59:41,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:59:41,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-12-13 13:59:41,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554704515] [2022-12-13 13:59:41,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:59:41,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 13:59:41,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:59:41,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 13:59:41,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-12-13 13:59:41,803 INFO L87 Difference]: Start difference. First operand 236 states and 280 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-12-13 13:59:42,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:59:42,108 INFO L93 Difference]: Finished difference Result 260 states and 307 transitions. [2022-12-13 13:59:42,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 13:59:42,109 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 74 [2022-12-13 13:59:42,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:59:42,110 INFO L225 Difference]: With dead ends: 260 [2022-12-13 13:59:42,110 INFO L226 Difference]: Without dead ends: 215 [2022-12-13 13:59:42,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-12-13 13:59:42,110 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 28 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:59:42,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 122 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 13:59:42,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-12-13 13:59:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2022-12-13 13:59:42,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 143 states have (on average 1.1468531468531469) internal successors, (164), 148 states have internal predecessors, (164), 41 states have call successors, (41), 25 states have call predecessors, (41), 25 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2022-12-13 13:59:42,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 244 transitions. [2022-12-13 13:59:42,140 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 244 transitions. Word has length 74 [2022-12-13 13:59:42,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:59:42,140 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 244 transitions. [2022-12-13 13:59:42,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-12-13 13:59:42,141 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 244 transitions. [2022-12-13 13:59:42,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-13 13:59:42,141 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:59:42,141 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 13:59:42,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 13:59:42,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 13:59:42,342 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:59:42,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:59:42,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1611798954, now seen corresponding path program 2 times [2022-12-13 13:59:42,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:59:42,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817560389] [2022-12-13 13:59:42,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:42,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:59:42,371 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 13:59:42,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049266726] [2022-12-13 13:59:42,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:59:42,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:59:42,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:59:42,376 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:59:42,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 13:59:42,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:59:42,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:59:42,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 13:59:42,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:59:42,790 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-12-13 13:59:42,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:00:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-12-13 14:00:17,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:00:17,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817560389] [2022-12-13 14:00:17,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:00:17,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049266726] [2022-12-13 14:00:17,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049266726] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:00:17,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:00:17,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2022-12-13 14:00:17,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117214540] [2022-12-13 14:00:17,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:00:17,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 14:00:17,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:00:17,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 14:00:17,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=335, Unknown=3, NotChecked=0, Total=420 [2022-12-13 14:00:17,873 INFO L87 Difference]: Start difference. First operand 210 states and 244 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-12-13 14:00:37,424 WARN L233 SmtUtils]: Spent 18.85s on a formula simplification. DAG size of input: 172 DAG size of output: 104 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:00:39,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:00:41,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:00:50,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:00:50,780 INFO L93 Difference]: Finished difference Result 306 states and 390 transitions. [2022-12-13 14:00:50,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 14:00:50,781 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 90 [2022-12-13 14:00:50,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:00:50,783 INFO L225 Difference]: With dead ends: 306 [2022-12-13 14:00:50,783 INFO L226 Difference]: Without dead ends: 262 [2022-12-13 14:00:50,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=151, Invalid=548, Unknown=3, NotChecked=0, Total=702 [2022-12-13 14:00:50,784 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 98 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:00:50,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 347 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-12-13 14:00:50,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-12-13 14:00:50,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 247. [2022-12-13 14:00:50,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 166 states have (on average 1.1987951807228916) internal successors, (199), 175 states have internal predecessors, (199), 54 states have call successors, (54), 26 states have call predecessors, (54), 26 states have return successors, (52), 45 states have call predecessors, (52), 52 states have call successors, (52) [2022-12-13 14:00:50,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 305 transitions. [2022-12-13 14:00:50,850 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 305 transitions. Word has length 90 [2022-12-13 14:00:50,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:00:50,851 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 305 transitions. [2022-12-13 14:00:50,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-12-13 14:00:50,851 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 305 transitions. [2022-12-13 14:00:50,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-13 14:00:50,852 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:00:50,852 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:00:50,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 14:00:51,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 14:00:51,053 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:00:51,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:51,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1991126182, now seen corresponding path program 1 times [2022-12-13 14:00:51,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:00:51,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910994934] [2022-12-13 14:00:51,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:00:51,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:00:51,068 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:00:51,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118074199] [2022-12-13 14:00:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:00:51,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:00:51,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:00:51,069 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:00:51,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 14:00:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:00:51,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 14:00:51,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:00:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-13 14:00:51,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:00:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-12-13 14:00:51,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:00:51,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910994934] [2022-12-13 14:00:51,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:00:51,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118074199] [2022-12-13 14:00:51,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118074199] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:00:51,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:00:51,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-12-13 14:00:51,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254363730] [2022-12-13 14:00:51,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:00:51,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 14:00:51,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:00:51,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 14:00:51,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-12-13 14:00:51,262 INFO L87 Difference]: Start difference. First operand 247 states and 305 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-12-13 14:00:51,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:00:51,641 INFO L93 Difference]: Finished difference Result 707 states and 937 transitions. [2022-12-13 14:00:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 14:00:51,641 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 96 [2022-12-13 14:00:51,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:00:51,643 INFO L225 Difference]: With dead ends: 707 [2022-12-13 14:00:51,643 INFO L226 Difference]: Without dead ends: 629 [2022-12-13 14:00:51,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-12-13 14:00:51,644 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 158 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:00:51,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 293 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:00:51,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-12-13 14:00:51,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 549. [2022-12-13 14:00:51,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 362 states have (on average 1.270718232044199) internal successors, (460), 391 states have internal predecessors, (460), 134 states have call successors, (134), 53 states have call predecessors, (134), 52 states have return successors, (127), 104 states have call predecessors, (127), 127 states have call successors, (127) [2022-12-13 14:00:51,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 721 transitions. [2022-12-13 14:00:51,836 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 721 transitions. Word has length 96 [2022-12-13 14:00:51,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:00:51,836 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 721 transitions. [2022-12-13 14:00:51,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-12-13 14:00:51,836 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 721 transitions. [2022-12-13 14:00:51,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-13 14:00:51,837 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:00:51,837 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:00:51,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 14:00:52,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 14:00:52,038 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:00:52,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:52,040 INFO L85 PathProgramCache]: Analyzing trace with hash -218084043, now seen corresponding path program 2 times [2022-12-13 14:00:52,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:00:52,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128229496] [2022-12-13 14:00:52,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:00:52,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:00:52,061 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:00:52,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85644095] [2022-12-13 14:00:52,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:00:52,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:00:52,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:00:52,065 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:00:52,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 14:00:52,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:00:52,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:00:52,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 14:00:52,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:00:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-12-13 14:00:52,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:00:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-12-13 14:00:59,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:00:59,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128229496] [2022-12-13 14:00:59,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:00:59,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85644095] [2022-12-13 14:00:59,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85644095] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:00:59,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:00:59,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2022-12-13 14:00:59,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7899165] [2022-12-13 14:00:59,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:00:59,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 14:00:59,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:00:59,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 14:00:59,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-12-13 14:00:59,558 INFO L87 Difference]: Start difference. First operand 549 states and 721 transitions. Second operand has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2022-12-13 14:01:03,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:01:14,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:01:18,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:01:23,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:01:23,188 INFO L93 Difference]: Finished difference Result 684 states and 896 transitions. [2022-12-13 14:01:23,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 14:01:23,189 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 101 [2022-12-13 14:01:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:01:23,190 INFO L225 Difference]: With dead ends: 684 [2022-12-13 14:01:23,190 INFO L226 Difference]: Without dead ends: 523 [2022-12-13 14:01:23,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 179 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2022-12-13 14:01:23,191 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 60 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 88 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-12-13 14:01:23,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 241 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 816 Invalid, 2 Unknown, 0 Unchecked, 10.7s Time] [2022-12-13 14:01:23,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-12-13 14:01:23,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 500. [2022-12-13 14:01:23,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 329 states have (on average 1.2188449848024316) internal successors, (401), 355 states have internal predecessors, (401), 117 states have call successors, (117), 53 states have call predecessors, (117), 53 states have return successors, (111), 91 states have call predecessors, (111), 111 states have call successors, (111) [2022-12-13 14:01:23,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 629 transitions. [2022-12-13 14:01:23,379 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 629 transitions. Word has length 101 [2022-12-13 14:01:23,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:01:23,379 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 629 transitions. [2022-12-13 14:01:23,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2022-12-13 14:01:23,379 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 629 transitions. [2022-12-13 14:01:23,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-13 14:01:23,380 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:01:23,380 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:23,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 14:01:23,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:01:23,581 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:01:23,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:23,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1246855822, now seen corresponding path program 1 times [2022-12-13 14:01:23,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:01:23,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905213236] [2022-12-13 14:01:23,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:01:23,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:01:23,587 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:01:23,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708360991] [2022-12-13 14:01:23,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:01:23,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:01:23,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:01:23,588 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:01:23,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 14:01:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:01:23,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 14:01:23,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:01:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-13 14:01:23,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:01:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-12-13 14:01:23,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:01:23,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905213236] [2022-12-13 14:01:23,839 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:01:23,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708360991] [2022-12-13 14:01:23,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708360991] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:01:23,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:01:23,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-12-13 14:01:23,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745559765] [2022-12-13 14:01:23,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:01:23,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 14:01:23,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:01:23,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 14:01:23,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-12-13 14:01:23,841 INFO L87 Difference]: Start difference. First operand 500 states and 629 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2022-12-13 14:01:24,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:01:24,485 INFO L93 Difference]: Finished difference Result 933 states and 1215 transitions. [2022-12-13 14:01:24,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 14:01:24,486 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) Word has length 104 [2022-12-13 14:01:24,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:01:24,488 INFO L225 Difference]: With dead ends: 933 [2022-12-13 14:01:24,488 INFO L226 Difference]: Without dead ends: 896 [2022-12-13 14:01:24,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2022-12-13 14:01:24,489 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 216 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 14:01:24,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 482 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 14:01:24,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-12-13 14:01:24,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 881. [2022-12-13 14:01:24,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 588 states have (on average 1.1479591836734695) internal successors, (675), 628 states have internal predecessors, (675), 211 states have call successors, (211), 82 states have call predecessors, (211), 81 states have return successors, (202), 170 states have call predecessors, (202), 202 states have call successors, (202) [2022-12-13 14:01:24,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1088 transitions. [2022-12-13 14:01:24,792 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1088 