./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/duplets.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_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/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_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/duplets.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/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_77148333-540b-4eba-a68a-86ea44dff949/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 ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 --- 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 16:13:30,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:13:30,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:13:30,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:13:30,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:13:30,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:13:30,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:13:30,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:13:30,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:13:30,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:13:30,771 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:13:30,772 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:13:30,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:13:30,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:13:30,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:13:30,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:13:30,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:13:30,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:13:30,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:13:30,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:13:30,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:13:30,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:13:30,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:13:30,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:13:30,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:13:30,791 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:13:30,791 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:13:30,792 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:13:30,792 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:13:30,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:13:30,794 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:13:30,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:13:30,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:13:30,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:13:30,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:13:30,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:13:30,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:13:30,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:13:30,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:13:30,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:13:30,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:13:30,799 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 16:13:30,820 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:13:30,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:13:30,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:13:30,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:13:30,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:13:30,822 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:13:30,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:13:30,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:13:30,823 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:13:30,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:13:30,823 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:13:30,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:13:30,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:13:30,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:13:30,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 16:13:30,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:13:30,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 16:13:30,824 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:13:30,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 16:13:30,825 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:13:30,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 16:13:30,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:13:30,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:13:30,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:13:30,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:13:30,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:13:30,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:13:30,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 16:13:30,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:13:30,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:13:30,826 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:13:30,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 16:13:30,826 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:13:30,826 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:13:30,827 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:13:30,827 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_77148333-540b-4eba-a68a-86ea44dff949/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 [2022-12-13 16:13:31,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:13:31,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:13:31,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:13:31,031 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:13:31,032 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:13:31,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/verifythis/duplets.c [2022-12-13 16:13:33,647 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:13:33,791 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:13:33,791 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/sv-benchmarks/c/verifythis/duplets.c [2022-12-13 16:13:33,797 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/data/142e58685/f463adcd4c894ab295bdeb0da1eb0482/FLAGd0f882873 [2022-12-13 16:13:33,809 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/data/142e58685/f463adcd4c894ab295bdeb0da1eb0482 [2022-12-13 16:13:33,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:13:33,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:13:33,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:13:33,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:13:33,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:13:33,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:13:33" (1/1) ... [2022-12-13 16:13:33,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1117061d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:13:33, skipping insertion in model container [2022-12-13 16:13:33,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:13:33" (1/1) ... [2022-12-13 16:13:33,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:13:33,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:13:33,964 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_77148333-540b-4eba-a68a-86ea44dff949/sv-benchmarks/c/verifythis/duplets.c[485,498] [2022-12-13 16:13:33,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:13:34,000 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:13:34,012 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_77148333-540b-4eba-a68a-86ea44dff949/sv-benchmarks/c/verifythis/duplets.c[485,498] [2022-12-13 16:13:34,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:13:34,039 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:13:34,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:13:34 WrapperNode [2022-12-13 16:13:34,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:13:34,041 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:13:34,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:13:34,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:13:34,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:13:34" (1/1) ... [2022-12-13 16:13:34,057 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:13:34" (1/1) ... [2022-12-13 16:13:34,078 INFO L138 Inliner]: procedures = 21, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 120 [2022-12-13 16:13:34,079 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:13:34,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:13:34,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:13:34,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:13:34,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:13:34" (1/1) ... [2022-12-13 16:13:34,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:13:34" (1/1) ... [2022-12-13 16:13:34,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:13:34" (1/1) ... [2022-12-13 16:13:34,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:13:34" (1/1) ... [2022-12-13 16:13:34,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:13:34" (1/1) ... [2022-12-13 16:13:34,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:13:34" (1/1) ... [2022-12-13 16:13:34,098 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:13:34" (1/1) ... [2022-12-13 16:13:34,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:13:34" (1/1) ... [2022-12-13 16:13:34,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:13:34,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:13:34,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:13:34,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:13:34,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:13:34" (1/1) ... [2022-12-13 16:13:34,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:13:34,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:13:34,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:13:34,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:13:34,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:13:34,159 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-13 16:13:34,159 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-13 16:13:34,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:13:34,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:13:34,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:13:34,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 16:13:34,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:13:34,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:13:34,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:13:34,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 16:13:34,160 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 16:13:34,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:13:34,244 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:13:34,245 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:13:34,437 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:13:34,442 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:13:34,442 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 16:13:34,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:13:34 BoogieIcfgContainer [2022-12-13 16:13:34,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:13:34,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:13:34,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:13:34,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:13:34,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:13:33" (1/3) ... [2022-12-13 16:13:34,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab71a07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:13:34, skipping insertion in model container [2022-12-13 16:13:34,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:13:34" (2/3) ... [2022-12-13 16:13:34,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab71a07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:13:34, skipping insertion in model container [2022-12-13 16:13:34,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:13:34" (3/3) ... [2022-12-13 16:13:34,451 INFO L112 eAbstractionObserver]: Analyzing ICFG duplets.c [2022-12-13 16:13:34,465 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:13:34,465 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 16:13:34,502 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:13:34,507 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;@3972608, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:13:34,508 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 16:13:34,511 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 30 states have internal predecessors, (39), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 16:13:34,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 16:13:34,517 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:13:34,518 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:13:34,518 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:13:34,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:13:34,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1761765480, now seen corresponding path program 1 times [2022-12-13 16:13:34,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:13:34,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453129185] [2022-12-13 16:13:34,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:13:34,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:13:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:34,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:13:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:34,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 16:13:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:34,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 16:13:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:34,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 16:13:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:34,678 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 16:13:34,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:13:34,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453129185] [2022-12-13 16:13:34,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453129185] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:13:34,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:13:34,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:13:34,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124175893] [2022-12-13 16:13:34,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:13:34,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 16:13:34,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:13:34,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 16:13:34,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 16:13:34,708 INFO L87 Difference]: Start difference. First operand has 42 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 30 states have internal predecessors, (39), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 16:13:34,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:13:34,726 INFO L93 Difference]: Finished difference Result 81 states and 119 transitions. [2022-12-13 16:13:34,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 16:13:34,727 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-12-13 16:13:34,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:13:34,732 INFO L225 Difference]: With dead ends: 81 [2022-12-13 16:13:34,732 INFO L226 Difference]: Without dead ends: 38 [2022-12-13 16:13:34,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 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 16:13:34,737 INFO L413 NwaCegarLoop]: 53 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, 53 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 16:13:34,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:13:34,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-13 16:13:34,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-12-13 16:13:34,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 16:13:34,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-12-13 16:13:34,766 