./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e6c0909fc593366247feb227b85c6733aa1dfc9c572e69f3a5aa951fa82d0326 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:37:26,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:37:26,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:37:26,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:37:26,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:37:26,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:37:26,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:37:26,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:37:26,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:37:26,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:37:26,977 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:37:26,979 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:37:26,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:37:26,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:37:26,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:37:26,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:37:26,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:37:26,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:37:26,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:37:27,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:37:27,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:37:27,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:37:27,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:37:27,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:37:27,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:37:27,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:37:27,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:37:27,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:37:27,024 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:37:27,025 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:37:27,025 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:37:27,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:37:27,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:37:27,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:37:27,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:37:27,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:37:27,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:37:27,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:37:27,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:37:27,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:37:27,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:37:27,036 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:37:27,068 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:37:27,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:37:27,072 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:37:27,072 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:37:27,074 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:37:27,074 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:37:27,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:37:27,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:37:27,075 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:37:27,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:37:27,077 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:37:27,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:37:27,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:37:27,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:37:27,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:37:27,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:37:27,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:37:27,078 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:37:27,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:37:27,079 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:37:27,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:37:27,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:37:27,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:37:27,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:37:27,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:37:27,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:37:27,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:37:27,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:37:27,081 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:37:27,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:37:27,081 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:37:27,081 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:37:27,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:37:27,082 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6c0909fc593366247feb227b85c6733aa1dfc9c572e69f3a5aa951fa82d0326 [2022-11-16 11:37:27,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:37:27,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:37:27,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:37:27,399 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:37:27,400 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:37:27,402 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/array-crafted/zero_sum_const5.c [2022-11-16 11:37:27,481 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/data/869e5aa00/ad8c9525f7c344cd873852254805d53b/FLAGf5e7ae7bf [2022-11-16 11:37:28,062 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:37:28,067 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/sv-benchmarks/c/array-crafted/zero_sum_const5.c [2022-11-16 11:37:28,077 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/data/869e5aa00/ad8c9525f7c344cd873852254805d53b/FLAGf5e7ae7bf [2022-11-16 11:37:28,390 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/data/869e5aa00/ad8c9525f7c344cd873852254805d53b [2022-11-16 11:37:28,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:37:28,395 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:37:28,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:37:28,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:37:28,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:37:28,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:37:28" (1/1) ... [2022-11-16 11:37:28,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@92c0cfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:28, skipping insertion in model container [2022-11-16 11:37:28,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:37:28" (1/1) ... [2022-11-16 11:37:28,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:37:28,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:37:28,612 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/sv-benchmarks/c/array-crafted/zero_sum_const5.c[406,419] [2022-11-16 11:37:28,669 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:37:28,686 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:37:28,703 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/sv-benchmarks/c/array-crafted/zero_sum_const5.c[406,419] [2022-11-16 11:37:28,737 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:37:28,762 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:37:28,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:28 WrapperNode [2022-11-16 11:37:28,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:37:28,765 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:37:28,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:37:28,765 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:37:28,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:28" (1/1) ... [2022-11-16 11:37:28,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:28" (1/1) ... [2022-11-16 11:37:28,836 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 148 [2022-11-16 11:37:28,839 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:37:28,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:37:28,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:37:28,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:37:28,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:28" (1/1) ... [2022-11-16 11:37:28,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:28" (1/1) ... [2022-11-16 11:37:28,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:28" (1/1) ... [2022-11-16 11:37:28,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:28" (1/1) ... [2022-11-16 11:37:28,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:28" (1/1) ... [2022-11-16 11:37:28,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:28" (1/1) ... [2022-11-16 11:37:28,892 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:28" (1/1) ... [2022-11-16 11:37:28,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:28" (1/1) ... [2022-11-16 11:37:28,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:37:28,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:37:28,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:37:28,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:37:28,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:28" (1/1) ... [2022-11-16 11:37:28,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:37:28,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:28,940 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:37:28,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:37:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:37:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:37:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:37:28,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:37:28,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:37:28,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:37:28,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:37:29,105 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:37:29,107 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:37:29,412 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:37:29,419 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:37:29,424 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-16 11:37:29,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:37:29 BoogieIcfgContainer [2022-11-16 11:37:29,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:37:29,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:37:29,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:37:29,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:37:29,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:37:28" (1/3) ... [2022-11-16 