transitions. Word has length 104 [2022-12-13 14:01:24,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:01:24,793 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 1088 transitions. [2022-12-13 14:01:24,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2022-12-13 14:01:24,793 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1088 transitions. [2022-12-13 14:01:24,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-12-13 14:01:24,794 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:01:24,794 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:24,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 14:01:24,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 14:01:24,995 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:01:24,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:24,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1649720214, now seen corresponding path program 1 times [2022-12-13 14:01:24,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:01:24,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504990052] [2022-12-13 14:01:24,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:01:24,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:01:25,018 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:01:25,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150243112] [2022-12-13 14:01:25,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:01:25,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:01:25,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:01:25,022 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:01:25,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 14:01:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:01:25,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:01:25,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:01:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 299 proven. 0 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2022-12-13 14:01:25,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:01:25,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:01:25,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504990052] [2022-12-13 14:01:25,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:01:25,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150243112] [2022-12-13 14:01:25,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150243112] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:01:25,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:01:25,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 14:01:25,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313927962] [2022-12-13 14:01:25,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:01:25,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:01:25,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:01:25,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:01:25,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:01:25,199 INFO L87 Difference]: Start difference. First operand 881 states and 1088 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-13 14:01:25,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:01:25,752 INFO L93 Difference]: Finished difference Result 1185 states and 1447 transitions. [2022-12-13 14:01:25,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 14:01:25,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 119 [2022-12-13 14:01:25,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:01:25,755 INFO L225 Difference]: With dead ends: 1185 [2022-12-13 14:01:25,755 INFO L226 Difference]: Without dead ends: 795 [2022-12-13 14:01:25,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:01:25,757 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 27 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 14:01:25,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 145 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 14:01:25,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-12-13 14:01:26,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 711. [2022-12-13 14:01:26,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 481 states have (on average 1.1143451143451144) internal successors, (536), 508 states have internal predecessors, (536), 148 states have call successors, (148), 81 states have call predecessors, (148), 81 states have return successors, (140), 121 states have call predecessors, (140), 140 states have call successors, (140) [2022-12-13 14:01:26,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 824 transitions. [2022-12-13 14:01:26,070 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 824 transitions. Word has length 119 [2022-12-13 14:01:26,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:01:26,070 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 824 transitions. [2022-12-13 14:01:26,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-13 14:01:26,071 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 824 transitions. [2022-12-13 14:01:26,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-13 14:01:26,072 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:01:26,072 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 14:01:26,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 14:01:26,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 14:01:26,273 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:01:26,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:26,274 INFO L85 PathProgramCache]: Analyzing trace with hash -405037921, now seen corresponding path program 3 times [2022-12-13 14:01:26,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:01:26,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803833364] [2022-12-13 14:01:26,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:01:26,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:01:26,299 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:01:26,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14193305] [2022-12-13 14:01:26,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:01:26,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:01:26,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:01:26,305 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:01:26,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 14:01:26,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 14:01:26,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:01:26,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 14:01:26,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:01:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2022-12-13 14:01:26,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:01:29,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:01:29,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803833364] [2022-12-13 14:01:29,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:01:29,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14193305] [2022-12-13 14:01:29,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14193305] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:01:29,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:01:29,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-12-13 14:01:29,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193688836] [2022-12-13 14:01:29,957 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 14:01:29,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 14:01:29,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:01:29,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 14:01:29,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-12-13 14:01:29,957 INFO L87 Difference]: Start difference. First operand 711 states and 824 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 14:01:30,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:01:30,291 INFO L93 Difference]: Finished difference Result 741 states and 853 transitions. [2022-12-13 14:01:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 14:01:30,291 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-12-13 14:01:30,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:01:30,293 INFO L225 Difference]: With dead ends: 741 [2022-12-13 14:01:30,293 INFO L226 Difference]: Without dead ends: 727 [2022-12-13 14:01:30,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-12-13 14:01:30,294 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 27 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:01:30,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 57 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:01:30,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-12-13 14:01:30,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 712. [2022-12-13 14:01:30,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 486 states have (on average 1.1008230452674896) internal successors, (535), 507 states have internal predecessors, (535), 143 states have call successors, (143), 83 states have call predecessors, (143), 82 states have return successors, (140), 121 states have call predecessors, (140), 140 states have call successors, (140) [2022-12-13 14:01:30,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 818 transitions. [2022-12-13 14:01:30,546 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 818 transitions. Word has length 122 [2022-12-13 14:01:30,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:01:30,546 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 818 transitions. [2022-12-13 14:01:30,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 14:01:30,546 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 818 transitions. [2022-12-13 14:01:30,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-13 14:01:30,547 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:01:30,547 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:30,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 14:01:30,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 14:01:30,749 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:01:30,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:30,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1112250855, now seen corresponding path program 2 times [2022-12-13 14:01:30,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:01:30,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389578230] [2022-12-13 14:01:30,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:01:30,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:01:30,773 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:01:30,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548924960] [2022-12-13 14:01:30,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:01:30,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:01:30,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:01:30,777 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:01:30,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 14:01:30,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:01:30,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:01:30,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 14:01:30,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:01:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 415 proven. 