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 33 [2022-12-13 16:13:34,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:13:34,767 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-12-13 16:13:34,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 16:13:34,767 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-12-13 16:13:34,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 16:13:34,768 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:13:34,768 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:13:34,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:13:34,769 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:13:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:13:34,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1486889832, now seen corresponding path program 1 times [2022-12-13 16:13:34,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:13:34,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151549330] [2022-12-13 16:13:34,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:13:34,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:13:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:35,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:13:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:35,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 16:13:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:35,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 16:13:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:35,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 16:13:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:35,113 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 16:13:35,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:13:35,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151549330] [2022-12-13 16:13:35,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151549330] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:13:35,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281008363] [2022-12-13 16:13:35,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:13:35,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:13:35,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:13:35,116 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:13:35,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:13:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:35,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 16:13:35,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:13:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 16:13:35,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:13:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 16:13:35,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281008363] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:13:35,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:13:35,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-12-13 16:13:35,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255716790] [2022-12-13 16:13:35,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:13:35,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 16:13:35,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:13:35,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 16:13:35,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:13:35,448 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 13 states, 9 states have (on average 2.888888888888889) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-13 16:13:35,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:13:35,645 INFO L93 Difference]: Finished difference Result 86 states and 117 transitions. [2022-12-13 16:13:35,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 16:13:35,645 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 2.888888888888889) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 33 [2022-12-13 16:13:35,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:13:35,647 INFO L225 Difference]: With dead ends: 86 [2022-12-13 16:13:35,647 INFO L226 Difference]: Without dead ends: 67 [2022-12-13 16:13:35,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-12-13 16:13:35,649 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 169 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:13:35,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 244 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:13:35,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-12-13 16:13:35,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 39. [2022-12-13 16:13:35,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 16:13:35,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2022-12-13 16:13:35,661 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 33 [2022-12-13 16:13:35,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:13:35,661 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2022-12-13 16:13:35,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 2.888888888888889) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-13 16:13:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2022-12-13 16:13:35,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-13 16:13:35,663 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:13:35,663 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:13:35,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:13:35,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:13:35,865 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:13:35,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:13:35,867 INFO L85 PathProgramCache]: Analyzing trace with hash -534242288, now seen corresponding path program 1 times [2022-12-13 16:13:35,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:13:35,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141080983] [2022-12-13 16:13:35,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:13:35,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:13:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:36,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:13:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:36,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 16:13:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:36,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 16:13:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:36,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 16:13:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 16:13:36,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:13:36,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141080983] [2022-12-13 16:13:36,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141080983] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:13:36,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:13:36,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 16:13:36,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776099905] [2022-12-13 16:13:36,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:13:36,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:13:36,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:13:36,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:13:36,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:13:36,061 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 16:13:36,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:13:36,099 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-12-13 16:13:36,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:13:36,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2022-12-13 16:13:36,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:13:36,100 INFO L225 Difference]: With dead ends: 57 [2022-12-13 16:13:36,100 INFO L226 Difference]: Without dead ends: 55 [2022-12-13 16:13:36,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:13:36,101 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 22 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:13:36,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 234 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:13:36,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-13 16:13:36,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2022-12-13 16:13:36,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 16:13:36,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-12-13 16:13:36,108 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 34 [2022-12-13 16:13:36,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:13:36,108 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-12-13 16:13:36,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 16:13:36,108 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-12-13 16:13:36,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 16:13:36,109 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:13:36,109 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:13:36,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 16:13:36,109 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:13:36,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:13:36,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1697931955, now seen corresponding path program 1 times [2022-12-13 16:13:36,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:13:36,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299369665] [2022-12-13 16:13:36,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:13:36,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:13:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:36,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:13:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:36,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 16:13:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:36,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 16:13:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:36,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 16:13:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 16:13:36,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:13:36,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299369665] [2022-12-13 16:13:36,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299369665] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:13:36,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:13:36,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 16:13:36,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147894044] [2022-12-13 16:13:36,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:13:36,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 16:13:36,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:13:36,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 16:13:36,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-12-13 16:13:36,496 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 11 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 16:13:36,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:13:36,860 INFO L93 Difference]: Finished difference Result 92 states and 120 transitions. [2022-12-13 16:13:36,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 16:13:36,861 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-12-13 16:13:36,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:13:36,863 INFO L225 Difference]: With dead ends: 92 [2022-12-13 16:13:36,863 INFO L226 Difference]: Without dead ends: 62 [2022-12-13 16:13:36,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-12-13 16:13:36,865 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 178 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:13:36,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 215 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:13:36,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-12-13 16:13:36,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2022-12-13 16:13:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.1875) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 16:13:36,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-12-13 16:13:36,879 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 36 [2022-12-13 16:13:36,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:13:36,879 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-12-13 16:13:36,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 16:13:36,879 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-12-13 16:13:36,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 16:13:36,880 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:13:36,880 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:13:36,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 16:13:36,881 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:13:36,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:13:36,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1519460479, now seen corresponding path program 1 times [2022-12-13 16:13:36,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:13:36,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878573811] [2022-12-13 16:13:36,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:13:36,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:13:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:36,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:13:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:36,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 16:13:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:36,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 16:13:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:36,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 16:13:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 16:13:36,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:13:36,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878573811] [2022-12-13 16:13:36,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878573811] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:13:36,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679350685] [2022-12-13 16:13:36,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:13:36,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:13:36,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:13:36,948 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:13:36,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:13:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:37,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 16:13:37,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:13:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 16:13:37,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:13:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 16:13:37,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679350685] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:13:37,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:13:37,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-12-13 16:13:37,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437925567] [2022-12-13 16:13:37,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:13:37,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:13:37,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:13:37,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:13:37,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:13:37,052 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 16:13:37,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:13:37,100 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2022-12-13 16:13:37,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:13:37,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2022-12-13 16:13:37,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:13:37,101 INFO L225 Difference]: With dead ends: 78 [2022-12-13 16:13:37,101 INFO L226 Difference]: Without dead ends: 59 [2022-12-13 16:13:37,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:13:37,102 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 35 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:13:37,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 