./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro --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 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab --- 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-8393723 [2022-11-18 20:25:40,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:25:40,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:25:40,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:25:40,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:25:40,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:25:40,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:25:40,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:25:40,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:25:40,955 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:25:40,957 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:25:40,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:25:40,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:25:40,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:25:40,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:25:40,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:25:40,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:25:40,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:25:40,968 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:25:40,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:25:40,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:25:40,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:25:40,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:25:40,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:25:40,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:25:40,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:25:40,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:25:40,986 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:25:40,987 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:25:40,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:25:40,988 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:25:40,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:25:41,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:25:41,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:25:41,004 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:25:41,004 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:25:41,005 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:25:41,005 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:25:41,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:25:41,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:25:41,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:25:41,011 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:25:41,057 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:25:41,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:25:41,062 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:25:41,062 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:25:41,064 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:25:41,064 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:25:41,065 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:25:41,066 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:25:41,066 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:25:41,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:25:41,067 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:25:41,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:25:41,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:25:41,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:25:41,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:25:41,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:25:41,069 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:25:41,069 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:25:41,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:25:41,070 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:25:41,070 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:25:41,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:25:41,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:25:41,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:25:41,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:25:41,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:25:41,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:25:41,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:25:41,072 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:25:41,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:25:41,073 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:25:41,073 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:25:41,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:25:41,074 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_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab [2022-11-18 20:25:41,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:25:41,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:25:41,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:25:41,480 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:25:41,481 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:25:41,483 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/verifythis/prefixsum_rec.c [2022-11-18 20:25:41,562 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/data/fdbd47db6/7ce1068c12ce4a49b8f1d5f0ec13e900/FLAGf1669931f [2022-11-18 20:25:42,170 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:25:42,171 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/sv-benchmarks/c/verifythis/prefixsum_rec.c [2022-11-18 20:25:42,180 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/data/fdbd47db6/7ce1068c12ce4a49b8f1d5f0ec13e900/FLAGf1669931f [2022-11-18 20:25:42,475 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/data/fdbd47db6/7ce1068c12ce4a49b8f1d5f0ec13e900 [2022-11-18 20:25:42,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:25:42,480 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:25:42,482 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:25:42,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:25:42,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:25:42,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:25:42" (1/1) ... [2022-11-18 20:25:42,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37bc442a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:42, skipping insertion in model container [2022-11-18 20:25:42,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:25:42" (1/1) ... [2022-11-18 20:25:42,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:25:42,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:25:42,707 WARN L234 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_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/sv-benchmarks/c/verifythis/prefixsum_rec.c[525,538] [2022-11-18 20:25:42,738 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:25:42,750 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:25:42,763 WARN L234 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_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/sv-benchmarks/c/verifythis/prefixsum_rec.c[525,538] [2022-11-18 20:25:42,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:25:42,797 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:25:42,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:42 WrapperNode [2022-11-18 20:25:42,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:25:42,799 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:25:42,799 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:25:42,799 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:25:42,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:42" (1/1) ... [2022-11-18 20:25:42,823 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:42" (1/1) ... [2022-11-18 20:25:42,861 INFO L138 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2022-11-18 20:25:42,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:25:42,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:25:42,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:25:42,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:25:42,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:42" (1/1) ... [2022-11-18 20:25:42,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:42" (1/1) ... [2022-11-18 20:25:42,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:42" (1/1) ... [2022-11-18 20:25:42,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:42" (1/1) ... [2022-11-18 20:25:42,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:42" (1/1) ... [2022-11-18 20:25:42,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:42" (1/1) ... [2022-11-18 20:25:42,924 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:42" (1/1) ... [2022-11-18 