11:37:29,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d34cf75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:37:29, skipping insertion in model container [2022-11-16 11:37:29,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:28" (2/3) ... [2022-11-16 11:37:29,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d34cf75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:37:29, skipping insertion in model container [2022-11-16 11:37:29,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:37:29" (3/3) ... [2022-11-16 11:37:29,454 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const5.c [2022-11-16 11:37:29,493 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:37:29,494 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:37:29,565 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:37:29,574 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;@13172066, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:37:29,574 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:37:29,579 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:29,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 11:37:29,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:29,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:29,590 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:37:29,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:29,597 INFO L85 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2022-11-16 11:37:29,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:29,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363581720] [2022-11-16 11:37:29,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:29,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:29,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:29,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363581720] [2022-11-16 11:37:29,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363581720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:29,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:29,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:29,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793881366] [2022-11-16 11:37:29,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:29,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:37:29,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:29,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:37:29,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:37:29,924 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:29,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:29,966 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2022-11-16 11:37:29,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:37:29,969 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-16 11:37:29,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:29,982 INFO L225 Difference]: With dead ends: 83 [2022-11-16 11:37:29,982 INFO L226 Difference]: Without dead ends: 39 [2022-11-16 11:37:29,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:37:29,993 INFO L413 NwaCegarLoop]: 55 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, 55 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:29,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:37:30,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-16 11:37:30,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-16 11:37:30,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:30,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2022-11-16 11:37:30,057 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2022-11-16 11:37:30,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:30,057 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2022-11-16 11:37:30,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:30,059 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2022-11-16 11:37:30,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 11:37:30,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:30,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:30,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:37:30,063 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:37:30,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:30,064 INFO L85 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2022-11-16 11:37:30,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:30,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149681047] [2022-11-16 11:37:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:30,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:30,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:30,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149681047] [2022-11-16 11:37:30,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149681047] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:30,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:30,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:37:30,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998051091] [2022-11-16 11:37:30,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:30,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:37:30,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:30,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:37:30,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:37:30,247 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:30,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:30,344 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2022-11-16 11:37:30,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:37:30,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-16 11:37:30,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:30,346 INFO L225 Difference]: With dead ends: 75 [2022-11-16 11:37:30,346 INFO L226 Difference]: Without dead ends: 41 [2022-11-16 11:37:30,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:37:30,348 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:30,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:37:30,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-16 11:37:30,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-11-16 11:37:30,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:30,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-11-16 11:37:30,358 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2022-11-16 11:37:30,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:30,358 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-11-16 11:37:30,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:30,359 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-11-16 11:37:30,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 11:37:30,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:30,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:30,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:37:30,361 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:37:30,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:30,362 INFO L85 PathProgramCache]: Analyzing trace with hash 479992254, now seen corresponding path program 1 times [2022-11-16 11:37:30,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:30,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342912395] [2022-11-16 11:37:30,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:30,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:37:30,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:30,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342912395] [2022-11-16 11:37:30,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342912395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:30,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:30,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:37:30,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070084456] [2022-11-16 11:37:30,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:30,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:37:30,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:30,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:37:30,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:30,555 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:30,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:30,721 INFO L93 Difference]: Finished difference Result 92 states and 120 transitions. [2022-11-16 11:37:30,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:37:30,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-16 11:37:30,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:30,723 INFO L225 Difference]: With dead ends: 92 [2022-11-16 11:37:30,723 INFO L226 Difference]: Without dead ends: 61 [2022-11-16 11:37:30,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:30,726 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 74 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:30,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 19 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:37:30,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-16 11:37:30,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2022-11-16 11:37:30,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:30,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-11-16 11:37:30,737 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 29 [2022-11-16 11:37:30,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:30,737 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-11-16 11:37:30,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:30,738 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-11-16 11:37:30,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-16 11:37:30,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:30,740 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:30,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:37:30,740 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:37:30,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:30,741 INFO L85 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2022-11-16 11:37:30,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:30,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833121448] [2022-11-16 11:37:30,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:30,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:31,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:37:31,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:31,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833121448] [2022-11-16 