0 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2022-12-13 14:01:30,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:01:30,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:01:30,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389578230] [2022-12-13 14:01:30,948 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:01:30,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548924960] [2022-12-13 14:01:30,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548924960] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:01:30,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:01:30,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 14:01:30,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719488928] [2022-12-13 14:01:30,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:01:30,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:01:30,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:01:30,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:01:30,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:01:30,949 INFO L87 Difference]: Start difference. First operand 712 states and 818 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-13 14:01:31,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:01:31,365 INFO L93 Difference]: Finished difference Result 863 states and 993 transitions. [2022-12-13 14:01:31,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:01:31,366 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 129 [2022-12-13 14:01:31,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:01:31,367 INFO L225 Difference]: With dead ends: 863 [2022-12-13 14:01:31,367 INFO L226 Difference]: Without dead ends: 666 [2022-12-13 14:01:31,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:01:31,368 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 12 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:01:31,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 126 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:01:31,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-12-13 14:01:31,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 661. [2022-12-13 14:01:31,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 452 states have (on average 1.1017699115044248) internal successors, (498), 470 states have internal predecessors, (498), 130 states have call successors, (130), 79 states have call predecessors, (130), 78 states have return successors, (127), 111 states have call predecessors, (127), 127 states have call successors, (127) [2022-12-13 14:01:31,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 755 transitions. [2022-12-13 14:01:31,606 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 755 transitions. Word has length 129 [2022-12-13 14:01:31,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:01:31,606 INFO L495 AbstractCegarLoop]: Abstraction has 661 states and 755 transitions. [2022-12-13 14:01:31,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-13 14:01:31,606 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 755 transitions. [2022-12-13 14:01:31,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-13 14:01:31,607 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:01:31,607 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:31,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 14:01:31,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 14:01:31,808 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:01:31,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:31,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1989463840, now seen corresponding path program 3 times [2022-12-13 14:01:31,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:01:31,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619857242] [2022-12-13 14:01:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:01:31,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:01:31,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:01:31,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893482787] [2022-12-13 14:01:31,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:01:31,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:01:31,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:01:31,828 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:01:31,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 14:01:31,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 14:01:31,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:01:31,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 14:01:31,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:01:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 163 proven. 56 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-12-13 14:01:32,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:01:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-12-13 14:01:32,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:01:32,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619857242] [2022-12-13 14:01:32,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:01:32,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893482787] [2022-12-13 14:01:32,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893482787] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:01:32,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:01:32,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2022-12-13 14:01:32,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8796538] [2022-12-13 14:01:32,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:01:32,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 14:01:32,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:01:32,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 14:01:32,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-12-13 14:01:32,111 INFO L87 Difference]: Start difference. First operand 661 states and 755 transitions. Second operand has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-12-13 14:01:32,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:01:32,613 INFO L93 Difference]: Finished difference Result 668 states and 761 transitions. [2022-12-13 14:01:32,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 14:01:32,613 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 133 [2022-12-13 14:01:32,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:01:32,615 INFO L225 Difference]: With dead ends: 668 [2022-12-13 14:01:32,615 INFO L226 Difference]: Without dead ends: 658 [2022-12-13 14:01:32,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-12-13 14:01:32,616 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 62 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 14:01:32,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 101 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 14:01:32,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-12-13 14:01:32,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 487. [2022-12-13 14:01:32,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 332 states have (on average 1.0843373493975903) internal successors, (360), 342 states have internal predecessors, (360), 91 states have call successors, (91), 63 states have call predecessors, (91), 63 states have return successors, (90), 81 states have call predecessors, (90), 90 states have call successors, (90) [2022-12-13 14:01:32,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 541 transitions. [2022-12-13 14:01:32,845 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 541 transitions. Word has length 133 [2022-12-13 14:01:32,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:01:32,845 INFO L495 AbstractCegarLoop]: Abstraction has 487 states and 541 transitions. [2022-12-13 14:01:32,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-12-13 14:01:32,845 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 541 transitions. [2022-12-13 14:01:32,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-12-13 14:01:32,847 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:01:32,847 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:32,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-13 14:01:33,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:01:33,047 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:01:33,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:33,047 INFO L85 PathProgramCache]: Analyzing trace with hash 888958317, now seen corresponding path program 1 times [2022-12-13 14:01:33,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:01:33,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810725625] [2022-12-13 14:01:33,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:01:33,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:01:33,055 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:01:33,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381564014] [2022-12-13 14:01:33,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:01:33,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:01:33,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:01:33,056 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:01:33,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 14:01:33,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:01:33,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 14:01:33,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:01:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 2222 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-12-13 14:01:33,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:01:33,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 326 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-12-13 14:01:33,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:01:33,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810725625] [2022-12-13 14:01:33,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:01:33,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381564014] [2022-12-13 14:01:33,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381564014] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:01:33,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:01:33,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 24 [2022-12-13 14:01:33,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194944969] [2022-12-13 14:01:33,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:01:33,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 