20:25:42,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:42" (1/1) ... [2022-11-18 20:25:42,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:25:42,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:25:42,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:25:42,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:25:42,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:42" (1/1) ... [2022-11-18 20:25:42,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:25:42,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:42,988 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:25:43,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:25:43,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:25:43,043 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-18 20:25:43,043 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-18 20:25:43,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:25:43,044 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2022-11-18 20:25:43,044 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2022-11-18 20:25:43,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:25:43,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:25:43,044 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2022-11-18 20:25:43,045 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2022-11-18 20:25:43,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:25:43,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:25:43,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:25:43,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-18 20:25:43,046 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-18 20:25:43,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:25:43,175 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:25:43,177 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:25:43,624 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:25:43,643 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:25:43,643 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 20:25:43,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:25:43 BoogieIcfgContainer [2022-11-18 20:25:43,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:25:43,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:25:43,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:25:43,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:25:43,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:25:42" (1/3) ... [2022-11-18 20:25:43,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52375af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:25:43, skipping insertion in model container [2022-11-18 20:25:43,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:25:42" (2/3) ... [2022-11-18 20:25:43,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52375af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:25:43, skipping insertion in model container [2022-11-18 20:25:43,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:25:43" (3/3) ... [2022-11-18 20:25:43,660 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2022-11-18 20:25:43,684 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:25:43,685 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:25:43,780 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:25:43,790 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;@318c4fbf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:25:43,790 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:25:43,795 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 36 states have internal predecessors, (44), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-18 20:25:43,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-18 20:25:43,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:43,808 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:43,808 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:25:43,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:43,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1639330660, now seen corresponding path program 1 times [2022-11-18 20:25:43,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:43,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707335521] [2022-11-18 20:25:43,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:43,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:44,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:25:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:44,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 20:25:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:44,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-18 20:25:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:44,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 20:25:44,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:44,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 20:25:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:44,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 20:25:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:25:44,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:44,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707335521] [2022-11-18 20:25:44,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707335521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:25:44,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:25:44,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:25:44,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764563538] [2022-11-18 20:25:44,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:25:44,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:25:44,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:44,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:25:44,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:25:44,406 INFO L87 Difference]: Start difference. First operand has 49 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 36 states have internal predecessors, (44), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:25:44,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:44,565 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2022-11-18 20:25:44,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:25:44,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-11-18 20:25:44,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:44,579 INFO L225 Difference]: With dead ends: 96 [2022-11-18 20:25:44,580 INFO L226 Difference]: Without dead ends: 46 [2022-11-18 20:25:44,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:25:44,591 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 6 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:44,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 85 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:25:44,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-18 20:25:44,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-11-18 20:25:44,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-18 20:25:44,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2022-11-18 20:25:44,654 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 44 [2022-11-18 20:25:44,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:44,655 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2022-11-18 20:25:44,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:25:44,656 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2022-11-18 20:25:44,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-18 20:25:44,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:44,666 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:44,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:25:44,667 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:25:44,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:44,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1439199646, now seen corresponding path program 1 times [2022-11-18 20:25:44,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:44,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900611052] [2022-11-18 20:25:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:44,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:45,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:25:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:45,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 20:25:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:45,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-18 20:25:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:45,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 20:25:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:45,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-18 20:25:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:45,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 