11:37:31,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833121448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:31,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469506317] [2022-11-16 11:37:31,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:31,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:31,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:31,038 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:31,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:37:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:31,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:37:31,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:37:31,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:37:31,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469506317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:31,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:31,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-16 11:37:31,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598757624] [2022-11-16 11:37:31,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:31,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:37:31,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:31,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:37:31,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:37:31,328 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:31,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:31,533 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2022-11-16 11:37:31,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:37:31,534 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-16 11:37:31,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:31,534 INFO L225 Difference]: With dead ends: 97 [2022-11-16 11:37:31,535 INFO L226 Difference]: Without dead ends: 53 [2022-11-16 11:37:31,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:37:31,536 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:31,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 49 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:37:31,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-16 11:37:31,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-11-16 11:37:31,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:31,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2022-11-16 11:37:31,545 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2022-11-16 11:37:31,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:31,545 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2022-11-16 11:37:31,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:31,546 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2022-11-16 11:37:31,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-16 11:37:31,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:31,547 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:31,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 11:37:31,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:31,753 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:37:31,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:31,754 INFO L85 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2022-11-16 11:37:31,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:31,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248597831] [2022-11-16 11:37:31,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:31,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 11:37:31,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:31,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248597831] [2022-11-16 11:37:31,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248597831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:31,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873527704] [2022-11-16 11:37:31,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:37:31,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:31,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:31,932 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:31,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:37:32,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:37:32,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:32,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:37:32,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 11:37:32,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 11:37:32,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873527704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:32,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:32,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-16 11:37:32,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651313852] [2022-11-16 11:37:32,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:32,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:37:32,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:32,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:37:32,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:37:32,236 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:32,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:32,505 INFO L93 Difference]: Finished difference Result 123 states and 151 transitions. [2022-11-16 11:37:32,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:37:32,506 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-16 11:37:32,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:32,513 INFO L225 Difference]: With dead ends: 123 [2022-11-16 11:37:32,514 INFO L226 Difference]: Without dead ends: 83 [2022-11-16 11:37:32,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:37:32,518 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:32,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 22 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:37:32,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-16 11:37:32,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2022-11-16 11:37:32,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-11-16 11:37:32,543 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2022-11-16 11:37:32,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:32,543 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-11-16 11:37:32,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:32,545 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-11-16 11:37:32,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 11:37:32,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:32,552 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:32,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 11:37:32,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:32,759 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:37:32,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:32,761 INFO L85 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2022-11-16 11:37:32,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:32,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390121271] [2022-11-16 11:37:32,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:32,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:40,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:40,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390121271] [2022-11-16 11:37:40,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390121271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:40,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53160450] [2022-11-16 11:37:40,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:37:40,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:40,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:40,368 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:40,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:37:40,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:37:40,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:40,494 WARN L261 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-16 11:37:40,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:43,211 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:37:43,212 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 17 treesize of output 18 [2022-11-16 11:37:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:43,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:52,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:37:52,043 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 37 treesize of output 76 [2022-11-16 11:37:52,528 INFO L321 Elim1Store]: treesize reduction 58, result has 13.4 percent of original size [2022-11-16 11:37:52,528 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 36 treesize of output 17 [2022-11-16 11:37:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:55,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53160450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:55,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:55,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 29] total 62 [2022-11-16 11:37:55,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003164455] [2022-11-16 11:37:55,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:55,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-16 11:37:55,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:55,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-16 11:37:55,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=3406, Unknown=1, NotChecked=0, Total=3782 [2022-11-16 11:37:55,798 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 62 states, 62 states have (on average 3.306451612903226) internal successors, (205), 62 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:05,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:38:05,886 INFO L93 Difference]: Finished difference Result 198 states and 228 transitions. [2022-11-16 11:38:05,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-16 11:38:05,887 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.306451612903226) internal successors, (205), 62 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-16 11:38:05,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:38:05,890 INFO L225 Difference]: With dead ends: 198 [2022-11-16 11:38:05,890 INFO L226 Difference]: Without dead ends: 192 [2022-11-16 11:38:05,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 109 SyntacticMatches, 44 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4028 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=1105, Invalid=10024, Unknown=1, NotChecked=0, Total=11130 [2022-11-16 11:38:05,895 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 