128 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:13:37,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-13 16:13:37,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2022-12-13 16:13:37,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 16:13:37,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-12-13 16:13:37,117 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 39 [2022-12-13 16:13:37,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:13:37,117 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-12-13 16:13:37,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 16:13:37,117 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-12-13 16:13:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 16:13:37,118 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:13:37,118 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:13:37,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:13:37,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:13:37,319 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:13:37,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:13:37,319 INFO L85 PathProgramCache]: Analyzing trace with hash 764415265, now seen corresponding path program 1 times [2022-12-13 16:13:37,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:13:37,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660803248] [2022-12-13 16:13:37,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:13:37,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:13:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:37,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:13:37,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:37,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 16:13:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:37,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 16:13:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:37,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 16:13:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:37,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 16:13:37,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 16:13:37,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:13:37,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660803248] [2022-12-13 16:13:37,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660803248] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:13:37,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591432899] [2022-12-13 16:13:37,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:13:37,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:13:37,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:13:37,739 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:13:37,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:13:37,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:37,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 16:13:37,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:13:37,957 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 16:13:37,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2022-12-13 16:13:38,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-13 16:13:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 16:13:38,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:13:38,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 150 [2022-12-13 16:13:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 16:13:38,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591432899] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:13:38,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:13:38,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 28 [2022-12-13 16:13:38,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431545278] [2022-12-13 16:13:38,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:13:38,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 16:13:38,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:13:38,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 16:13:38,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2022-12-13 16:13:38,513 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 28 states, 24 states have (on average 1.625) internal successors, (39), 26 states have internal predecessors, (39), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 16:13:39,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:13:39,537 INFO L93 Difference]: Finished difference Result 118 states and 156 transitions. [2022-12-13 16:13:39,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 16:13:39,537 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 1.625) internal successors, (39), 26 states have internal predecessors, (39), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 41 [2022-12-13 16:13:39,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:13:39,538 INFO L225 Difference]: With dead ends: 118 [2022-12-13 16:13:39,538 INFO L226 Difference]: Without dead ends: 104 [2022-12-13 16:13:39,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=314, Invalid=1666, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 16:13:39,540 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 183 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 16:13:39,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 383 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 16:13:39,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-13 16:13:39,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 75. [2022-12-13 16:13:39,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 59 states have internal predecessors, (69), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-13 16:13:39,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2022-12-13 16:13:39,559 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 41 [2022-12-13 16:13:39,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:13:39,559 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2022-12-13 16:13:39,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 1.625) internal successors, (39), 26 states have internal predecessors, (39), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 16:13:39,560 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2022-12-13 16:13:39,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 16:13:39,560 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:13:39,560 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:13:39,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:13:39,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:13:39,764 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:13:39,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:13:39,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1347467836, now seen corresponding path program 2 times [2022-12-13 16:13:39,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:13:39,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439238100] [2022-12-13 16:13:39,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:13:39,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:13:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:40,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:13:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:40,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 16:13:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:40,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 16:13:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:40,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 16:13:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-13 16:13:40,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:13:40,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439238100] [2022-12-13 16:13:40,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439238100] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:13:40,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75774124] [2022-12-13 16:13:40,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:13:40,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:13:40,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:13:40,544 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:13:40,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:13:40,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:13:40,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:13:40,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-13 16:13:40,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:13:40,759 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-13 16:13:40,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-12-13 16:13:43,230 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 16:13:43,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 62 [2022-12-13 16:13:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-13 16:13:45,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:13:47,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:13:47,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 503 treesize of output 435 [2022-12-13 16:13:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-13 16:13:48,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75774124] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:13:48,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:13:48,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2022-12-13 16:13:48,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224320088] [2022-12-13 16:13:48,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:13:48,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 16:13:48,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:13:48,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 16:13:48,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1139, Unknown=3, NotChecked=0, Total=1260 [2022-12-13 16:13:48,912 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 36 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 16:13:50,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 16:13:57,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 16:14:03,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 16:14:07,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 16:14:10,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 16:14:15,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 16:14:17,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 16:14:20,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:14:20,327 INFO L93 Difference]: Finished difference Result 159 states and 210 transitions. [2022-12-13 16:14:20,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 16:14:20,328 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 42 [2022-12-13 16:14:20,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:14:20,329 INFO L225 Difference]: With dead ends: 159 [2022-12-13 16:14:20,329 INFO L226 Difference]: Without dead ends: 111 [2022-12-13 16:14:20,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=506, Invalid=2143, Unknown=3, NotChecked=0, Total=2652 [2022-12-13 16:14:20,330 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 506 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 154 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2022-12-13 16:14:20,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 570 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 608 Invalid, 11 Unknown, 0 Unchecked, 20.2s Time] [2022-12-13 16:14:20,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-12-13 16:14:20,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 78. [2022-12-13 16:14:20,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 62 states have internal predecessors, (73), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-13 16:14:20,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 98 transitions. [2022-12-13 16:14:20,348 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 98 transitions. Word has length 42 [2022-12-13 16:14:20,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:14:20,348 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 98 transitions. [2022-12-13 16:14:20,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 16:14:20,349 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 98 transitions. [2022-12-13 16:14:20,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 16:14:20,349 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:14:20,349 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:14:20,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 16:14:20,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 16:14:20,551 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:14:20,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:14:20,552 INFO L85 PathProgramCache]: Analyzing trace with hash 236785912, now seen corresponding path program 3 times [2022-12-13 16:14:20,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:14:20,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421015747] [2022-12-13 16:14:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:14:20,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:14:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:20,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:14:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:20,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 16:14:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:20,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 16:14:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:20,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 16:14:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 16:14:20,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:14:20,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421015747] [2022-12-13 16:14:20,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421015747] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:14:20,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348674999] [2022-12-13 16:14:20,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:14:20,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:14:20,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:14:20,648 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:14:20,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 16:14:20,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 16:14:20,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:14:20,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:14:20,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:14:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 16:14:20,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:14:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 16:14:20,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348674999] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:14:20,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:14:20,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-12-13 16:14:20,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724272157] [2022-12-13 16:14:20,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:14:20,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 16:14:20,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:14:20,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 16:14:20,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:14:20,765 INFO L87 Difference]: Start difference. First operand 78 states and 98 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 16:14:20,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:14:20,911 INFO L93 Difference]: Finished difference Result 159 states and 210 transitions. [2022-12-13 16:14:20,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 16:14:20,911 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2022-12-13 16:14:20,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:14:20,912 INFO L225 Difference]: With dead ends: 159 [2022-12-13 16:14:20,912 INFO L226 Difference]: Without dead ends: 119 [2022-12-13 16:14:20,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-12-13 