20:25:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:25:45,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:45,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900611052] [2022-11-18 20:25:45,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900611052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:25:45,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:25:45,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:25:45,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853982645] [2022-11-18 20:25:45,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:25:45,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:25:45,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:45,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:25:45,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:25:45,311 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:25:45,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:45,611 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2022-11-18 20:25:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:25:45,612 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-11-18 20:25:45,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:45,618 INFO L225 Difference]: With dead ends: 87 [2022-11-18 20:25:45,618 INFO L226 Difference]: Without dead ends: 71 [2022-11-18 20:25:45,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:25:45,620 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 36 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:45,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 210 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:25:45,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-18 20:25:45,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2022-11-18 20:25:45,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-18 20:25:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-11-18 20:25:45,633 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 44 [2022-11-18 20:25:45,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:45,634 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-11-18 20:25:45,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:25:45,634 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-11-18 20:25:45,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-18 20:25:45,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:45,636 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:45,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:25:45,637 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:25:45,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:45,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1012024996, now seen corresponding path program 1 times [2022-11-18 20:25:45,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:45,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517468782] [2022-11-18 20:25:45,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:45,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:45,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:25:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:45,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 20:25:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:45,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-18 20:25:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:45,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 20:25:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:45,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-18 20:25:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:45,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 20:25:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:25:45,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:45,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517468782] [2022-11-18 20:25:45,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517468782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:45,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276273389] [2022-11-18 20:25:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:45,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:45,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:45,962 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:45,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:25:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:46,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:25:46,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:25:46,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:25:46,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276273389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:46,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:46,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-11-18 20:25:46,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236969821] [2022-11-18 20:25:46,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:46,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:25:46,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:46,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:25:46,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:25:46,490 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-18 20:25:46,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:46,778 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2022-11-18 20:25:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:25:46,779 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 46 [2022-11-18 20:25:46,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:46,784 INFO L225 Difference]: With dead ends: 73 [2022-11-18 20:25:46,784 INFO L226 Difference]: Without dead ends: 50 [2022-11-18 20:25:46,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:25:46,789 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 40 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:46,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 252 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:25:46,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-18 20:25:46,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-11-18 20:25:46,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-18 20:25:46,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-11-18 20:25:46,817 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 46 [2022-11-18 20:25:46,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:46,818 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-11-18 20:25:46,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-18 20:25:46,818 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-11-18 20:25:46,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 20:25:46,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:46,823 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:46,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-18 20:25:47,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:47,029 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:25:47,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:47,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1298139546, now seen corresponding path program 2 times [2022-11-18 20:25:47,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:47,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715052472] [2022-11-18 20:25:47,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:47,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:48,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:25:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:48,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 20:25:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:48,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-18 20:25:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:48,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 20:25:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:48,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-18 20:25:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:49,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 20:25:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:50,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:25:50,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:50,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715052472] [2022-11-18 20:25:50,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715052472] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:50,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265943365] [2022-11-18 20:25:50,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:25:50,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:50,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:50,133 