14:01:33,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:01:33,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 14:01:33,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-12-13 14:01:33,553 INFO L87 Difference]: Start difference. First operand 487 states and 541 transitions. Second operand has 24 states, 24 states have (on average 5.833333333333333) internal successors, (140), 24 states have internal predecessors, (140), 20 states have call successors, (65), 16 states have call predecessors, (65), 15 states have return successors, (64), 19 states have call predecessors, (64), 19 states have call successors, (64) [2022-12-13 14:01:34,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:01:34,494 INFO L93 Difference]: Finished difference Result 747 states and 855 transitions. [2022-12-13 14:01:34,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-13 14:01:34,494 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.833333333333333) internal successors, (140), 24 states have internal predecessors, (140), 20 states have call successors, (65), 16 states have call predecessors, (65), 15 states have return successors, (64), 19 states have call predecessors, (64), 19 states have call successors, (64) Word has length 220 [2022-12-13 14:01:34,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:01:34,496 INFO L225 Difference]: With dead ends: 747 [2022-12-13 14:01:34,496 INFO L226 Difference]: Without dead ends: 734 [2022-12-13 14:01:34,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 406 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=517, Invalid=965, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 14:01:34,497 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 204 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 14:01:34,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 471 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 14:01:34,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-12-13 14:01:34,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 733. [2022-12-13 14:01:34,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 500 states have (on average 1.092) internal successors, (546), 516 states have internal predecessors, (546), 139 states have call successors, (139), 93 states have call predecessors, (139), 93 states have return successors, (138), 123 states have call predecessors, (138), 138 states have call successors, (138) [2022-12-13 14:01:34,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 823 transitions. [2022-12-13 14:01:34,848 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 823 transitions. Word has length 220 [2022-12-13 14:01:34,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:01:34,848 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 823 transitions. [2022-12-13 14:01:34,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.833333333333333) internal successors, (140), 24 states have internal predecessors, (140), 20 states have call successors, (65), 16 states have call predecessors, (65), 15 states have return successors, (64), 19 states have call predecessors, (64), 19 states have call successors, (64) [2022-12-13 14:01:34,849 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 823 transitions. [2022-12-13 14:01:34,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-12-13 14:01:34,854 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:01:34,855 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 17, 16, 16, 16, 16, 16, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:34,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 14:01:35,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:01:35,055 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:01:35,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:35,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1616344757, now seen corresponding path program 2 times [2022-12-13 14:01:35,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:01:35,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589821945] [2022-12-13 14:01:35,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:01:35,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:01:35,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:01:35,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946454437] [2022-12-13 14:01:35,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:01:35,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:01:35,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:01:35,070 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:01:35,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 14:01:35,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:01:35,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:01:35,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 14:01:35,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:01:35,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4660 backedges. 2247 proven. 69 refuted. 0 times theorem prover too weak. 2344 trivial. 0 not checked. [2022-12-13 14:01:35,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:01:44,314 WARN L233 SmtUtils]: Spent 6.77s on a formula simplification. DAG size of input: 61 DAG size of output: 13 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:01:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4660 backedges. 375 proven. 69 refuted. 0 times theorem prover too weak. 4216 trivial. 0 not checked. [2022-12-13 14:01:44,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:01:44,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589821945] [2022-12-13 14:01:44,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:01:44,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946454437] [2022-12-13 14:01:44,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946454437] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:01:44,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:01:44,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2022-12-13 14:01:44,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560943561] [2022-12-13 14:01:44,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:01:44,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 14:01:44,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:01:44,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 14:01:44,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-12-13 14:01:44,535 INFO L87 Difference]: Start difference. First operand 733 states and 823 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 16 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 16 states have call predecessors, (42), 16 states have call successors, (42) [2022-12-13 14:01:46,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:01:46,074 INFO L93 Difference]: Finished difference Result 1040 states and 1197 transitions. [2022-12-13 14:01:46,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 14:01:46,075 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 16 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 16 states have call predecessors, (42), 16 states have call successors, (42) Word has length 304 [2022-12-13 14:01:46,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:01:46,077 INFO L225 Difference]: With dead ends: 1040 [2022-12-13 14:01:46,077 INFO L226 Difference]: Without dead ends: 786 [2022-12-13 14:01:46,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-12-13 14:01:46,078 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 24 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 14:01:46,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 433 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 14:01:46,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-12-13 14:01:46,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 710. [2022-12-13 14:01:46,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 484 states have (on average 1.0909090909090908) internal successors, (528), 499 states have internal predecessors, (528), 134 states have call successors, (134), 91 states have call predecessors, (134), 91 states have return successors, (133), 119 states have call predecessors, (133), 133 states have call successors, (133) [2022-12-13 14:01:46,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 795 transitions. [2022-12-13 14:01:46,452 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 795 transitions. Word has length 304 [2022-12-13 14:01:46,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:01:46,453 INFO L495 AbstractCegarLoop]: Abstraction has 710 states and 795 transitions. [2022-12-13 14:01:46,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 16 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 16 states have call predecessors, (42), 16 states have call successors, (42) [2022-12-13 14:01:46,453 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 795 transitions. [2022-12-13 14:01:46,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-12-13 14:01:46,456 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:01:46,456 INFO L195 NwaCegarLoop]: trace histogram [46, 45, 45, 16, 15, 15, 15, 15, 15, 15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:46,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 14:01:46,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:01:46,657 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:01:46,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:46,659 INFO L85 PathProgramCache]: Analyzing trace with hash -839385710, now seen corresponding path program 3 times [2022-12-13 14:01:46,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:01:46,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740464800] [2022-12-13 14:01:46,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:01:46,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:01:46,702 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:01:46,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168141189] [2022-12-13 14:01:46,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:01:46,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:01:46,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:01:46,705 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:01:46,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 14:01:48,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2022-12-13 14:01:48,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:01:48,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 14:01:48,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:01:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4770 backedges. 2420 proven. 122 refuted. 0 times theorem prover too weak. 2228 trivial. 