16:14:20,913 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 72 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:14:20,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 294 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:14:20,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-12-13 16:14:20,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 87. [2022-12-13 16:14:20,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 68 states have (on average 1.25) internal successors, (85), 71 states have internal predecessors, (85), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-13 16:14:20,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2022-12-13 16:14:20,933 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 45 [2022-12-13 16:14:20,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:14:20,933 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2022-12-13 16:14:20,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 16:14:20,933 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2022-12-13 16:14:20,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-13 16:14:20,934 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:14:20,934 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:14:20,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 16:14:21,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:14:21,135 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:14:21,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:14:21,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1486891216, now seen corresponding path program 1 times [2022-12-13 16:14:21,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:14:21,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494438911] [2022-12-13 16:14:21,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:14:21,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:14:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:21,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:14:21,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:21,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 16:14:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:21,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 16:14:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:21,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 16:14:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:21,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 16:14:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:21,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-12-13 16:14:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 16:14:21,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:14:21,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494438911] [2022-12-13 16:14:21,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494438911] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:14:21,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:14:21,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 16:14:21,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516068478] [2022-12-13 16:14:21,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:14:21,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 16:14:21,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:14:21,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 16:14:21,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:14:21,295 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 16:14:21,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:14:21,462 INFO L93 Difference]: Finished difference Result 106 states and 135 transitions. [2022-12-13 16:14:21,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 16:14:21,463 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2022-12-13 16:14:21,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:14:21,464 INFO L225 Difference]: With dead ends: 106 [2022-12-13 16:14:21,464 INFO L226 Difference]: Without dead ends: 104 [2022-12-13 16:14:21,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-13 16:14:21,464 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 49 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:14:21,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 224 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:14:21,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-13 16:14:21,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2022-12-13 16:14:21,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 79 states have internal predecessors, (94), 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 16:14:21,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 125 transitions. [2022-12-13 16:14:21,486 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 125 transitions. Word has length 48 [2022-12-13 16:14:21,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:14:21,486 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 125 transitions. [2022-12-13 16:14:21,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 16:14:21,487 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 125 transitions. [2022-12-13 16:14:21,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-13 16:14:21,487 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:14:21,487 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:14:21,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 16:14:21,487 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:14:21,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:14:21,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1485044174, now seen corresponding path program 1 times [2022-12-13 16:14:21,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:14:21,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632137900] [2022-12-13 16:14:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:14:21,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:14:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:21,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:14:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:21,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 16:14:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:21,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 16:14:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:21,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 16:14:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:21,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 16:14:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:21,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-12-13 16:14:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 16:14:21,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:14:21,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632137900] [2022-12-13 16:14:21,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632137900] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:14:21,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:14:21,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 16:14:21,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98401509] [2022-12-13 16:14:21,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:14:21,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:14:21,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:14:21,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:14:21,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:14:21,606 INFO L87 Difference]: Start difference. First operand 98 states and 125 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 16:14:21,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:14:21,720 INFO L93 Difference]: Finished difference Result 117 states and 149 transitions. [2022-12-13 16:14:21,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:14:21,720 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2022-12-13 16:14:21,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:14:21,721 INFO L225 Difference]: With dead ends: 117 [2022-12-13 16:14:21,721 INFO L226 Difference]: Without dead ends: 106 [2022-12-13 16:14:21,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:14:21,722 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 25 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:14:21,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 144 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:14:21,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-12-13 16:14:21,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2022-12-13 16:14:21,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 77 states have (on average 1.2467532467532467) internal successors, (96), 81 states have internal predecessors, (96), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-13 16:14:21,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 129 transitions. [2022-12-13 16:14:21,744 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 129 transitions. Word has length 48 [2022-12-13 16:14:21,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:14:21,745 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 129 transitions. [2022-12-13 16:14:21,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 16:14:21,745 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 129 transitions. [2022-12-13 16:14:21,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 16:14:21,745 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:14:21,745 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:14:21,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 16:14:21,746 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:14:21,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:14:21,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2045289640, now seen corresponding path program 1 times [2022-12-13 16:14:21,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:14:21,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132642354] [2022-12-13 16:14:21,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:14:21,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:14:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:21,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:14:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:21,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 16:14:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:21,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 16:14:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:21,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 16:14:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:21,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 16:14:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-13 16:14:21,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:14:21,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132642354] [2022-12-13 16:14:21,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132642354] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:14:21,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571734037] [2022-12-13 16:14:21,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:14:21,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:14:21,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:14:21,928 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:14:21,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 16:14:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:21,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 16:14:22,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:14:22,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 16:14:22,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-13 16:14:22,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 16:14:22,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 16:14:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-13 16:14:22,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:14:22,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:14:22,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-12-13 16:14:22,212 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:14:22,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-12-13 16:14:22,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-13 16:14:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-13 16:14:22,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571734037] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 16:14:22,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:14:22,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 7] total 17 [2022-12-13 16:14:22,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556323731] [2022-12-13 16:14:22,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:14:22,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:14:22,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:14:22,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:14:22,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-12-13 16:14:22,324 INFO L87 Difference]: Start difference. First operand 101 states and 129 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 16:14:22,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:14:22,442 INFO L93 Difference]: Finished difference Result 125 states and 158 transitions. [2022-12-13 16:14:22,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:14:22,442 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2022-12-13 16:14:22,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:14:22,443 INFO L225 Difference]: With dead ends: 125 [2022-12-13 16:14:22,443 INFO L226 Difference]: Without dead ends: 106 [2022-12-13 16:14:22,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-12-13 16:14:22,444 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 48 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:14:22,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 132 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:14:22,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-12-13 16:14:22,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2022-12-13 16:14:22,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 81 states have internal predecessors, (94), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-13 16:14:22,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 127 transitions. [2022-12-13 16:14:22,467 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 127 transitions. Word has length 50 [2022-12-13 16:14:22,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:14:22,467 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 127 transitions. [2022-12-13 16:14:22,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 16:14:22,467 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 127 transitions. [2022-12-13 16:14:22,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 16:14:22,468 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:14:22,468 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:14:22,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 16:14:22,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 16:14:22,668 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:14:22,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:14:22,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1688735023, now seen corresponding path program 4 times [2022-12-13 16:14:22,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:14:22,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787319383] [2022-12-13 16:14:22,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:14:22,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:14:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:25,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:14:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:25,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 16:14:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:25,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 16:14:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:25,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 