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:50,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:25:50,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:25:50,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:50,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-18 20:25:50,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:50,387 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 16 treesize of output 12 [2022-11-18 20:25:50,554 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_123 Int) (downsweep_~left Int)) (and (= (store |c_old(#memory_int)| |c_downsweep_#in~a.base| (let ((.cse0 (select |c_old(#memory_int)| |c_downsweep_#in~a.base|)) (.cse1 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~right| 4)))) (store (store .cse0 .cse1 v_ArrVal_123) (+ |c_downsweep_#in~a.offset| (* downsweep_~left 4)) (select .cse0 .cse1)))) |c_#memory_int|) (<= downsweep_~left |c_downsweep_#in~left|) (not (< (+ downsweep_~left 1) |c_downsweep_#in~right|)))) is different from true [2022-11-18 20:25:50,655 INFO L321 Elim1Store]: treesize reduction 34, result has 26.1 percent of original size [2022-11-18 20:25:50,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 27 [2022-11-18 20:25:50,989 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-18 20:25:50,990 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 36 treesize of output 23 [2022-11-18 20:25:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:25:51,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:51,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265943365] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:51,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:25:51,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 28 [2022-11-18 20:25:51,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640241898] [2022-11-18 20:25:51,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:51,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-18 20:25:51,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:51,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-18 20:25:51,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=772, Unknown=1, NotChecked=56, Total=930 [2022-11-18 20:25:51,487 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 28 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-18 20:25:52,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:52,930 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2022-11-18 20:25:52,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:25:52,931 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 48 [2022-11-18 20:25:52,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:52,933 INFO L225 Difference]: With dead ends: 65 [2022-11-18 20:25:52,934 INFO L226 Difference]: Without dead ends: 63 [2022-11-18 20:25:52,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=201, Invalid=1442, Unknown=1, NotChecked=78, Total=1722 [2022-11-18 20:25:52,935 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 58 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:52,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 300 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 458 Invalid, 0 Unknown, 116 Unchecked, 0.5s Time] [2022-11-18 20:25:52,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-18 20:25:52,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2022-11-18 20:25:52,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2022-11-18 20:25:52,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2022-11-18 20:25:52,946 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 48 [2022-11-18 20:25:52,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:52,946 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2022-11-18 20:25:52,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-18 20:25:52,947 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2022-11-18 20:25:52,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-18 20:25:52,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:52,948 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:52,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:53,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:53,159 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:25:53,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:53,160 INFO L85 PathProgramCache]: Analyzing trace with hash 736701521, now seen corresponding path program 1 times [2022-11-18 20:25:53,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:53,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880907455] [2022-11-18 20:25:53,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:53,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:53,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:25:53,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:53,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 20:25:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:53,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-18 20:25:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:53,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 20:25:53,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:53,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-18 20:25:53,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:53,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 20:25:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:53,656 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:25:53,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:53,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880907455] [2022-11-18 20:25:53,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880907455] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:53,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382246990] [2022-11-18 20:25:53,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:53,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:53,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:53,663 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:53,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:25:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:53,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 115 conjunts are in the unsatisfiable core [2022-11-18 20:25:53,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:53,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:25:53,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-18 20:25:53,941 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:25:53,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:25:54,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:25:54,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-18 20:25:54,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-18 20:25:54,540 WARN L859 $PredicateComparison]: unable to prove that (exists ((upsweep_~right Int) (upsweep_~a.offset Int) (v_ArrVal_177 Int)) (and (<= |c_upsweep_#in~right| upsweep_~right) (<= upsweep_~right (+ |c_upsweep_#in~left| 1)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_upsweep_#in~a.base| (store (select |c_old(#memory_int)| |c_upsweep_#in~a.base|) (+ (* upsweep_~right 4) upsweep_~a.offset) v_ArrVal_177))) (<= |c_upsweep_#in~a.offset| upsweep_~a.offset))) is different from true [2022-11-18 20:25:54,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2022-11-18 20:25:54,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2022-11-18 20:25:55,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 123 [2022-11-18 20:25:56,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 121 [2022-11-18 20:25:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:25:56,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:33,842 WARN L233 SmtUtils]: Spent 8.16s on a formula simplification. DAG size of input: 59 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:26:33,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382246990] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:33,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:26:33,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 28] total 35 [2022-11-18 20:26:33,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501549700] [2022-11-18 20:26:33,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:33,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 20:26:33,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:33,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 20:26:33,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1570, Unknown=13, NotChecked=80, Total=1806 [2022-11-18 20:26:33,847 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 35 states, 31 states have (on average 2.096774193548387) internal successors, (65), 29 states have internal predecessors, (65), 7 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-18 20:26:41,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:26:41,683 INFO