122 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1262 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:38:05,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 129 Invalid, 1903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 555 Invalid, 0 Unknown, 1262 Unchecked, 0.5s Time] [2022-11-16 11:38:05,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-16 11:38:05,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 125. [2022-11-16 11:38:05,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 124 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2022-11-16 11:38:05,923 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 71 [2022-11-16 11:38:05,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:38:05,924 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2022-11-16 11:38:05,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.306451612903226) internal successors, (205), 62 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:05,925 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2022-11-16 11:38:05,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 11:38:05,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:38:05,926 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:05,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:06,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:06,132 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:38:06,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:06,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1767165226, now seen corresponding path program 4 times [2022-11-16 11:38:06,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:06,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218588136] [2022-11-16 11:38:06,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:06,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 11:38:06,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:06,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218588136] [2022-11-16 11:38:06,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218588136] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:06,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172805093] [2022-11-16 11:38:06,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:38:06,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:06,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:06,342 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:06,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:38:06,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:38:06,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:38:06,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:38:06,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 11:38:06,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:06,697 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 11:38:06,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172805093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:06,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:06,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-16 11:38:06,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646931485] [2022-11-16 11:38:06,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:06,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:38:06,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:06,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:38:06,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:38:06,703 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:07,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:38:07,292 INFO L93 Difference]: Finished difference Result 289 states and 334 transitions. [2022-11-16 11:38:07,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:38:07,293 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-16 11:38:07,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:38:07,294 INFO L225 Difference]: With dead ends: 289 [2022-11-16 11:38:07,295 INFO L226 Difference]: Without dead ends: 168 [2022-11-16 11:38:07,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 136 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:38:07,296 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 184 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:38:07,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 43 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:38:07,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-16 11:38:07,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 140. [2022-11-16 11:38:07,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1366906474820144) internal successors, (158), 139 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:07,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 158 transitions. [2022-11-16 11:38:07,321 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 158 transitions. Word has length 73 [2022-11-16 11:38:07,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:38:07,322 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 158 transitions. [2022-11-16 11:38:07,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:07,322 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 158 transitions. [2022-11-16 11:38:07,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-16 11:38:07,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:38:07,327 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:07,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:07,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:07,533 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:38:07,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:07,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1072452492, now seen corresponding path program 5 times [2022-11-16 11:38:07,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:07,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782066360] [2022-11-16 11:38:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:07,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-16 11:38:07,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:07,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782066360] [2022-11-16 11:38:07,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782066360] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:07,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938795342] [2022-11-16 11:38:07,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:38:07,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:07,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:07,732 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:07,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:38:07,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 11:38:07,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:38:07,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:38:07,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-16 11:38:08,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-16 11:38:08,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938795342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:08,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:08,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-16 11:38:08,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432219317] [2022-11-16 11:38:08,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:08,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:38:08,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:08,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:38:08,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:38:08,178 INFO L87 Difference]: Start difference. First operand 140 states and 158 transitions. Second operand has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:08,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:38:08,630 INFO L93 Difference]: Finished difference Result 156 states and 174 transitions. [2022-11-16 11:38:08,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:38:08,630 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-11-16 11:38:08,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:38:08,631 INFO L225 Difference]: With dead ends: 156 [2022-11-16 11:38:08,631 INFO L226 Difference]: Without dead ends: 104 [2022-11-16 11:38:08,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 141 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:38:08,633 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 179 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:38:08,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 31 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:38:08,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-16 11:38:08,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2022-11-16 11:38:08,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.118279569892473) internal successors, (104), 93 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:08,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2022-11-16 11:38:08,645 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 75 [2022-11-16 11:38:08,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:38:08,646 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2022-11-16 11:38:08,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:08,646 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2022-11-16 11:38:08,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-16 11:38:08,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:38:08,647 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:08,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:08,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 11:38:08,855 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:38:08,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:08,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1413596990, now seen corresponding path program 6 times [2022-11-16 11:38:08,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:08,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622682712] [2022-11-16 11:38:08,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:08,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:25,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:25,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622682712] [2022-11-16 11:38:25,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622682712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:25,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426547699] [2022-11-16 