16:14:25,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-13 16:14:25,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:14:25,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787319383] [2022-12-13 16:14:25,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787319383] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:14:25,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382146595] [2022-12-13 16:14:25,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:14:25,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:14:25,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:14:25,287 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:14:25,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 16:14:25,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:14:25,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:14:25,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-13 16:14:25,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:14:25,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-13 16:14:25,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-12-13 16:14:27,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 73 [2022-12-13 16:14:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 16:14:27,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:14:28,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382146595] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:14:28,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:14:28,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 37 [2022-12-13 16:14:28,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88733833] [2022-12-13 16:14:28,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:14:28,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 16:14:28,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:14:28,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 16:14:28,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2266, Unknown=0, NotChecked=0, Total=2550 [2022-12-13 16:14:28,503 INFO L87 Difference]: Start difference. First operand 101 states and 127 transitions. Second operand has 37 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-13 16:14:35,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:14:35,110 INFO L93 Difference]: Finished difference Result 193 states and 245 transitions. [2022-12-13 16:14:35,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 16:14:35,111 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 51 [2022-12-13 16:14:35,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:14:35,112 INFO L225 Difference]: With dead ends: 193 [2022-12-13 16:14:35,112 INFO L226 Difference]: Without dead ends: 129 [2022-12-13 16:14:35,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1792 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=782, Invalid=5538, Unknown=0, NotChecked=0, Total=6320 [2022-12-13 16:14:35,114 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 143 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-13 16:14:35,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 398 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-13 16:14:35,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-12-13 16:14:35,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 98. [2022-12-13 16:14:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 79 states have internal predecessors, (89), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-13 16:14:35,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2022-12-13 16:14:35,144 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 51 [2022-12-13 16:14:35,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:14:35,144 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2022-12-13 16:14:35,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-13 16:14:35,144 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2022-12-13 16:14:35,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 16:14:35,144 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:14:35,145 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:14:35,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 16:14:35,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 16:14:35,346 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:14:35,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:14:35,347 INFO L85 PathProgramCache]: Analyzing trace with hash 80194579, now seen corresponding path program 1 times [2022-12-13 16:14:35,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:14:35,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563974076] [2022-12-13 16:14:35,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:14:35,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:14:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:35,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:14:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:35,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 16:14:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:35,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 16:14:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:35,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 16:14:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:35,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 16:14:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:35,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-12-13 16:14:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:35,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 16:14:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:35,668 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 16:14:35,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:14:35,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563974076] [2022-12-13 16:14:35,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563974076] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:14:35,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509146352] [2022-12-13 16:14:35,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:14:35,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:14:35,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:14:35,670 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:14:35,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 16:14:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:35,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 16:14:35,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:14:35,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 16:14:35,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:14:35,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-12-13 16:14:35,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-12-13 16:14:35,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 16:14:35,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 16:14:36,078 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:14:36,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-12-13 16:14:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 16:14:36,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:14:36,202 INFO L321 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2022-12-13 16:14:36,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 94 treesize of output 87 [2022-12-13 16:14:36,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:14:36,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 59 [2022-12-13 16:14:36,224 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:14:36,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 183 treesize of output 211 [2022-12-13 16:14:36,245 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:14:36,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 153 treesize of output 167 [2022-12-13 16:14:37,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-12-13 16:14:37,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-12-13 16:14:37,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-12-13 16:14:37,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-13 16:14:37,169 INFO L321 Elim1Store]: treesize reduction 20, result has 64.9 percent of original size [2022-12-13 16:14:37,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 408 treesize of output 417 [2022-12-13 16:14:37,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-12-13 16:14:37,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:14:37,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-13 16:14:37,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-13 16:14:37,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:14:37,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2022-12-13 16:14:37,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:14:37,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-12-13 16:14:37,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:14:37,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 189 treesize of output 187 [2022-12-13 16:14:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 16:14:38,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509146352] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:14:38,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:14:38,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 27 [2022-12-13 16:14:38,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123521263] [2022-12-13 16:14:38,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:14:38,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 16:14:38,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:14:38,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 16:14:38,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-12-13 16:14:38,054 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand has 27 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 26 states have internal predecessors, (52), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2022-12-13 16:14:38,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:14:38,672 INFO L93 Difference]: Finished difference Result 173 states and 204 transitions. [2022-12-13 16:14:38,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 16:14:38,672 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 26 states have internal predecessors, (52), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) Word has length 54 [2022-12-13 16:14:38,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:14:38,673 INFO L225 Difference]: With dead ends: 173 [2022-12-13 16:14:38,673 INFO L226 Difference]: Without dead ends: 169 [2022-12-13 16:14:38,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 16:14:38,675 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 158 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 16:14:38,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 325 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 16:14:38,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-12-13 16:14:38,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 155. [2022-12-13 16:14:38,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 114 states have (on average 1.1228070175438596) internal successors, (128), 120 states have internal predecessors, (128), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (26), 21 states have call predecessors, (26), 26 states have call successors, (26) [2022-12-13 16:14:38,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 182 transitions. [2022-12-13 16:14:38,723 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 182 transitions. Word has length 54 [2022-12-13 16:14:38,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:14:38,723 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 182 transitions. [2022-12-13 16:14:38,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 26 states have internal predecessors, (52), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2022-12-13 16:14:38,724 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 182 transitions. [2022-12-13 16:14:38,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 16:14:38,724 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:14:38,724 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:14:38,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 16:14:38,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:14:38,926 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:14:38,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:14:38,927 INFO L85 PathProgramCache]: Analyzing trace with hash -692170403, now seen corresponding path program 1 times [2022-12-13 16:14:38,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:14:38,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681297567] [2022-12-13 16:14:38,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:14:38,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:14:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:39,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:14:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:39,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 16:14:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:39,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 16:14:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:39,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 16:14:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:39,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 16:14:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:39,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 16:14:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-13 16:14:39,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:14:39,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681297567] [2022-12-13 16:14:39,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681297567] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:14:39,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437308054] [2022-12-13 16:14:39,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:14:39,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:14:39,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:14:39,095 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:14:39,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 16:14:39,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:39,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 16:14:39,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:14:39,272 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-12-13 16:14:39,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-12-13 16:14:39,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 16:14:39,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-12-13 16:14:39,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-12-13 16:14:39,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-12-13 16:14:39,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 16:14:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-13 16:14:39,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:14:39,453 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:14:39,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 226 [2022-12-13 16:14:39,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 258 [2022-12-13 16:14:39,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 254 [2022-12-13 16:14:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-13 16:14:39,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437308054] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:14:39,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:14:39,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2022-12-13 16:14:39,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009953055] [2022-12-13 16:14:39,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:14:39,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 16:14:39,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:14:39,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 16:14:39,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-12-13 16:14:39,663 INFO L87 Difference]: Start