L93 Difference]: Finished difference Result 113 states and 145 transitions. [2022-11-18 20:26:41,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-18 20:26:41,684 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 2.096774193548387) internal successors, (65), 29 states have internal predecessors, (65), 7 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 52 [2022-11-18 20:26:41,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:26:41,686 INFO L225 Difference]: With dead ends: 113 [2022-11-18 20:26:41,686 INFO L226 Difference]: Without dead ends: 85 [2022-11-18 20:26:41,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 45.8s TimeCoverageRelationStatistics Valid=293, Invalid=3117, Unknown=16, NotChecked=114, Total=3540 [2022-11-18 20:26:41,689 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 24 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 398 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:26:41,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 270 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 509 Invalid, 0 Unknown, 398 Unchecked, 0.7s Time] [2022-11-18 20:26:41,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-18 20:26:41,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2022-11-18 20:26:41,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 61 states have internal predecessors, (67), 15 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (23), 16 states have call predecessors, (23), 15 states have call successors, (23) [2022-11-18 20:26:41,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2022-11-18 20:26:41,725 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 52 [2022-11-18 20:26:41,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:26:41,725 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2022-11-18 20:26:41,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 2.096774193548387) internal successors, (65), 29 states have internal predecessors, (65), 7 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-18 20:26:41,726 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2022-11-18 20:26:41,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-18 20:26:41,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:26:41,728 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:41,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-18 20:26:41,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:41,935 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:26:41,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:41,936 INFO L85 PathProgramCache]: Analyzing trace with hash -362686961, now seen corresponding path program 2 times [2022-11-18 20:26:41,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:41,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451034920] [2022-11-18 20:26:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:41,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:42,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:26:42,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:42,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 20:26:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:42,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-18 20:26:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:42,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 20:26:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:42,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-18 20:26:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:42,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 20:26:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:26:42,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:42,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451034920] [2022-11-18 20:26:42,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451034920] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:42,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28696454] [2022-11-18 20:26:42,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:26:42,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:42,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:42,198 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:42,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:26:42,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:26:42,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:26:42,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:26:42,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:26:42,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:26:42,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28696454] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:42,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:26:42,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2022-11-18 20:26:42,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387912491] [2022-11-18 20:26:42,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:42,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:26:42,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:42,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:26:42,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:26:42,670 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-18 20:26:43,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:26:43,210 INFO L93 Difference]: Finished difference Result 112 states and 141 transitions. [2022-11-18 20:26:43,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:26:43,211 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2022-11-18 20:26:43,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:26:43,213 INFO L225 Difference]: With dead ends: 112 [2022-11-18 20:26:43,213 INFO L226 Difference]: Without dead ends: 92 [2022-11-18 20:26:43,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:26:43,215 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 33 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:26:43,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 364 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:26:43,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-18 20:26:43,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2022-11-18 20:26:43,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 62 states have internal predecessors, (68), 16 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2022-11-18 20:26:43,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2022-11-18 20:26:43,258 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 54 [2022-11-18 20:26:43,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:26:43,259 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2022-11-18 20:26:43,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-18 20:26:43,260 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2022-11-18 20:26:43,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-18 20:26:43,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:26:43,262 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:43,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:26:43,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 20:26:43,471 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:26:43,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:43,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1333958502, now seen corresponding path program 1 times [2022-11-18 20:26:43,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:43,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570056980] [2022-11-18 20:26:43,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:43,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:43,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:26:43,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:43,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:26:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:43,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-18 20:26:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:43,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:26:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:43,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:26:43,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:43,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-18 20:26:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:26:43,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:43,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570056980] [2022-11-18 20:26:43,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570056980] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:43,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58981766] [2022-11-18 20:26:43,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:43,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:43,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:43,768 