0 not checked. [2022-12-13 14:01:48,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:03:19,535 WARN L233 SmtUtils]: Spent 1.47m on a formula simplification. DAG size of input: 108 DAG size of output: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:03:24,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:03:24,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740464800] [2022-12-13 14:03:24,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:03:24,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168141189] [2022-12-13 14:03:24,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168141189] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:03:24,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:03:24,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-12-13 14:03:24,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477438685] [2022-12-13 14:03:24,827 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 14:03:24,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 14:03:24,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:03:24,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 14:03:24,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=555, Unknown=1, NotChecked=0, Total=650 [2022-12-13 14:03:24,828 INFO L87 Difference]: Start difference. First operand 710 states and 795 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 12 states have call predecessors, (27), 11 states have call successors, (27) [2022-12-13 14:03:26,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:03:26,070 INFO L93 Difference]: Finished difference Result 926 states and 1044 transitions. [2022-12-13 14:03:26,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 14:03:26,070 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 12 states have call predecessors, (27), 11 states have call successors, (27) Word has length 308 [2022-12-13 14:03:26,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:03:26,072 INFO L225 Difference]: With dead ends: 926 [2022-12-13 14:03:26,072 INFO L226 Difference]: Without dead ends: 687 [2022-12-13 14:03:26,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 94.8s TimeCoverageRelationStatistics Valid=149, Invalid=906, Unknown=1, NotChecked=0, Total=1056 [2022-12-13 14:03:26,073 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 20 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 14:03:26,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 468 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 14:03:26,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-12-13 14:03:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 687. [2022-12-13 14:03:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 468 states have (on average 1.0897435897435896) internal successors, (510), 482 states have internal predecessors, (510), 129 states have call successors, (129), 89 states have call predecessors, (129), 89 states have return successors, (128), 115 states have call predecessors, (128), 128 states have call successors, (128) [2022-12-13 14:03:26,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 767 transitions. [2022-12-13 14:03:26,399 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 767 transitions. Word has length 308 [2022-12-13 14:03:26,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:03:26,399 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 767 transitions. [2022-12-13 14:03:26,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 12 states have call predecessors, (27), 11 states have call successors, (27) [2022-12-13 14:03:26,400 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 767 transitions. [2022-12-13 14:03:26,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2022-12-13 14:03:26,401 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:03:26,401 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 46, 15, 14, 14, 14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:03:26,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 14:03:26,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:03:26,603 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:03:26,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:03:26,604 INFO L85 PathProgramCache]: Analyzing trace with hash -2047017297, now seen corresponding path program 4 times [2022-12-13 14:03:26,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:03:26,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775713274] [2022-12-13 14:03:26,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:03:26,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:03:26,639 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:03:26,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369347984] [2022-12-13 14:03:26,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:03:26,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:03:26,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:03:26,641 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:03:26,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 14:03:27,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:03:27,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:03:27,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 126 conjunts are in the unsatisfiable core [2022-12-13 14:03:27,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:03:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 2283 proven. 1822 refuted. 0 times theorem prover too weak. 791 trivial. 0 not checked. [2022-12-13 14:03:28,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:03:29,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:03:29,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775713274] [2022-12-13 14:03:29,118 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:03:29,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369347984] [2022-12-13 14:03:29,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369347984] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:03:29,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:03:29,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2022-12-13 14:03:29,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565211402] [2022-12-13 14:03:29,118 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 14:03:29,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-13 14:03:29,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:03:29,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-13 14:03:29,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2459, Unknown=0, NotChecked=0, Total=2652 [2022-12-13 14:03:29,120 INFO L87 Difference]: Start difference. First operand 687 states and 767 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 43 states have internal predecessors, (95), 15 states have call successors, (33), 13 states have call predecessors, (33), 15 states have return successors, (32), 14 states have call predecessors, (32), 15 states have call successors, (32) [2022-12-13 14:03:32,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:03:32,371 INFO L93 Difference]: Finished difference Result 868 states and 981 transitions. [2022-12-13 14:03:32,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-13 14:03:32,372 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 43 states have internal predecessors, (95), 15 states have call successors, (33), 13 states have call predecessors, (33), 15 states have return successors, (32), 14 states have call predecessors, (32), 15 states have call successors, (32) Word has length 312 [2022-12-13 14:03:32,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:03:32,373 INFO L225 Difference]: With dead ends: 868 [2022-12-13 14:03:32,373 INFO L226 Difference]: Without dead ends: 664 [2022-12-13 14:03:32,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 442 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=203, Invalid=2659, Unknown=0, NotChecked=0, Total=2862 [2022-12-13 14:03:32,374 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 101 mSDsluCounter, 2320 mSDsCounter, 0 mSdLazyCounter, 4880 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 2496 SdHoareTripleChecker+Invalid, 4893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 4880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-13 14:03:32,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 2496 Invalid, 4893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 4880 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-13 14:03:32,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-12-13 14:03:32,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 664. [2022-12-13 14:03:32,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 452 states have (on average 1.0884955752212389) internal successors, (492), 465 states have internal predecessors, (492), 124 states have call successors, (124), 87 states have call predecessors, (124), 87 states have return successors, (123), 111 states have call predecessors, (123), 123 states have call successors, (123) [2022-12-13 14:03:32,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 739 transitions. [2022-12-13 14:03:32,693 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 739 transitions. Word has length 312 [2022-12-13 14:03:32,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:03:32,693 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 739 transitions. [2022-12-13 14:03:32,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 43 states have internal predecessors, (95), 15 states have call successors, (33), 13 states have call predecessors, (33), 15 states have return successors, (32), 14 states have call predecessors, (32), 15 states have call successors, (32) [2022-12-13 14:03:32,694 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 739 transitions. [2022-12-13 14:03:32,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-12-13 14:03:32,695 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:03:32,695 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:03:32,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-13 14:03:32,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:03:32,897 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:03:32,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:03:32,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1847308228, now seen corresponding path program 2 times [2022-12-13 14:03:32,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:03:32,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868748888] [2022-12-13 14:03:32,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:03:32,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:03:32,927 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:03:32,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420184488] [2022-12-13 14:03:32,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:03:32,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:03:32,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:03:32,928 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:03:32,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 14:03:33,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:03:33,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:03:33,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 14:03:33,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:03:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5132 backedges. 2220 proven. 1910 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2022-12-13 14:03:33,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:03:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5132 backedges. 96 proven. 290 refuted. 0 times theorem prover too weak. 4746 trivial. 0 not checked. [2022-12-13 14:03:33,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:03:33,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868748888] [2022-12-13 14:03:33,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:03:33,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420184488] [2022-12-13 14:03:33,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420184488] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:03:33,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:03:33,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2022-12-13 14:03:33,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680412850] [2022-12-13 14:03:33,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:03:33,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 14:03:33,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:03:33,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 14:03:33,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-12-13 14:03:33,699 INFO L87 Difference]: Start difference. First operand 664 states and 739 transitions. Second operand has 24 states, 24 states have (on average 4.5) internal successors, (108), 24 states have internal predecessors, (108), 20 states have call successors, (65), 12 states have call predecessors, (65), 12 states have return successors, (64), 20 states have call predecessors, (64), 20 states have call successors, (64) [2022-12-13 14:03:35,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:03:35,075 INFO L93 Difference]: Finished difference Result 912 states and 1014 transitions. [2022-12-13 14:03:35,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 14:03:35,076 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.5) internal successors, (108), 24 states have internal predecessors, (108), 20 states have call successors, (65), 12 states have call predecessors, (65), 12 states have return successors, (64), 20 states have call predecessors, (64), 20 states have call successors, (64) Word has length 316 [2022-12-13 14:03:35,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:03:35,079 INFO L225 Difference]: With dead ends: 912 [2022-12-13 14:03:35,079 INFO L226 Difference]: Without dead ends: 666 [2022-12-13 14:03:35,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 606 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=665, Invalid=1141, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 14:03:35,080 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 251 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 14:03:35,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 547 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 14:03:35,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-12-13 14:03:35,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 666. [2022-12-13 14:03:35,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 454 states have (on average 1.0682819383259912) internal successors, (485), 467 states have internal predecessors, (485), 124 states have call successors, (124), 87 states have call predecessors, (124), 87 states have return successors, (123), 111 states have call predecessors, (123), 123 states have call successors, (123) [2022-12-13 14:03:35,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 732 transitions. [2022-12-13 14:03:35,402 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 732 transitions. Word has length 316 [2022-12-13 14:03:35,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:03:35,402 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 732 transitions. [2022-12-13 14:03:35,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.5) internal successors, (108), 24 states have internal predecessors, (108), 20 states have call successors, (65), 12 states have call predecessors, (65), 12 states have return successors, (64), 20 states have call predecessors, (64), 20 states have call successors, (64) [2022-12-13 14:03:35,402 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 732 transitions. [2022-12-13 14:03:35,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-12-13 14:03:35,404 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:03:35,404 INFO L195 NwaCegarLoop]: trace histogram [48, 47, 47, 14, 13, 13, 13, 13, 13, 13, 13, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:03:35,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 14:03:35,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 14:03:35,605 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:03:35,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:03:35,606 INFO L85 PathProgramCache]: Analyzing trace with hash -701519348, now seen corresponding path program 5 times [2022-12-13 14:03:35,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:03:35,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427882305] [2022-12-13 14:03:35,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:03:35,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:03:35,629 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:03:35,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367398871] [2022-12-13 14:03:35,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 14:03:35,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:03:35,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:03:35,632 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:03:35,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 14:03:44,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-12-13 14:03:44,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:03:44,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 114 conjunts are in the unsatisfiable core [2022-12-13 14:03:44,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:03:54,572 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:04:11,327 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:04:31,678 WARN L233 SmtUtils]: Spent 20.10s on a formula simplification. DAG size of input: 89 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:04:41,941 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:05:02,668 WARN L233 SmtUtils]: Spent 20.19s on a formula simplification. DAG size of input: 73 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:05:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5038 backedges. 2298 proven. 336 refuted. 0 times theorem prover too weak. 2404 trivial. 0 not checked. [2022-12-13 14:05:02,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:05:16,871 WARN L233 SmtUtils]: Spent 12.46s on a formula simplification. DAG size of input: 105 DAG size of output: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:06:46,272 WARN L233 SmtUtils]: Spent 1.41m on a formula simplification. DAG size of input: 105 DAG size of output: 104 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:06:46,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:06:46,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427882305] [2022-12-13 14:06:46,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:06:46,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367398871] [2022-12-13 14:06:46,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367398871] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:06:46,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:06:46,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-12-13 14:06:46,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589961989] [2022-12-13 14:06:46,280 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 14:06:46,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 14:06:46,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:06:46,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 14:06:46,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1093, Unknown=1, NotChecked=0, Total=1260 [2022-12-13 14:06:46,281 INFO L87 Difference]: Start difference. First operand 666 states and 732 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 24 states have internal predecessors, (66), 15 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 19 states have call predecessors, (37), 15 states have call successors, (37) [2022-12-13 14:07:09,377 WARN L233 SmtUtils]: Spent 20.08s on a formula simplification. DAG size of input: 72 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:07:11,390 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 [0] [2022-12-13 14:07:13,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:07:15,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:07:17,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:07:19,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:07:41,551 WARN L233 SmtUtils]: Spent 20.05s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:08:01,912 WARN L233 SmtUtils]: Spent 20.24s on a formula simplification. DAG size of input: 78 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:08:03,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:08:05,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:08:28,509 WARN L233 SmtUtils]: Spent 20.52s on a formula simplification. DAG size of input: 77 DAG size of output: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:08:30,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:08:32,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:08:34,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:08:36,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:08:38,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:08:40,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:08:42,925 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 [0] [2022-12-13 14:09:09,070 WARN L233 SmtUtils]: Spent 20.07s on a formula simplification. DAG size of input: 65 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:09:09,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:09:09,248 INFO L93 Difference]: Finished difference Result 845 states and 949 transitions. [2022-12-13 14:09:09,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 14:09:09,250 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 24 states have internal predecessors, (66), 15 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 19 states have call predecessors, (37), 15 states have call successors, (37) Word