difference. First operand 155 states and 182 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-13 16:14:43,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 16:14:43,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:14:43,529 INFO L93 Difference]: Finished difference Result 197 states and 224 transitions. [2022-12-13 16:14:43,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 16:14:43,530 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 57 [2022-12-13 16:14:43,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:14:43,531 INFO L225 Difference]: With dead ends: 197 [2022-12-13 16:14:43,531 INFO L226 Difference]: Without dead ends: 179 [2022-12-13 16:14:43,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-12-13 16:14:43,532 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 98 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 42 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-12-13 16:14:43,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 316 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 269 Invalid, 3 Unknown, 0 Unchecked, 3.7s Time] [2022-12-13 16:14:43,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-12-13 16:14:43,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2022-12-13 16:14:43,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 129 states have (on average 1.1007751937984496) internal successors, (142), 135 states have internal predecessors, (142), 31 states have call successors, (31), 17 states have call predecessors, (31), 16 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-12-13 16:14:43,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 201 transitions. [2022-12-13 16:14:43,581 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 201 transitions. Word has length 57 [2022-12-13 16:14:43,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:14:43,581 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 201 transitions. [2022-12-13 16:14:43,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-13 16:14:43,581 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 201 transitions. [2022-12-13 16:14:43,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-13 16:14:43,582 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:14:43,582 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:14:43,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 16:14:43,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 16:14:43,784 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:14:43,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:14:43,785 INFO L85 PathProgramCache]: Analyzing trace with hash 229495732, now seen corresponding path program 1 times [2022-12-13 16:14:43,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:14:43,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382385608] [2022-12-13 16:14:43,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:14:43,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:14:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:44,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:14:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:44,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 16:14:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:44,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 16:14:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:44,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 16:14:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:44,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 16:14:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:44,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-12-13 16:14:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:44,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 16:14:44,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:44,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 16:14:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-13 16:14:44,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:14:44,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382385608] [2022-12-13 16:14:44,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382385608] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:14:44,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013626659] [2022-12-13 16:14:44,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:14:44,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:14:44,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:14:44,531 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:14:44,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 16:14:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:44,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 110 conjunts are in the unsatisfiable core [2022-12-13 16:14:44,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:14:44,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-13 16:14:44,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-12-13 16:14:44,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 16:14:45,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:14:45,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 52 [2022-12-13 16:14:45,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:14:45,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:14:45,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 52 [2022-12-13 16:14:45,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 16:14:45,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 16:15:17,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:15:17,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:15:17,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:15:17,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:15:17,767 INFO L321 Elim1Store]: treesize reduction 16, result has 82.0 percent of original size [2022-12-13 16:15:17,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 99 treesize of output 151 [2022-12-13 16:15:17,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-12-13 16:15:17,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-12-13 16:15:17,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 96 [2022-12-13 16:15:18,349 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 23 refuted. 2 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-13 16:15:18,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:15:18,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:15:18,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-13 16:15:21,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013626659] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:15:21,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:15:21,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 35 [2022-12-13 16:15:21,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107500192] [2022-12-13 16:15:21,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:15:21,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 16:15:21,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:15:21,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 16:15:21,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1787, Unknown=6, NotChecked=0, Total=1980 [2022-12-13 16:15:21,238 INFO L87 Difference]: Start difference. First operand 177 states and 201 transitions. Second operand has 35 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 9 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 8 states have call successors, (15) [2022-12-13 16:15:24,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 16:15:26,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 16:15:34,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 16:15:35,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:15:35,135 INFO L93 Difference]: Finished difference Result 183 states and 206 transitions. [2022-12-13 16:15:35,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 16:15:35,136 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 9 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 8 states have call successors, (15) Word has length 60 [2022-12-13 16:15:35,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:15:35,137 INFO L225 Difference]: With dead ends: 183 [2022-12-13 16:15:35,137 INFO L226 Difference]: Without dead ends: 129 [2022-12-13 16:15:35,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 41.0s TimeCoverageRelationStatistics Valid=522, Invalid=3630, Unknown=8, NotChecked=0, Total=4160 [2022-12-13 16:15:35,139 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 244 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 105 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-12-13 16:15:35,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 299 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 939 Invalid, 3 Unknown, 0 Unchecked, 7.4s Time] [2022-12-13 16:15:35,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-12-13 16:15:35,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-12-13 16:15:35,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 97 states have (on average 1.1030927835051547) internal successors, (107), 101 states have internal predecessors, (107), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-13 16:15:35,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2022-12-13 16:15:35,178 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 60 [2022-12-13 16:15:35,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:15:35,178 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2022-12-13 16:15:35,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 9 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 8 states have call successors, (15) [2022-12-13 16:15:35,178 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2022-12-13 16:15:35,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-13 16:15:35,178 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:15:35,179 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:15:35,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 16:15:35,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:15:35,380 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:15:35,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:15:35,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1459498899, now seen corresponding path program 1 times [2022-12-13 16:15:35,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:15:35,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942198787] [2022-12-13 16:15:35,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:15:35,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:15:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:35,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:15:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:35,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 16:15:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:35,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 16:15:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:35,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 16:15:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:35,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 16:15:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:35,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 16:15:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:35,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 16:15:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:35,743 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 16:15:35,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:15:35,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942198787] [2022-12-13 16:15:35,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942198787] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:15:35,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771700789] [2022-12-13 16:15:35,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:15:35,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:15:35,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:15:35,745 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:15:35,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 16:15:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:35,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-13 16:15:35,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:15:35,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 16:15:36,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-12-13 16:15:36,321 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:15:36,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-12-13 16:15:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 16:15:36,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:15:36,476 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:15:36,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 706 treesize of output 654 [2022-12-13 16:15:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 16:15:37,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771700789] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:15:37,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:15:37,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 34 [2022-12-13 16:15:37,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125943196] [2022-12-13 16:15:37,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:15:37,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 16:15:37,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:15:37,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 16:15:37,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 16:15:37,036 INFO L87 Difference]: Start difference. First operand 129 states and 147 transitions. Second operand has 34 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 33 states have internal predecessors, (73), 9 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) [2022-12-13 16:15:38,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:15:38,767 INFO L93 Difference]: Finished difference Result 209 states and 245 transitions. [2022-12-13 16:15:38,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 16:15:38,767 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 33 states have internal predecessors, (73), 9 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) Word has length 60 [2022-12-13 16:15:38,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:15:38,768 INFO L225 Difference]: With dead ends: 209 [2022-12-13 16:15:38,768 INFO L226 Difference]: Without dead ends: 159 [2022-12-13 16:15:38,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=466, Invalid=2396, Unknown=0, NotChecked=0, Total=2862 [2022-12-13 16:15:38,769 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 209 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 16:15:38,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 329 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 16:15:38,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-12-13 16:15:38,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 113. [2022-12-13 16:15:38,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 88 states have (on average 1.1704545454545454) internal successors, (103), 92 states have internal predecessors, (103), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-13 16:15:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2022-12-13 16:15:38,807 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 60 [2022-12-13 16:15:38,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:15:38,807 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2022-12-13 16:15:38,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 33 states have internal predecessors, (73), 9 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) [2022-12-13 16:15:38,807 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2022-12-13 16:15:38,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-13 16:15:38,808 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:15:38,808 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:15:38,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 