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:43,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:26:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:43,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:26:43,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:26:44,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:26:44,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58981766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:44,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:26:44,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 16 [2022-11-18 20:26:44,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22010691] [2022-11-18 20:26:44,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:44,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:26:44,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:44,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:26:44,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:26:44,178 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:26:44,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:26:44,615 INFO L93 Difference]: Finished difference Result 121 states and 146 transitions. [2022-11-18 20:26:44,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:26:44,616 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 57 [2022-11-18 20:26:44,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:26:44,617 INFO L225 Difference]: With dead ends: 121 [2022-11-18 20:26:44,618 INFO L226 Difference]: Without dead ends: 105 [2022-11-18 20:26:44,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 115 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:26:44,619 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 74 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:26:44,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 340 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:26:44,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-18 20:26:44,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2022-11-18 20:26:44,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.126984126984127) internal successors, (71), 64 states have internal predecessors, (71), 16 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (22), 17 states have call predecessors, (22), 16 states have call successors, (22) [2022-11-18 20:26:44,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2022-11-18 20:26:44,644 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 57 [2022-11-18 20:26:44,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:26:44,644 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2022-11-18 20:26:44,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:26:44,645 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2022-11-18 20:26:44,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:26:44,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:26:44,647 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:44,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-18 20:26:44,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:44,855 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:26:44,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:44,855 INFO L85 PathProgramCache]: Analyzing trace with hash 33191180, now seen corresponding path program 1 times [2022-11-18 20:26:44,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:44,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982781803] [2022-11-18 20:26:44,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:44,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:44,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:45,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:26:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:45,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:26:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:45,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-18 20:26:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:45,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:26:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:45,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:26:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:45,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-18 20:26:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:45,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:26:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:45,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:26:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 20:26:45,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:45,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982781803] [2022-11-18 20:26:45,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982781803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:45,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609920329] [2022-11-18 20:26:45,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:45,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:45,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:45,159 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:45,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:26:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:45,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:26:45,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 20:26:45,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 20:26:46,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609920329] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:46,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:26:46,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 20 [2022-11-18 20:26:46,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796625432] [2022-11-18 20:26:46,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:46,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:26:46,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:46,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:26:46,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:26:46,014 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-18 20:26:46,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:26:46,670 INFO L93 Difference]: Finished difference Result 103 states and 127 transitions. [2022-11-18 20:26:46,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:26:46,671 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 59 [2022-11-18 20:26:46,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:26:46,672 INFO L225 Difference]: With dead ends: 103 [2022-11-18 20:26:46,672 INFO L226 Difference]: Without dead ends: 92 [2022-11-18 20:26:46,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:26:46,674 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 99 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:26:46,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 293 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:26:46,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-18 20:26:46,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2022-11-18 20:26:46,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 63 states have (on average 1.126984126984127) internal successors, (71), 65 states have internal predecessors, (71), 17 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (23), 17 states have call predecessors, (23), 17 states have call successors, (23) [2022-11-18 20:26:46,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2022-11-18 20:26:46,708 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 59 [2022-11-18 20:26:46,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:26:46,708 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2022-11-18 20:26:46,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-18 20:26:46,709 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2022-11-18 20:26:46,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-18 20:26:46,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:26:46,712 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:46,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:26:46,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:46,918 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:26:46,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:46,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1099509749, now seen corresponding path program 1 times [2022-11-18 20:26:46,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:46,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322234109] [2022-11-18 20:26:46,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:46,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:47,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:26:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:47,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:26:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:47,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-18 