has length 316 [2022-12-13 14:09:09,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:09:09,251 INFO L225 Difference]: With dead ends: 845 [2022-12-13 14:09:09,251 INFO L226 Difference]: Without dead ends: 643 [2022-12-13 14:09:09,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 286.7s TimeCoverageRelationStatistics Valid=254, Invalid=1810, Unknown=6, NotChecked=0, Total=2070 [2022-12-13 14:09:09,252 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 32 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 2098 mSolverCounterSat, 41 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 2152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2098 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:09:09,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 973 Invalid, 2152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2098 Invalid, 13 Unknown, 0 Unchecked, 31.0s Time] [2022-12-13 14:09:09,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-12-13 14:09:09,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 643. [2022-12-13 14:09:09,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 438 states have (on average 1.0662100456621004) internal successors, (467), 450 states have internal predecessors, (467), 119 states have call successors, (119), 85 states have call predecessors, (119), 85 states have return successors, (118), 107 states have call predecessors, (118), 118 states have call successors, (118) [2022-12-13 14:09:09,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 704 transitions. [2022-12-13 14:09:09,564 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 704 transitions. Word has length 316 [2022-12-13 14:09:09,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:09:09,564 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 704 transitions. [2022-12-13 14:09:09,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 24 states have internal predecessors, (66), 15 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 19 states have call predecessors, (37), 15 states have call successors, (37) [2022-12-13 14:09:09,565 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 704 transitions. [2022-12-13 14:09:09,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-12-13 14:09:09,566 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:09:09,566 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 13, 12, 12, 12, 12, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:09:09,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 14:09:09,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 14:09:09,767 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:09:09,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:09:09,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1005768791, now seen corresponding path program 6 times [2022-12-13 14:09:09,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:09:09,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731967027] [2022-12-13 14:09:09,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:09:09,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:09:09,776 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:09:09,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446602064] [2022-12-13 14:09:09,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 14:09:09,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:09:09,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:09:09,777 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:09:09,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 14:09:10,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2022-12-13 14:09:10,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:09:10,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 79 conjunts are in the unsatisfiable core [2022-12-13 14:09:10,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:09:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5196 backedges. 1661 proven. 356 refuted. 0 times theorem prover too weak. 3179 trivial. 0 not checked. [2022-12-13 14:09:11,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:10:25,053 WARN L233 SmtUtils]: Spent 19.23s on a formula simplification that was a NOOP. DAG size: 453 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:13:55,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5196 backedges. 433 proven. 344 refuted. 0 times theorem prover too weak. 4419 trivial. 0 not checked. [2022-12-13 14:13:55,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:13:55,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731967027] [2022-12-13 14:13:55,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:13:55,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446602064] [2022-12-13 14:13:55,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446602064] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:13:55,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:13:55,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2022-12-13 14:13:55,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923005762] [2022-12-13 14:13:55,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:13:55,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 14:13:55,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:13:55,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 14:13:55,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1319, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 14:13:55,680 INFO L87 Difference]: Start difference. First operand 643 states and 704 transitions. Second operand has 40 states, 40 states have (on average 3.175) internal successors, (127), 38 states have internal predecessors, (127), 32 states have call successors, (83), 2 states have call predecessors, (83), 3 states have return successors, (82), 30 states have call predecessors, (82), 32 states have call successors, (82) [2022-12-13 14:14:04,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:14:10,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:14:12,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:14:14,551 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 [] [2022-12-13 14:14:14,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:14:14,857 INFO L93 Difference]: Finished difference Result 797 states and 897 transitions. [2022-12-13 14:14:14,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 14:14:14,857 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.175) internal successors, (127), 38 states have internal predecessors, (127), 32 states have call successors, (83), 2 states have call predecessors, (83), 3 states have return successors, (82), 30 states have call predecessors, (82), 32 states have call successors, (82) Word has length 320 [2022-12-13 14:14:14,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:14:14,859 INFO L225 Difference]: With dead ends: 797 [2022-12-13 14:14:14,859 INFO L226 Difference]: Without dead ends: 620 [2022-12-13 14:14:14,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 599 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=246, Invalid=1394, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 14:14:14,860 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 68 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 2251 mSolverCounterSat, 54 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2251 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2022-12-13 14:14:14,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 771 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2251 Invalid, 3 Unknown, 0 Unchecked, 18.7s Time] [2022-12-13 14:14:14,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-12-13 14:14:15,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2022-12-13 14:14:15,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 422 states have (on average 1.0639810426540284) internal successors, (449), 433 states have internal predecessors, (449), 114 states have call successors, (114), 83 states have call predecessors, (114), 83 states have return successors, (113), 103 states have call predecessors, (113), 113 states have call successors, (113) [2022-12-13 14:14:15,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 676 transitions. [2022-12-13 14:14:15,179 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 676 transitions. Word has length 320 [2022-12-13 14:14:15,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:14:15,179 INFO L495 AbstractCegarLoop]: Abstraction has 620 states and 676 transitions. [2022-12-13 14:14:15,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.175) internal successors, (127), 38 states have internal predecessors, (127), 32 states have call successors, (83), 2 states have call predecessors, (83), 3 states have return successors, (82), 30 states have call predecessors, (82), 32 states have call successors, (82) [2022-12-13 14:14:15,179 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 676 transitions. [2022-12-13 14:14:15,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-12-13 14:14:15,182 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:14:15,182 INFO L195 NwaCegarLoop]: trace histogram [50, 49, 49, 12, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:14:15,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 14:14:15,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 14:14:15,383 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:14:15,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:14:15,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1741078406, now seen corresponding path program 7 times [2022-12-13 14:14:15,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:14:15,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348246894] [2022-12-13 14:14:15,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:15,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:14:15,393 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:14:15,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281848096] [2022-12-13 14:14:15,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 14:14:15,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:14:15,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:14:15,394 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:14:15,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9ae579-2566-41ac-9d5f-aefb13d2bea2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 14:14:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:15,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 75 conjunts are in the unsatisfiable core [2022-12-13 14:14:15,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:14:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 942 proven. 424 refuted. 0 times theorem prover too weak. 4004 trivial. 0 not checked. [2022-12-13 14:14:16,372 INFO L328 TraceCheckSpWp]: Computing backward predicates...