11:38:25,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:38:25,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:25,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:25,807 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:25,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:38:25,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-16 11:38:25,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:38:25,925 WARN L261 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 150 conjunts are in the unsatisfiable core [2022-11-16 11:38:25,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:25,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:38:26,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-16 11:38:37,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:38:37,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:38:37,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:38:37,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:38:37,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:38:37,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:38:37,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:38:37,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:38:37,985 INFO L321 Elim1Store]: treesize reduction 65, result has 43.0 percent of original size [2022-11-16 11:38:37,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 65 treesize of output 65 [2022-11-16 11:38:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:38,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:34,915 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 100 treesize of output 92 [2022-11-16 11:44:34,976 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:44:34,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7969 treesize of output 6553 [2022-11-16 11:44:39,831 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 99 treesize of output 91 [2022-11-16 11:44:39,879 INFO L321 Elim1Store]: treesize reduction 48, result has 15.8 percent of original size [2022-11-16 11:44:39,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6626 treesize of output 5162 [2022-11-16 11:46:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 1 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:46:13,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426547699] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:46:13,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:46:13,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 45, 60] total 157 [2022-11-16 11:46:13,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655015141] [2022-11-16 11:46:13,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:46:13,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2022-11-16 11:46:13,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:13,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2022-11-16 11:46:13,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1651, Invalid=22766, Unknown=75, NotChecked=0, Total=24492 [2022-11-16 11:46:13,674 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 157 states, 157 states have (on average 1.7006369426751593) internal successors, (267), 157 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:58,200 WARN L233 SmtUtils]: Spent 8.49s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:47:31,266 WARN L233 SmtUtils]: Spent 10.11s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:48:18,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:18,540 INFO L93 Difference]: Finished difference Result 256 states and 286 transitions. [2022-11-16 11:48:18,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-11-16 11:48:18,541 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 1.7006369426751593) internal successors, (267), 157 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-11-16 11:48:18,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:18,543 INFO L225 Difference]: With dead ends: 256 [2022-11-16 11:48:18,543 INFO L226 Difference]: Without dead ends: 250 [2022-11-16 11:48:18,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 75 SyntacticMatches, 38 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16375 ImplicationChecksByTransitivity, 494.3s TimeCoverageRelationStatistics Valid=2207, Invalid=33227, Unknown=98, NotChecked=0, Total=35532 [2022-11-16 11:48:18,557 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 2003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1551 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:18,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 251 Invalid, 2003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 444 Invalid, 0 Unknown, 1551 Unchecked, 0.6s Time] [2022-11-16 11:48:18,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-16 11:48:18,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 163. [2022-11-16 11:48:18,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.123456790123457) internal successors, (182), 162 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:48:18,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 182 transitions. [2022-11-16 11:48:18,621 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 182 transitions. Word has length 93 [2022-11-16 11:48:18,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:18,622 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 182 transitions. [2022-11-16 11:48:18,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 157 states have (on average 1.7006369426751593) internal successors, (267), 157 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:48:18,623 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 182 transitions. [2022-11-16 11:48:18,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-16 11:48:18,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:18,624 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:18,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:18,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:18,831 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:48:18,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:18,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1592040608, now seen corresponding path program 7 times [2022-11-16 11:48:18,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:18,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828470616] [2022-11-16 11:48:18,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:18,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-16 11:48:19,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:19,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828470616] [2022-11-16 11:48:19,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828470616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:48:19,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414274270] [2022-11-16 11:48:19,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:48:19,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:19,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:19,139 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:19,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:48:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:19,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:48:19,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-16 11:48:19,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:48:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-16 11:48:19,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414274270] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:48:19,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:48:19,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-16 11:48:19,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677182683] [2022-11-16 11:48:19,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:48:19,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 11:48:19,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:19,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 11:48:19,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:48:19,684 INFO L87 Difference]: Start difference. First operand 163 states and 182 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:48:20,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:20,514 INFO L93 Difference]: Finished difference Result 365 states and 410 transitions. [2022-11-16 11:48:20,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:48:20,515 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-11-16 11:48:20,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:20,517 INFO L225 Difference]: With dead ends: 365 [2022-11-16 11:48:20,517 INFO L226 Difference]: Without dead ends: 206 [2022-11-16 11:48:20,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 176 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:48:20,520 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 225 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:20,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 50 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:48:20,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-16 11:48:20,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 178. [2022-11-16 11:48:20,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.1073446327683616) internal successors, (196), 177 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:48:20,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 196 transitions. [2022-11-16 11:48:20,550 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 196 transitions. Word has length 95 [2022-11-16 11:48:20,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:20,550 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 196 transitions. [2022-11-16 11:48:20,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:48:20,551 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 196 transitions. [2022-11-16 11:48:20,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-16 11:48:20,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:20,551 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:20,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:20,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:48:20,752 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:48:20,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:20,753 INFO L85 PathProgramCache]: Analyzing trace with hash -345123774, now seen corresponding path program 8 times [2022-11-16 11:48:20,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:20,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499765674] [2022-11-16 