16:15:39,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 16:15:39,009 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:15:39,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:15:39,009 INFO L85 PathProgramCache]: Analyzing trace with hash 855301133, now seen corresponding path program 1 times [2022-12-13 16:15:39,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:15:39,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551769829] [2022-12-13 16:15:39,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:15:39,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:15:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:39,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:15:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:39,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 16:15:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:39,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 16:15:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:39,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 16:15:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:39,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-12-13 16:15:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 44 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-13 16:15:39,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:15:39,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551769829] [2022-12-13 16:15:39,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551769829] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:15:39,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247596283] [2022-12-13 16:15:39,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:15:39,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:15:39,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:15:39,326 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:15:39,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 16:15:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:39,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 16:15:39,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:15:39,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 16:15:39,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-13 16:15:39,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 16:15:39,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-13 16:15:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-13 16:15:39,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:15:39,848 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:15:39,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-12-13 16:15:39,854 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:15:39,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2022-12-13 16:15:39,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-13 16:15:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-13 16:15:40,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247596283] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:15:40,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:15:40,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 16] total 35 [2022-12-13 16:15:40,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147655830] [2022-12-13 16:15:40,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:15:40,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 16:15:40,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:15:40,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 16:15:40,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 16:15:40,182 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 35 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 33 states have internal predecessors, (83), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 16:15:41,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:15:41,205 INFO L93 Difference]: Finished difference Result 176 states and 217 transitions. [2022-12-13 16:15:41,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 16:15:41,205 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 33 states have internal predecessors, (83), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 62 [2022-12-13 16:15:41,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:15:41,206 INFO L225 Difference]: With dead ends: 176 [2022-12-13 16:15:41,206 INFO L226 Difference]: Without dead ends: 174 [2022-12-13 16:15:41,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=698, Invalid=2382, Unknown=0, NotChecked=0, Total=3080 [2022-12-13 16:15:41,207 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 154 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 16:15:41,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 362 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 16:15:41,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-12-13 16:15:41,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 90. [2022-12-13 16:15:41,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 71 states have internal predecessors, (78), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-13 16:15:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 103 transitions. [2022-12-13 16:15:41,239 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 103 transitions. Word has length 62 [2022-12-13 16:15:41,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:15:41,240 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 103 transitions. [2022-12-13 16:15:41,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 33 states have internal predecessors, (83), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 16:15:41,240 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 103 transitions. [2022-12-13 16:15:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-13 16:15:41,240 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:15:41,240 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:15:41,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 16:15:41,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 16:15:41,442 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:15:41,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:15:41,443 INFO L85 PathProgramCache]: Analyzing trace with hash -589711777, now seen corresponding path program 1 times [2022-12-13 16:15:41,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:15:41,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780254908] [2022-12-13 16:15:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:15:41,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:15:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:42,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:15:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:42,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 16:15:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:42,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 16:15:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:42,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 16:15:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:42,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 16:15:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:42,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 16:15:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:42,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-12-13 16:15:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:42,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-12-13 16:15:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:15:42,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:15:42,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780254908] [2022-12-13 16:15:42,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780254908] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:15:42,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895893179] [2022-12-13 16:15:42,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:15:42,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:15:42,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:15:42,954 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:15:42,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 16:15:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:43,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 130 conjunts are in the unsatisfiable core [2022-12-13 16:15:43,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:15:43,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-13 16:15:43,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-12-13 16:15:43,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 16:15:45,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:15:45,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 74 [2022-12-13 16:15:45,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:15:45,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:15:45,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 43 [2022-12-13 16:15:45,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 16:15:45,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 16:15:49,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:15:49,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:15:49,523 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:15:49,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 55 [2022-12-13 16:15:49,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-12-13 16:15:49,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-12-13 16:16:00,885 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 16:16:00,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:16:02,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:16:02,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-13 16:16:03,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895893179] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:16:03,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:16:03,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 31] total 44 [2022-12-13 16:16:03,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568209970] [2022-12-13 16:16:03,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:16:03,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 16:16:03,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:16:03,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 16:16:03,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=3383, Unknown=5, NotChecked=0, Total=3782 [2022-12-13 16:16:03,240 INFO L87 Difference]: Start difference. First operand 90 states and 103 transitions. Second operand has 44 states, 38 states have (on average 1.868421052631579) internal successors, (71), 41 states have internal predecessors, (71), 11 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2022-12-13 16:16:05,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 16:16:07,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 16:16:09,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 16:16:21,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 16:16:25,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:16:25,031 INFO L93 Difference]: Finished difference Result 131 states and 143 transitions. [2022-12-13 16:16:25,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 16:16:25,031 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 38 states have (on average 1.868421052631579) internal successors, (71), 41 states have internal predecessors, (71), 11 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) Word has length 69 [2022-12-13 16:16:25,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:16:25,032 INFO L225 Difference]: With dead ends: 131 [2022-12-13 16:16:25,032 INFO L226 Difference]: Without dead ends: 71 [2022-12-13 16:16:25,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2571 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=1062, Invalid=7489, Unknown=5, NotChecked=0, Total=8556 [2022-12-13 16:16:25,037 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 147 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 82 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-12-13 16:16:25,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 315 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1353 Invalid, 4 Unknown, 0 Unchecked, 11.5s Time] [2022-12-13 16:16:25,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-13 16:16:25,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2022-12-13 16:16:25,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 16:16:25,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-12-13 16:16:25,061 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 69 [2022-12-13 16:16:25,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:16:25,061 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-12-13 16:16:25,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 38 states have (on average 1.868421052631579) internal successors, (71), 41 states have internal predecessors, (71), 11 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2022-12-13 16:16:25,062 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-12-13 16:16:25,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 16:16:25,062 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:16:25,062 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:16:25,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 16:16:25,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 16:16:25,264 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:16:25,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:16:25,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1913317232, now seen corresponding path program 1 times [2022-12-13 16:16:25,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:16:25,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386140320] [2022-12-13 16:16:25,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:16:25,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:16:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:25,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:16:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:25,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 16:16:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:25,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 16:16:25,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:25,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 16:16:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:25,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-12-13 16:16:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:25,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-12-13 16:16:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:25,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-12-13 16:16:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 16:16:25,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:16:25,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386140320] [2022-12-13 16:16:25,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386140320] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:16:25,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170865520] [2022-12-13 16:16:25,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:16:25,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:16:25,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:16:25,396 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:16:25,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 16:16:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:25,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 16:16:25,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:16:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-13 16:16:25,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:16:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 34 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-13 16:16:25,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170865520] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:16:25,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:16:25,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-12-13 16:16:25,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222188422] [2022-12-13 16:16:25,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:16:25,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 16:16:25,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:16:25,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 16:16:25,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-13 16:16:25,570 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-13 16:16:25,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:16:25,737 INFO L93 Difference]: Finished difference Result 141 states and 155 transitions. [2022-12-13 16:16:25,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 16:16:25,738 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 75 [2022-12-13 16:16:25,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:16:25,738 INFO L225 Difference]: With dead ends: 141 [2022-12-13 16:16:25,739 INFO L226 Difference]: Without dead ends: 87 [2022-12-13 16:16:25,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 155 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2022-12-13 16:16:25,739 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 24 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:16:25,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 329 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:16:25,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-12-13 16:16:25,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2022-12-13 16:16:25,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 16:16:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2022-12-13 16:16:25,761 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 75 [2022-12-13 16:16:25,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:16:25,762 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2022-12-13 16:16:25,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-13 16:16:25,762 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2022-12-13 16:16:25,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-13 16:16:25,762 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:16:25,762 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:16:25,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-13 16:16:25,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:16:25,964 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:16:25,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:16:25,965 INFO L85 PathProgramCache]: Analyzing trace with hash -264875332, now seen corresponding path program 2 times [2022-12-13 16:16:25,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:16:25,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16210441] [2022-12-13 16:16:25,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:16:25,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:16:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:26,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:16:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:26,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 16:16:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:26,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 16:16:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:26,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 16:16:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:26,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-12-13 16:16:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:26,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-12-13 16:16:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:26,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-12-13 16:16:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 26 proven. 66 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 16:16:26,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:16:26,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16210441] [2022-12-13 16:16:26,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16210441] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:16:26,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561960709] [2022-12-13 16:16:26,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:16:26,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:16:26,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:16:26,110 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:16:26,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 16:16:26,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:16:26,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:16:26,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 16:16:26,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:16:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-13 16:16:26,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:16:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 26 proven. 66 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 16:16:26,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561960709] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:16:26,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:16:26,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2022-12-13 16:16:26,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702297291] [2022-12-13 16:16:26,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:16:26,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 16:16:26,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:16:26,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 16:16:26,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:16:26,284 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-13 16:16:26,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:16:26,440 INFO L93 Difference]: Finished difference Result 156 states and 171 transitions. [2022-12-13 16:16:26,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 16:16:26,440 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 78 [2022-12-13 16:16:26,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:16:26,441 INFO L225 Difference]: With dead ends: 156 [2022-12-13 16:16:26,441 INFO L226 Difference]: Without dead ends: 103 [2022-12-13 16:16:26,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 159 SyntacticMatches, 11 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-12-13 16:16:26,441 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 33 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:16:26,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 273 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:16:26,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-12-13 16:16:26,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 79. [2022-12-13 16:16:26,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 16:16:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2022-12-13 16:16:26,466 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 78 [2022-12-13 16:16:26,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:16:26,467 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2022-12-13 16:16:26,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-13 16:16:26,467 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2022-12-13 16:16:26,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-13 16:16:26,467 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:16:26,467 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:16:26,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-13 16:16:26,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:16:26,669 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:16:26,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:16:26,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1861325808, now seen corresponding path program 3 times [2022-12-13 16:16:26,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:16:26,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297187931] [2022-12-13 16:16:26,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:16:26,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:16:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:27,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:16:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:27,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 16:16:27,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:27,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 16:16:27,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:27,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 16:16:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:27,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-12-13 16:16:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:27,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-12-13 16:16:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:27,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-12-13 16:16:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 79 proven. 7 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-13 16:16:27,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:16:27,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297187931] [2022-12-13 16:16:27,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297187931] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:16:27,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469500135] [2022-12-13 16:16:27,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:16:27,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:16:27,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:16:27,079 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:16:27,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 16:16:27,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 16:16:27,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:16:27,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 16:16:27,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:16:27,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 16:16:27,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:16:27,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-12-13 16:16:27,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 16:16:27,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-13 16:16:27,884 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:16:27,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2022-12-13 16:16:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 80 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-13 16:16:27,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:16:28,002 INFO L321 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2022-12-13 16:16:28,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 92 treesize of output 84 [2022-12-13 16:16:28,009 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:16:28,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-12-13 16:16:28,031 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:16:28,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 182 treesize of output 210 [2022-12-13 16:16:28,054 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:16:28,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 158 [2022-12-13 16:16:28,128 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:16:28,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-12-13 16:16:28,147 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 16:16:28,515 INFO L321 Elim1Store]: treesize reduction 5, result has 16.7 percent of original size [2022-12-13 16:16:28,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 1 [2022-12-13 16:16:28,541 INFO L321 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2022-12-13 16:16:28,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 182 treesize of output 1 [2022-12-13 16:16:28,600 INFO L321 Elim1Store]: treesize reduction 5, result has 16.7 percent of original size [2022-12-13 16:16:28,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 1 [2022-12-13 16:16:28,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 192 [2022-12-13 16:16:28,769 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:16:28,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 154 [2022-12-13 16:16:29,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:16:29,555 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 16:16:29,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 1 [2022-12-13 16:16:29,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:16:29,574 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:16:29,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 167 [2022-12-13 16:16:29,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:16:29,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 145 [2022-12-13 16:16:29,707 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:16:29,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 352 treesize of output 316 [2022-12-13 16:16:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-13 16:16:30,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469500135] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 16:16:30,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:16:30,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [15, 14] total 31 [2022-12-13 16:16:30,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740218893] [2022-12-13 16:16:30,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:16:30,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 16:16:30,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:16:30,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 16:16:30,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-12-13 16:16:30,895 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 11 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 16:16:31,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:16:31,035 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2022-12-13 16:16:31,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 16:16:31,036 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2022-12-13 16:16:31,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:16:31,036 INFO L225 Difference]: With dead ends: 79 [2022-12-13 16:16:31,036 INFO L226 Difference]: Without dead ends: 0 [2022-12-13 16:16:31,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 154 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 16:16:31,038 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 36 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:16:31,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 168 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:16:31,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-13 16:16:31,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-13 16:16:31,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:16:31,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-13 16:16:31,039 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 81 [2022-12-13 16:16:31,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:16:31,039 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-13 16:16:31,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 16:16:31,039 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-13 16:16:31,039 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-13 16:16:31,041 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-13 16:16:31,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 16:16:31,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77148333-540b-4eba-a68a-86ea44dff949/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:16:31,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-12-13 16:26:58,110 WARN L233 SmtUtils]: Spent 10.38m on a formula simplification. DAG size of input: 322 DAG size of output: 322 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-12-13 16:28:08,935 WARN L233 SmtUtils]: Spent 1.18m on a formula simplification. DAG size of input: 326 DAG size of output: 316 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)