20:26:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:47,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:26:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:47,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:26:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:47,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:26:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:47,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:26:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:47,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-18 20:26:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-18 20:26:47,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:47,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322234109] [2022-11-18 20:26:47,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322234109] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:47,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965037132] [2022-11-18 20:26:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:47,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:47,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:47,207 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:47,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:26:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:47,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:26:47,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-18 20:26:47,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-18 20:26:47,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965037132] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:47,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:26:47,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-11-18 20:26:47,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693586200] [2022-11-18 20:26:47,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:47,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:26:47,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:47,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:26:47,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:26:47,840 INFO L87 Difference]: Start difference. First operand 89 states and 111 transitions. Second operand has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 19 states have internal predecessors, (62), 7 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-18 20:26:48,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:26:48,053 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2022-11-18 20:26:48,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:26:48,053 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 19 states have internal predecessors, (62), 7 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) Word has length 65 [2022-11-18 20:26:48,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:26:48,054 INFO L225 Difference]: With dead ends: 100 [2022-11-18 20:26:48,054 INFO L226 Difference]: Without dead ends: 73 [2022-11-18 20:26:48,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:26:48,055 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 25 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:26:48,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 198 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:26:48,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-18 20:26:48,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2022-11-18 20:26:48,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 40 states have (on average 1.125) internal successors, (45), 42 states have internal predecessors, (45), 10 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-18 20:26:48,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2022-11-18 20:26:48,071 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 65 [2022-11-18 20:26:48,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:26:48,072 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2022-11-18 20:26:48,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 19 states have internal predecessors, (62), 7 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-18 20:26:48,072 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2022-11-18 20:26:48,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-18 20:26:48,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:26:48,075 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:48,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:26:48,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 20:26:48,282 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:26:48,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:48,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1124650442, now seen corresponding path program 1 times [2022-11-18 20:26:48,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:48,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589955474] [2022-11-18 20:26:48,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:48,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:48,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:26:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:48,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 20:26:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:48,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-18 20:26:48,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:48,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 20:26:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:48,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-18 20:26:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:48,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:26:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:48,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:26:48,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:48,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 20:26:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:48,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:26:48,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:48,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:26:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-18 20:26:48,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:48,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589955474] [2022-11-18 20:26:48,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589955474] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:48,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469978240] [2022-11-18 20:26:48,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:48,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:48,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:48,841 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:48,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:26:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:49,021 WARN L261 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 179 conjunts are in the unsatisfiable core [2022-11-18 20:26:49,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:49,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:26:49,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-18 20:26:49,257 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:26:49,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:26:49,305 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_482 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_482) |c_#memory_int|)) is different from true [2022-11-18 20:26:49,315 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 13 treesize of output 15 [2022-11-18 20:26:49,370 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 13 treesize of output 15 [2022-11-18 20:26:49,421 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 13 treesize of output 15 [2022-11-18 20:26:49,483 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 13 treesize of output 15 [2022-11-18 20:26:49,925 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_486 Int)) (= (store |c_old(#memory_int)| |c_upsweep_#in~a.base| (store (select |c_old(#memory_int)| |c_upsweep_#in~a.base|) (+ (* |c_upsweep_#in~right| 4) |c_upsweep_#in~a.offset|) v_ArrVal_486)) |c_#memory_int|)) is different from true [2022-11-18 20:26:50,081 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_488 Int)) (= (store |c_old(#memory_int)| |c_upsweep_#in~a.base| (store (select |c_old(#memory_int)| |c_upsweep_#in~a.base|) (+ (* |c_upsweep_#in~right| 4) |c_upsweep_#in~a.offset|) v_ArrVal_488)) |c_#memory_int|)) is different from true [2022-11-18 20:26:50,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-18 