11:48:20,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:20,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-16 11:48:21,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:21,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499765674] [2022-11-16 11:48:21,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499765674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:48:21,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815062486] [2022-11-16 11:48:21,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:48:21,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:21,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:21,016 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:21,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:48:21,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:48:21,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:48:21,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:48:21,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-16 11:48:21,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:48:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-16 11:48:21,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815062486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:48:21,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:48:21,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-16 11:48:21,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730572201] [2022-11-16 11:48:21,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:48:21,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 11:48:21,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:21,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 11:48:21,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:48:21,489 INFO L87 Difference]: Start difference. First operand 178 states and 196 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:48:22,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:22,279 INFO L93 Difference]: Finished difference Result 194 states and 212 transitions. [2022-11-16 11:48:22,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:48:22,280 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2022-11-16 11:48:22,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:22,281 INFO L225 Difference]: With dead ends: 194 [2022-11-16 11:48:22,281 INFO L226 Difference]: Without dead ends: 126 [2022-11-16 11:48:22,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 180 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:48:22,282 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 217 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:22,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 33 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:48:22,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-16 11:48:22,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2022-11-16 11:48:22,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0956521739130434) internal successors, (126), 115 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:48:22,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2022-11-16 11:48:22,302 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 97 [2022-11-16 11:48:22,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:22,302 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2022-11-16 11:48:22,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:48:22,303 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2022-11-16 11:48:22,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-16 11:48:22,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:22,304 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-16 11:48:22,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:22,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:48:22,510 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:48:22,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:22,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1433123212, now seen corresponding path program 9 times [2022-11-16 11:48:22,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:22,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710487108] [2022-11-16 11:48:22,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:22,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:48:47,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:47,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710487108] [2022-11-16 11:48:47,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710487108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:48:47,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640325905] [2022-11-16 11:48:47,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:48:47,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:47,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:47,016 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:47,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:48:47,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 11:48:47,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:48:47,171 WARN L261 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 187 conjunts are in the unsatisfiable core [2022-11-16 11:48:47,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:47,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:49:09,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:49:09,642 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:49:09,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 47 [2022-11-16 11:49:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 7 proven. 160 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:49:10,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 167 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:49:28,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640325905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:49:28,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:49:28,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 26, 21] total 113 [2022-11-16 11:49:28,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244310117] [2022-11-16 11:49:28,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:28,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-11-16 11:49:28,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:28,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-11-16 11:49:28,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=682, Invalid=11972, Unknown=2, NotChecked=0, Total=12656 [2022-11-16 11:49:28,470 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 113 states, 113 states have (on average 2.911504424778761) internal successors, (329), 113 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:08,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:08,284 INFO L93 Difference]: Finished difference Result 249 states and 273 transitions. [2022-11-16 11:50:08,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-11-16 11:50:08,285 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.911504424778761) internal successors, (329), 113 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-11-16 11:50:08,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:08,288 INFO L225 Difference]: With dead ends: 249 [2022-11-16 11:50:08,288 INFO L226 Difference]: Without dead ends: 245 [2022-11-16 11:50:08,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 168 SyntacticMatches, 60 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 13539 ImplicationChecksByTransitivity, 83.2s TimeCoverageRelationStatistics Valid=2602, Invalid=37998, Unknown=2, NotChecked=0, Total=40602 [2022-11-16 11:50:08,293 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 92 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 3059 mSolverCounterSat, 702 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 5348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 702 IncrementalHoareTripleChecker+Valid, 3059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1587 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:08,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 218 Invalid, 5348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [702 Valid, 3059 Invalid, 0 Unknown, 1587 Unchecked, 4.3s Time] [2022-11-16 11:50:08,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-11-16 11:50:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 213. [2022-11-16 11:50:08,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.1037735849056605) internal successors, (234), 212 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:08,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 234 transitions. [2022-11-16 11:50:08,338 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 234 transitions. Word has length 115 [2022-11-16 11:50:08,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:08,338 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 234 transitions. [2022-11-16 11:50:08,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.911504424778761) internal successors, (329), 113 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:08,339 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 234 transitions. [2022-11-16 11:50:08,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-16 11:50:08,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:08,340 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-16 11:50:08,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-16 11:50:08,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:50:08,544 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:50:08,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:08,544 INFO L85 PathProgramCache]: Analyzing trace with hash 154504470, now seen corresponding path program 10 times [2022-11-16 11:50:08,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:08,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611983822] [2022-11-16 11:50:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:08,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-16 11:50:08,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:08,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611983822] [2022-11-16 11:50:08,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611983822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:50:08,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535675089] [2022-11-16 11:50:08,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:50:08,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:50:08,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:50:08,887 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:50:08,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:50:09,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:50:09,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:50:09,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:50:09,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-16 11:50:09,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:50:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-16 11:50:09,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535675089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:50:09,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:50:09,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-16 11:50:09,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238515564] [2022-11-16 11:50:09,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:50:09,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:50:09,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:09,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:50:09,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:50:09,565 INFO L87 Difference]: Start difference. First operand 213 states and 234 transitions. Second operand has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:10,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:10,549 INFO L93 Difference]: Finished difference Result 516 states and 569 transitions. [2022-11-16 11:50:10,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:50:10,550 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2022-11-16 11:50:10,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:10,551 INFO L225 Difference]: With dead ends: 516 [2022-11-16 11:50:10,552 INFO L226 Difference]: Without dead ends: 244 [2022-11-16 11:50:10,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 218 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:50:10,553 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 286 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:10,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 46 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:50:10,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-16 11:50:10,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 216. [2022-11-16 11:50:10,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.0883720930232559) internal successors, (234), 215 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 234 transitions. [2022-11-16 11:50:10,592 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 234 transitions. Word has length 117 [2022-11-16 11:50:10,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:10,592 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 234 transitions. [2022-11-16 11:50:10,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 234 transitions. [2022-11-16 11:50:10,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-16 11:50:10,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:10,595 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-16 11:50:10,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:50:10,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:50:10,795 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:50:10,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:10,796 INFO L85 PathProgramCache]: Analyzing trace with hash 28051576, now seen corresponding path program 11 times [2022-11-16 11:50:10,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:10,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484101537] [2022-11-16 11:50:10,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:10,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-16 11:50:11,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:11,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484101537] [2022-11-16 11:50:11,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484101537] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:50:11,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827264764] [2022-11-16 11:50:11,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:50:11,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:50:11,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:50:11,138 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:50:11,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:50:11,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-16 11:50:11,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:50:11,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:50:11,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-16 11:50:11,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:50:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-16 11:50:12,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827264764] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:50:12,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:50:12,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-16 11:50:12,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640981397] [2022-11-16 11:50:12,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:50:12,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:50:12,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:12,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:50:12,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:50:12,124 INFO L87 Difference]: Start difference. First operand 216 states and 234 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:13,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:13,110 INFO L93 Difference]: Finished difference Result 232 states and 250 transitions. [2022-11-16 11:50:13,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:50:13,111 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2022-11-16 11:50:13,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:13,115 INFO L225 Difference]: With dead ends: 232 [2022-11-16 11:50:13,116 INFO L226 Difference]: Without dead ends: 148 [2022-11-16 11:50:13,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 221 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:50:13,118 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 307 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:13,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 40 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:50:13,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-16 11:50:13,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 138. [2022-11-16 11:50:13,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0802919708029197) internal successors, (148), 137 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:13,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2022-11-16 11:50:13,145 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 119 [2022-11-16 11:50:13,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:13,145 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2022-11-16 11:50:13,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:13,146 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2022-11-16 11:50:13,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-16 11:50:13,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:13,148 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:50:13,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:50:13,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:50:13,367 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:50:13,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:13,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1639815466, now seen corresponding path program 12 times [2022-11-16 11:50:13,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:13,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861874319] [2022-11-16 11:50:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:13,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 10 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:53,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:53,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861874319] [2022-11-16 11:50:53,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861874319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:50:53,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597093207] [2022-11-16 11:50:53,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:50:53,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:50:53,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:50:53,884 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:50:53,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb88f0a-7bf5-460e-939d-3a2b019af648/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:50:54,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-16 11:50:54,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:50:54,043 WARN L261 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 233 conjunts are in the unsatisfiable core [2022-11-16 11:50:54,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:54,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:51:06,997 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:51:06,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2022-11-16 11:51:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 3 proven. 271 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:51:07,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:51:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:51:36,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597093207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:51:36,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:51:36,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 32, 25] total 134 [2022-11-16 11:51:36,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548271737] [2022-11-16 11:51:36,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:51:36,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-11-16 11:51:36,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:36,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-11-16 11:51:36,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=684, Invalid=17138, Unknown=0, NotChecked=0, Total=17822 [2022-11-16 11:51:36,724 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand has 134 states, 134 states have (on average 2.9402985074626864) internal successors, (394), 134 states have internal predecessors, (394), 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)