20:26:51,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 33 [2022-11-18 20:26:51,627 WARN L859 $PredicateComparison]: unable to prove that (exists ((downsweep_~left Int)) (and (= (store |c_old(#memory_int)| |c_downsweep_#in~a.base| (let ((.cse0 (select |c_old(#memory_int)| |c_downsweep_#in~a.base|)) (.cse1 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~right| 4)))) (let ((.cse3 (+ |c_downsweep_#in~a.offset| (* downsweep_~left 4))) (.cse2 (select .cse0 .cse1))) (store (store .cse0 .cse1 (+ .cse2 (select .cse0 .cse3))) .cse3 .cse2)))) |c_#memory_int|) (<= downsweep_~left |c_downsweep_#in~left|) (not (< (+ downsweep_~left 1) |c_downsweep_#in~right|)))) is different from true [2022-11-18 20:26:51,897 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_500 Int) (downsweep_~left Int) (downsweep_~right Int) (downsweep_~a.offset Int) (v_ArrVal_501 Int)) (and (<= |c_downsweep_#in~right| downsweep_~right) (= |c_#memory_int| (store |c_old(#memory_int)| |c_downsweep_#in~a.base| (store (store (select |c_old(#memory_int)| |c_downsweep_#in~a.base|) (+ downsweep_~a.offset (* downsweep_~right 4)) v_ArrVal_501) (+ downsweep_~a.offset (* downsweep_~left 4)) v_ArrVal_500))) (<= |c_downsweep_#in~left| downsweep_~left) (<= |c_downsweep_#in~a.offset| downsweep_~a.offset))) is different from true [2022-11-18 20:26:52,077 WARN L859 $PredicateComparison]: unable to prove that (and (< (+ |c_downsweep_#in~left| 1) |c_downsweep_#in~right|) (exists ((v_ArrVal_500 Int) (v_downsweep_~left_41 Int) (v_ArrVal_495 Int) (downsweep_~left Int) (v_downsweep_~right_41 Int) (v_downsweep_~a.offset_41 Int) (v_ArrVal_501 Int)) (and (<= |c_downsweep_#in~right| v_downsweep_~right_41) (<= (+ |c_downsweep_#in~right| v_downsweep_~left_41) (+ |c_downsweep_#in~left| downsweep_~left)) (<= (+ |c_downsweep_#in~right| (* 2 v_downsweep_~left_41)) (+ (* |c_downsweep_#in~left| 3) 1)) (<= |c_downsweep_#in~a.offset| v_downsweep_~a.offset_41) (not (< (+ 1 v_downsweep_~left_41) |c_downsweep_#in~left|)) (= (store |c_old(#memory_int)| |c_downsweep_#in~a.base| (store (store (let ((.cse4 (select |c_old(#memory_int)| |c_downsweep_#in~a.base|)) (.cse5 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~right| 4)))) (let ((.cse3 (+ |c_downsweep_#in~a.offset| (* 4 v_downsweep_~left_41))) (.cse2 (select .cse4 .cse5))) (store (let ((.cse0 (store .cse4 .cse5 v_ArrVal_495)) (.cse1 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~left| 4)))) (store .cse0 .cse1 (+ (select (store .cse0 .cse1 .cse2) .cse3) .cse2))) .cse3 .cse2))) (+ (* v_downsweep_~right_41 4) v_downsweep_~a.offset_41) v_ArrVal_501) (+ v_downsweep_~a.offset_41 (* downsweep_~left 4)) v_ArrVal_500)) |c_#memory_int|)))) is different from true [2022-11-18 20:26:52,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 123 [2022-11-18 20:26:54,460 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 157 treesize of output 151 [2022-11-18 20:26:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 16 not checked. [2022-11-18 20:26:54,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:56,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469978240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:56,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:26:56,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 39] total 48 [2022-11-18 20:26:56,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133838805] [2022-11-18 20:26:56,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:56,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-18 20:26:56,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:56,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-18 20:26:56,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1932, Unknown=6, NotChecked=558, Total=2652 [2022-11-18 20:26:56,769 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 48 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 40 states have internal predecessors, (79), 13 states have call successors, (19), 3 states have call predecessors, (19), 10 states have return successors, (19), 11 states have call predecessors, (19), 13 states have call successors, (19) [2022-11-18 20:26:58,460 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_old(#memory_int)| |c_upsweep_#in~a.base|)) (.cse1 (+ (* |c_upsweep_#in~right| 4) |c_upsweep_#in~a.offset|))) (and (exists ((v_ArrVal_488 Int)) (= (store |c_old(#memory_int)| |c_upsweep_#in~a.base| (store .cse0 .cse1 v_ArrVal_488)) |c_#memory_int|)) (exists ((v_ArrVal_486 Int)) (= (store |c_old(#memory_int)| |c_upsweep_#in~a.base| (store .cse0 .cse1 v_ArrVal_486)) |c_#memory_int|)))) is different from true [2022-11-18 20:27:01,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:27:01,642 INFO L93 Difference]: Finished difference Result 124 states and 167 transitions. [2022-11-18 20:27:01,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-18 20:27:01,644 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 40 states have internal predecessors, (79), 13 states have call successors, (19), 3 states have call predecessors, (19), 10 states have return successors, (19), 11 states have call predecessors, (19), 13 states have call successors, (19) Word has length 72 [2022-11-18 20:27:01,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:27:01,646 INFO L225 Difference]: With dead ends: 124 [2022-11-18 20:27:01,646 INFO L226 Difference]: Without dead ends: 96 [2022-11-18 20:27:01,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=389, Invalid=4887, Unknown=8, NotChecked=1036, Total=6320 [2022-11-18 20:27:01,648 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 67 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1223 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:27:01,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 408 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 701 Invalid, 0 Unknown, 1223 Unchecked, 0.6s Time] [2022-11-18 20:27:01,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-18 20:27:01,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2022-11-18 20:27:01,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 64 states have internal predecessors, (69), 17 states have call successors, (17), 5 states have call predecessors, (17), 9 states have return successors, (33), 19 states have call predecessors, (33), 17 states have call successors, (33) [2022-11-18 20:27:01,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2022-11-18 20:27:01,680 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 72 [2022-11-18 20:27:01,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:27:01,680 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2022-11-18 20:27:01,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 40 states have internal predecessors, (79), 13 states have call successors, (19), 3 states have call predecessors, (19), 10 states have return successors, (19), 11 states have call predecessors, (19), 13 states have call successors, (19) [2022-11-18 20:27:01,682 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2022-11-18 20:27:01,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-18 20:27:01,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:01,689 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:01,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:01,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db2e78d-0d23-4b08-bb8e-deccb1a3ecc0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:27:01,897 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:27:01,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:01,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1763257480, now seen corresponding path program 2 times [2022-11-18 20:27:01,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:01,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79659612] [2022-11-18 20:27:01,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:01,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:13,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:27:13,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:13,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 20:27:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:13,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-18 20:27:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:13,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 20:27:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:13,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-18 20:27:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:15,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:27:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:15,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:27:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:15,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-18 20:27:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat