./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:33:10,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:33:10,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:33:10,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:33:10,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:33:10,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:33:10,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:33:10,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:33:10,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:33:10,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:33:10,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:33:10,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:33:10,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:33:10,753 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:33:10,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:33:10,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:33:10,756 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:33:10,757 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:33:10,759 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:33:10,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:33:10,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:33:10,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:33:10,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:33:10,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:33:10,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:33:10,784 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:33:10,784 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:33:10,785 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:33:10,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:33:10,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:33:10,794 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:33:10,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:33:10,798 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:33:10,799 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:33:10,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:33:10,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:33:10,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:33:10,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:33:10,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:33:10,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:33:10,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:33:10,811 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 12:33:10,864 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:33:10,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:33:10,865 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:33:10,865 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:33:10,867 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:33:10,867 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:33:10,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:33:10,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:33:10,869 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:33:10,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:33:10,870 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:33:10,870 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:33:10,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:33:10,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:33:10,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:33:10,871 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:33:10,871 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:33:10,872 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:33:10,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:33:10,872 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:33:10,872 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:33:10,872 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:33:10,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:33:10,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:33:10,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:33:10,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:33:10,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:33:10,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:33:10,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:33:10,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:33:10,877 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_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b [2022-11-16 12:33:11,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:33:11,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:33:11,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:33:11,252 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:33:11,253 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:33:11,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2022-11-16 12:33:11,356 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/data/ce92b9ac6/fdc0b2df38444471bc7ed3249411a54d/FLAG0d99fcbc5 [2022-11-16 12:33:11,889 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:33:11,889 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2022-11-16 12:33:11,896 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/data/ce92b9ac6/fdc0b2df38444471bc7ed3249411a54d/FLAG0d99fcbc5 [2022-11-16 12:33:12,245 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/data/ce92b9ac6/fdc0b2df38444471bc7ed3249411a54d [2022-11-16 12:33:12,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:33:12,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:33:12,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:33:12,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:33:12,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:33:12,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:33:12" (1/1) ... [2022-11-16 12:33:12,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@664c42c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:12, skipping insertion in model container [2022-11-16 12:33:12,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:33:12" (1/1) ... [2022-11-16 12:33:12,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:33:12,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:33:12,502 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:33:12,512 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:33:12,545 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:33:12,563 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:33:12,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:12 WrapperNode [2022-11-16 12:33:12,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:33:12,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:33:12,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:33:12,566 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:33:12,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:12" (1/1) ... [2022-11-16 12:33:12,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:12" (1/1) ... [2022-11-16 12:33:12,618 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-11-16 12:33:12,618 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:33:12,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:33:12,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:33:12,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:33:12,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:12" (1/1) ... [2022-11-16 12:33:12,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:12" (1/1) ... [2022-11-16 12:33:12,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:12" (1/1) ... [2022-11-16 12:33:12,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:12" (1/1) ... [2022-11-16 12:33:12,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:12" (1/1) ... [2022-11-16 12:33:12,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:12" (1/1) ... [2022-11-16 12:33:12,654 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:12" (1/1) ... [2022-11-16 12:33:12,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:12" (1/1) ... [2022-11-16 12:33:12,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:33:12,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:33:12,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:33:12,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:33:12,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:12" (1/1) ... [2022-11-16 12:33:12,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:33:12,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:12,695 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:33:12,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:33:12,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:33:12,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:33:12,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:33:12,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:33:12,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:33:12,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:33:12,809 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:33:12,811 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:33:13,071 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:33:13,077 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:33:13,078 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 12:33:13,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:33:13 BoogieIcfgContainer [2022-11-16 12:33:13,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:33:13,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:33:13,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:33:13,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:33:13,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:33:12" (1/3) ... [2022-11-16 12:33:13,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15071db4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:33:13, skipping insertion in model container [2022-11-16 12:33:13,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:12" (2/3) ... [2022-11-16 12:33:13,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15071db4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:33:13, skipping insertion in model container [2022-11-16 12:33:13,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:33:13" (3/3) ... [2022-11-16 12:33:13,092 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-read.c [2022-11-16 12:33:13,130 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:33:13,131 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-16 12:33:13,221 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:33:13,240 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@1330bccf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:33:13,240 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-16 12:33:13,259 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:13,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:33:13,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:13,268 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:33:13,268 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:13,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:13,286 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2022-11-16 12:33:13,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:13,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943300518] [2022-11-16 12:33:13,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:13,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:13,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:13,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943300518] [2022-11-16 12:33:13,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943300518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:33:13,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:33:13,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:33:13,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233459379] [2022-11-16 12:33:13,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:33:13,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:33:13,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:13,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:33:13,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:33:13,724 INFO L87 Difference]: Start difference. First operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:13,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:13,811 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-11-16 12:33:13,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:33:13,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 12:33:13,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:13,828 INFO L225 Difference]: With dead ends: 59 [2022-11-16 12:33:13,829 INFO L226 Difference]: Without dead ends: 55 [2022-11-16 12:33:13,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:33:13,843 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:13,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:33:13,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-16 12:33:13,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2022-11-16 12:33:13,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:13,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-16 12:33:13,894 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2022-11-16 12:33:13,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:13,895 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-16 12:33:13,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:13,896 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-16 12:33:13,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:33:13,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:13,902 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:33:13,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:33:13,904 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:13,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:13,905 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2022-11-16 12:33:13,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:13,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133432063] [2022-11-16 12:33:13,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:13,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:14,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:14,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133432063] [2022-11-16 12:33:14,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133432063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:33:14,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:33:14,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:33:14,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358685258] [2022-11-16 12:33:14,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:33:14,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:33:14,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:14,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:33:14,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:33:14,042 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:14,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:14,094 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-11-16 12:33:14,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:33:14,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:33:14,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:14,096 INFO L225 Difference]: With dead ends: 58 [2022-11-16 12:33:14,097 INFO L226 Difference]: Without dead ends: 58 [2022-11-16 12:33:14,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:33:14,099 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:14,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:33:14,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-16 12:33:14,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2022-11-16 12:33:14,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:14,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-11-16 12:33:14,105 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-11-16 12:33:14,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:14,106 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-11-16 12:33:14,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:14,106 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-11-16 12:33:14,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:33:14,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:14,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:33:14,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:33:14,108 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:14,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:14,109 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2022-11-16 12:33:14,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:14,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051750446] [2022-11-16 12:33:14,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:14,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:14,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:14,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051750446] [2022-11-16 12:33:14,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051750446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:33:14,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:33:14,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:33:14,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980153127] [2022-11-16 12:33:14,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:33:14,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:33:14,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:14,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:33:14,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:33:14,260 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:14,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:14,300 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-11-16 12:33:14,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:33:14,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:33:14,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:14,301 INFO L225 Difference]: With dead ends: 32 [2022-11-16 12:33:14,302 INFO L226 Difference]: Without dead ends: 32 [2022-11-16 12:33:14,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:33:14,303 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:14,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:33:14,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-16 12:33:14,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-16 12:33:14,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.44) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:14,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-11-16 12:33:14,309 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2022-11-16 12:33:14,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:14,310 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-11-16 12:33:14,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:14,310 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-11-16 12:33:14,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:33:14,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:14,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:33:14,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:33:14,312 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:14,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:14,313 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2022-11-16 12:33:14,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:14,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537053440] [2022-11-16 12:33:14,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:14,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:14,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:14,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537053440] [2022-11-16 12:33:14,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537053440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:33:14,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:33:14,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:33:14,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896423267] [2022-11-16 12:33:14,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:33:14,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:33:14,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:14,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:33:14,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:33:14,576 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:14,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:14,681 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-11-16 12:33:14,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:33:14,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:33:14,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:14,682 INFO L225 Difference]: With dead ends: 55 [2022-11-16 12:33:14,683 INFO L226 Difference]: Without dead ends: 55 [2022-11-16 12:33:14,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:33:14,684 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 72 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:14,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 32 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:33:14,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-16 12:33:14,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2022-11-16 12:33:14,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:14,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-11-16 12:33:14,691 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-11-16 12:33:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:14,691 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-11-16 12:33:14,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:14,692 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-11-16 12:33:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:33:14,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:14,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:14,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:33:14,693 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:14,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:14,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2022-11-16 12:33:14,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:14,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131422485] [2022-11-16 12:33:14,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:14,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:14,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:14,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131422485] [2022-11-16 12:33:14,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131422485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:33:14,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:33:14,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:33:14,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378789452] [2022-11-16 12:33:14,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:33:14,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:33:14,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:14,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:33:14,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:33:14,763 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:14,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:14,834 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-11-16 12:33:14,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:33:14,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 12:33:14,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:14,835 INFO L225 Difference]: With dead ends: 60 [2022-11-16 12:33:14,835 INFO L226 Difference]: Without dead ends: 60 [2022-11-16 12:33:14,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:33:14,837 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:14,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 45 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:33:14,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-16 12:33:14,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2022-11-16 12:33:14,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:14,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-11-16 12:33:14,843 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 7 [2022-11-16 12:33:14,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:14,843 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-11-16 12:33:14,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:14,844 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-11-16 12:33:14,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:33:14,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:14,844 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:14,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:33:14,845 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:14,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:14,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2022-11-16 12:33:14,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:14,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35907614] [2022-11-16 12:33:14,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:14,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:14,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:14,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35907614] [2022-11-16 12:33:14,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35907614] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:14,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440066483] [2022-11-16 12:33:14,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:14,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:14,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:14,931 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:14,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:33:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:15,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:33:15,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:15,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:15,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440066483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:15,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:15,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-11-16 12:33:15,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173348035] [2022-11-16 12:33:15,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:15,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:33:15,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:15,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:33:15,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:33:15,211 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:15,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:15,319 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2022-11-16 12:33:15,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:33:15,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 12:33:15,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:15,323 INFO L225 Difference]: With dead ends: 130 [2022-11-16 12:33:15,323 INFO L226 Difference]: Without dead ends: 130 [2022-11-16 12:33:15,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:33:15,325 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 143 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:15,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 143 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:33:15,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-16 12:33:15,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 48. [2022-11-16 12:33:15,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:15,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-11-16 12:33:15,333 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 10 [2022-11-16 12:33:15,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:15,334 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-11-16 12:33:15,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:15,334 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-11-16 12:33:15,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:33:15,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:15,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:15,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 12:33:15,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 12:33:15,540 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:15,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:15,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2022-11-16 12:33:15,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:15,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40949080] [2022-11-16 12:33:15,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:15,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:15,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:15,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40949080] [2022-11-16 12:33:15,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40949080] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:15,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305168480] [2022-11-16 12:33:15,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:15,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:15,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:15,748 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:15,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:33:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:15,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:33:15,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:15,885 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:33:15,886 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:33:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:16,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:16,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305168480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:16,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:16,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-11-16 12:33:16,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915459907] [2022-11-16 12:33:16,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:16,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:33:16,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:16,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:33:16,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:33:16,138 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:16,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:16,423 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2022-11-16 12:33:16,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:33:16,424 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:33:16,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:16,425 INFO L225 Difference]: With dead ends: 129 [2022-11-16 12:33:16,425 INFO L226 Difference]: Without dead ends: 129 [2022-11-16 12:33:16,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:33:16,427 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 424 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:16,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 100 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:33:16,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-16 12:33:16,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 49. [2022-11-16 12:33:16,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:16,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-11-16 12:33:16,441 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 11 [2022-11-16 12:33:16,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:16,441 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-11-16 12:33:16,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:16,442 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-11-16 12:33:16,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:33:16,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:16,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:16,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:16,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:16,648 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:16,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:16,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2022-11-16 12:33:16,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:16,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810446956] [2022-11-16 12:33:16,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:16,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:16,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:16,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810446956] [2022-11-16 12:33:16,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810446956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:16,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521761379] [2022-11-16 12:33:16,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:16,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:16,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:16,750 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:16,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:33:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:16,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:33:16,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:16,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:16,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521761379] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:16,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:16,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:33:16,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962744455] [2022-11-16 12:33:16,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:16,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:33:16,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:16,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:33:16,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:33:16,935 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:17,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:17,131 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-11-16 12:33:17,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:33:17,132 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 12:33:17,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:17,132 INFO L225 Difference]: With dead ends: 88 [2022-11-16 12:33:17,132 INFO L226 Difference]: Without dead ends: 88 [2022-11-16 12:33:17,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:33:17,134 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 136 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:17,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 62 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:33:17,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-16 12:33:17,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 48. [2022-11-16 12:33:17,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:17,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-11-16 12:33:17,138 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 12 [2022-11-16 12:33:17,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:17,138 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-11-16 12:33:17,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:17,139 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-11-16 12:33:17,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:33:17,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:17,139 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:17,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:17,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:17,345 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:17,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:17,346 INFO L85 PathProgramCache]: Analyzing trace with hash 4840471, now seen corresponding path program 2 times [2022-11-16 12:33:17,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:17,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762366283] [2022-11-16 12:33:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:17,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:33:17,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:17,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762366283] [2022-11-16 12:33:17,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762366283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:33:17,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:33:17,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:33:17,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317846925] [2022-11-16 12:33:17,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:33:17,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:33:17,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:17,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:33:17,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:33:17,486 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:17,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:17,505 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-11-16 12:33:17,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:33:17,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:33:17,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:17,506 INFO L225 Difference]: With dead ends: 46 [2022-11-16 12:33:17,506 INFO L226 Difference]: Without dead ends: 46 [2022-11-16 12:33:17,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:33:17,507 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:17,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:33:17,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-16 12:33:17,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-16 12:33:17,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:17,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-11-16 12:33:17,511 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 17 [2022-11-16 12:33:17,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:17,512 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-11-16 12:33:17,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:17,512 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-11-16 12:33:17,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:33:17,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:17,513 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:17,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:33:17,513 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:17,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:17,514 INFO L85 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 1 times [2022-11-16 12:33:17,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:17,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937873425] [2022-11-16 12:33:17,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:17,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:33:17,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:17,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937873425] [2022-11-16 12:33:17,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937873425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:33:17,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:33:17,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:33:17,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080903095] [2022-11-16 12:33:17,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:33:17,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:33:17,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:17,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:33:17,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:33:17,628 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:17,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:17,660 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-11-16 12:33:17,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:33:17,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:33:17,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:17,662 INFO L225 Difference]: With dead ends: 76 [2022-11-16 12:33:17,662 INFO L226 Difference]: Without dead ends: 76 [2022-11-16 12:33:17,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:33:17,663 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:17,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 35 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:33:17,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-16 12:33:17,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2022-11-16 12:33:17,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:17,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-11-16 12:33:17,668 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 17 [2022-11-16 12:33:17,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:17,669 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-11-16 12:33:17,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:17,669 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-11-16 12:33:17,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 12:33:17,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:17,689 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:17,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:33:17,690 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:17,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:17,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2022-11-16 12:33:17,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:17,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58312930] [2022-11-16 12:33:17,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:17,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:17,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:33:17,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:17,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58312930] [2022-11-16 12:33:17,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58312930] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:17,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441640702] [2022-11-16 12:33:17,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:17,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:17,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:17,790 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:17,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:33:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:17,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:33:17,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:33:17,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:18,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-16 12:33:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:33:18,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441640702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:18,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:18,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-16 12:33:18,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078328901] [2022-11-16 12:33:18,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:18,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:33:18,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:18,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:33:18,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:33:18,123 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:18,223 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2022-11-16 12:33:18,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:33:18,223 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-16 12:33:18,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:18,225 INFO L225 Difference]: With dead ends: 80 [2022-11-16 12:33:18,225 INFO L226 Difference]: Without dead ends: 80 [2022-11-16 12:33:18,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:33:18,226 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 85 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:18,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 40 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:33:18,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-16 12:33:18,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2022-11-16 12:33:18,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:18,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-11-16 12:33:18,239 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 23 [2022-11-16 12:33:18,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:18,240 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-11-16 12:33:18,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:18,240 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-11-16 12:33:18,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 12:33:18,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:18,241 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2022-11-16 12:33:18,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:18,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 12:33:18,442 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:18,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:18,442 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2022-11-16 12:33:18,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:18,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086029885] [2022-11-16 12:33:18,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:18,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:33:18,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:18,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086029885] [2022-11-16 12:33:18,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086029885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:33:18,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:33:18,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:33:18,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207373898] [2022-11-16 12:33:18,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:33:18,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:33:18,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:18,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:33:18,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:33:18,588 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:18,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:18,680 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-11-16 12:33:18,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:33:18,681 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-16 12:33:18,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:18,682 INFO L225 Difference]: With dead ends: 86 [2022-11-16 12:33:18,682 INFO L226 Difference]: Without dead ends: 86 [2022-11-16 12:33:18,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:33:18,683 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 74 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:18,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 65 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:33:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-16 12:33:18,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2022-11-16 12:33:18,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 60 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:18,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2022-11-16 12:33:18,691 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 25 [2022-11-16 12:33:18,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:18,691 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2022-11-16 12:33:18,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:18,692 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2022-11-16 12:33:18,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 12:33:18,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:18,699 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] [2022-11-16 12:33:18,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 12:33:18,699 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:18,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:18,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1809865305, now seen corresponding path program 1 times [2022-11-16 12:33:18,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:18,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317023016] [2022-11-16 12:33:18,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:18,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:33:18,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:18,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317023016] [2022-11-16 12:33:18,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317023016] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:18,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3856742] [2022-11-16 12:33:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:18,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:18,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:18,798 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:18,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:33:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:18,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:33:18,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:19,212 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_16| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_11| Int) (v_ArrVal_129 Int) (v_ArrVal_128 Int) (v_ArrVal_127 Int)) (and (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_16| v_ArrVal_129) |v_ULTIMATE.start_main_~#mask~0#1.base_11|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_16|) 0) (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_16| v_ArrVal_128) |v_ULTIMATE.start_main_~#mask~0#1.base_11| v_ArrVal_127) |v_ULTIMATE.start_main_~#b~0#1.base_16| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_11| 0)))) is different from true [2022-11-16 12:33:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:33:19,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:33:19,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3856742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:33:19,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:33:19,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-16 12:33:19,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203987501] [2022-11-16 12:33:19,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:33:19,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:33:19,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:19,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:33:19,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2022-11-16 12:33:19,221 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:19,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:19,222 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2022-11-16 12:33:19,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:33:19,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-16 12:33:19,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:19,225 INFO L225 Difference]: With dead ends: 62 [2022-11-16 12:33:19,225 INFO L226 Difference]: Without dead ends: 60 [2022-11-16 12:33:19,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2022-11-16 12:33:19,226 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:19,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 21 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2022-11-16 12:33:19,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-16 12:33:19,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-16 12:33:19,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:19,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-11-16 12:33:19,230 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 26 [2022-11-16 12:33:19,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:19,231 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-11-16 12:33:19,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:19,231 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-11-16 12:33:19,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 12:33:19,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:19,233 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:19,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:19,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:19,439 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:19,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:19,440 INFO L85 PathProgramCache]: Analyzing trace with hash -271127104, now seen corresponding path program 1 times [2022-11-16 12:33:19,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:19,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510184524] [2022-11-16 12:33:19,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:19,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:33:19,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:19,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510184524] [2022-11-16 12:33:19,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510184524] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:19,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525327805] [2022-11-16 12:33:19,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:19,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:19,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:19,531 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:19,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:33:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:19,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:33:19,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:19,821 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 11 treesize of output 7 [2022-11-16 12:33:19,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:33:19,882 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:33:19,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 12:33:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:19,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:19,957 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 14 treesize of output 12 [2022-11-16 12:33:19,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-16 12:33:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:20,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525327805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:20,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:20,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11, 11] total 21 [2022-11-16 12:33:20,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739384663] [2022-11-16 12:33:20,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:20,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:33:20,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:20,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:33:20,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:33:20,174 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:20,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:20,515 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2022-11-16 12:33:20,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:33:20,516 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-16 12:33:20,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:20,517 INFO L225 Difference]: With dead ends: 101 [2022-11-16 12:33:20,517 INFO L226 Difference]: Without dead ends: 101 [2022-11-16 12:33:20,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:33:20,518 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:20,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 145 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:33:20,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-16 12:33:20,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 66. [2022-11-16 12:33:20,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:20,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-11-16 12:33:20,521 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 27 [2022-11-16 12:33:20,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:20,521 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-11-16 12:33:20,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:20,521 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-11-16 12:33:20,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 12:33:20,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:20,529 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:20,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-16 12:33:20,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 12:33:20,734 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:20,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:20,734 INFO L85 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2022-11-16 12:33:20,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:20,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187716904] [2022-11-16 12:33:20,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:20,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:33:20,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:20,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187716904] [2022-11-16 12:33:20,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187716904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:20,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551535256] [2022-11-16 12:33:20,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:20,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:20,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:20,869 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:20,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:33:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:20,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:33:20,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:33:21,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:33:21,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551535256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:21,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:21,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-16 12:33:21,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451825580] [2022-11-16 12:33:21,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:21,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:33:21,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:21,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:33:21,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:33:21,162 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:21,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:21,362 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-11-16 12:33:21,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:33:21,363 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-16 12:33:21,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:21,365 INFO L225 Difference]: With dead ends: 66 [2022-11-16 12:33:21,365 INFO L226 Difference]: Without dead ends: 66 [2022-11-16 12:33:21,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:33:21,368 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 111 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:21,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 42 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:33:21,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-16 12:33:21,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-16 12:33:21,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 65 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:21,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-11-16 12:33:21,373 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 34 [2022-11-16 12:33:21,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:21,373 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-11-16 12:33:21,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:21,374 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-11-16 12:33:21,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 12:33:21,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:21,378 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:21,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:21,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 12:33:21,584 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:21,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:21,584 INFO L85 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2022-11-16 12:33:21,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:21,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989385735] [2022-11-16 12:33:21,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:21,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:33:21,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:21,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989385735] [2022-11-16 12:33:21,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989385735] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:21,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090249956] [2022-11-16 12:33:21,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:33:21,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:21,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:21,848 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:21,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:33:21,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:33:21,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:33:21,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:33:21,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:21,971 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:33:21,971 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:33:21,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:33:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:33:22,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:33:22,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090249956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:22,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:22,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2022-11-16 12:33:22,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128015046] [2022-11-16 12:33:22,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:22,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:33:22,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:22,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:33:22,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:33:22,439 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 9 states, 8 states have (on average 8.625) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:22,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:22,543 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2022-11-16 12:33:22,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:33:22,544 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.625) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-16 12:33:22,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:22,545 INFO L225 Difference]: With dead ends: 158 [2022-11-16 12:33:22,546 INFO L226 Difference]: Without dead ends: 158 [2022-11-16 12:33:22,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:33:22,547 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 43 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:22,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 75 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:33:22,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-16 12:33:22,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2022-11-16 12:33:22,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.1517241379310346) internal successors, (167), 149 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:22,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 167 transitions. [2022-11-16 12:33:22,554 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 167 transitions. Word has length 39 [2022-11-16 12:33:22,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:22,555 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 167 transitions. [2022-11-16 12:33:22,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.625) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:22,555 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 167 transitions. [2022-11-16 12:33:22,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 12:33:22,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:22,556 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:22,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:22,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 12:33:22,757 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:22,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:22,758 INFO L85 PathProgramCache]: Analyzing trace with hash -890031373, now seen corresponding path program 1 times [2022-11-16 12:33:22,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:22,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661066290] [2022-11-16 12:33:22,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:22,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 19 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:33:22,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:22,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661066290] [2022-11-16 12:33:22,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661066290] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:22,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542249588] [2022-11-16 12:33:22,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:22,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:22,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:22,911 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:22,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:33:22,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:22,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:33:22,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:33:23,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:33:23,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542249588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:23,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:23,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-11-16 12:33:23,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157437481] [2022-11-16 12:33:23,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:23,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:33:23,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:23,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:33:23,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:33:23,281 INFO L87 Difference]: Start difference. First operand 150 states and 167 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:23,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:23,560 INFO L93 Difference]: Finished difference Result 165 states and 178 transitions. [2022-11-16 12:33:23,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:33:23,560 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-16 12:33:23,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:23,561 INFO L225 Difference]: With dead ends: 165 [2022-11-16 12:33:23,561 INFO L226 Difference]: Without dead ends: 165 [2022-11-16 12:33:23,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 73 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:33:23,562 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 197 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:23,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 80 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:33:23,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-16 12:33:23,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 143. [2022-11-16 12:33:23,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.1304347826086956) internal successors, (156), 142 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:23,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 156 transitions. [2022-11-16 12:33:23,566 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 156 transitions. Word has length 42 [2022-11-16 12:33:23,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:23,566 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 156 transitions. [2022-11-16 12:33:23,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:23,567 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 156 transitions. [2022-11-16 12:33:23,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-16 12:33:23,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:23,567 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:23,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:23,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:33:23,773 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:23,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:23,774 INFO L85 PathProgramCache]: Analyzing trace with hash -255177540, now seen corresponding path program 2 times [2022-11-16 12:33:23,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:23,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731898075] [2022-11-16 12:33:23,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:23,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 12:33:23,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:23,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731898075] [2022-11-16 12:33:23,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731898075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:23,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736251648] [2022-11-16 12:33:23,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:33:23,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:23,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:23,939 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:23,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:33:24,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:33:24,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:33:24,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:33:24,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:33:24,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:24,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-16 12:33:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:33:24,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736251648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:24,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:24,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2022-11-16 12:33:24,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685443376] [2022-11-16 12:33:24,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:24,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 12:33:24,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:24,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 12:33:24,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:33:24,593 INFO L87 Difference]: Start difference. First operand 143 states and 156 transitions. Second operand has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:24,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:24,792 INFO L93 Difference]: Finished difference Result 153 states and 163 transitions. [2022-11-16 12:33:24,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:33:24,793 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-16 12:33:24,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:24,794 INFO L225 Difference]: With dead ends: 153 [2022-11-16 12:33:24,794 INFO L226 Difference]: Without dead ends: 153 [2022-11-16 12:33:24,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:33:24,795 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 187 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:24,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 108 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:33:24,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-16 12:33:24,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2022-11-16 12:33:24,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.119718309859155) internal successors, (159), 146 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:24,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 159 transitions. [2022-11-16 12:33:24,798 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 159 transitions. Word has length 49 [2022-11-16 12:33:24,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:24,799 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 159 transitions. [2022-11-16 12:33:24,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:24,799 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 159 transitions. [2022-11-16 12:33:24,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 12:33:24,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:24,799 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-11-16 12:33:24,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:25,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:33:25,005 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:25,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:25,006 INFO L85 PathProgramCache]: Analyzing trace with hash 11435127, now seen corresponding path program 2 times [2022-11-16 12:33:25,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:25,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062491556] [2022-11-16 12:33:25,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:25,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 27 proven. 175 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:33:25,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:25,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062491556] [2022-11-16 12:33:25,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062491556] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:25,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179807936] [2022-11-16 12:33:25,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:33:25,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:25,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:25,225 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:25,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:33:25,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:33:25,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:33:25,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:33:25,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:33:25,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:33:25,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179807936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:25,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:25,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-11-16 12:33:25,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274214477] [2022-11-16 12:33:25,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:25,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:33:25,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:25,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:33:25,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:33:25,723 INFO L87 Difference]: Start difference. First operand 147 states and 159 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:26,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:26,265 INFO L93 Difference]: Finished difference Result 199 states and 209 transitions. [2022-11-16 12:33:26,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 12:33:26,265 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-16 12:33:26,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:26,267 INFO L225 Difference]: With dead ends: 199 [2022-11-16 12:33:26,267 INFO L226 Difference]: Without dead ends: 199 [2022-11-16 12:33:26,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 114 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=401, Invalid=1005, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 12:33:26,268 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 324 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:26,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 105 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:33:26,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-16 12:33:26,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 145. [2022-11-16 12:33:26,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.1) internal successors, (154), 144 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:26,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 154 transitions. [2022-11-16 12:33:26,272 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 154 transitions. Word has length 64 [2022-11-16 12:33:26,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:26,273 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 154 transitions. [2022-11-16 12:33:26,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:26,273 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 154 transitions. [2022-11-16 12:33:26,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-16 12:33:26,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:26,274 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-16 12:33:26,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:26,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:26,480 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:26,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:26,481 INFO L85 PathProgramCache]: Analyzing trace with hash -867962629, now seen corresponding path program 3 times [2022-11-16 12:33:26,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:26,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123634290] [2022-11-16 12:33:26,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:26,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:26,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:26,758 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 30 proven. 133 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 12:33:26,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:26,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123634290] [2022-11-16 12:33:26,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123634290] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:26,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398643226] [2022-11-16 12:33:26,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:33:26,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:26,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:26,760 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:26,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:33:26,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:33:26,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:33:26,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:33:26,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:26,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:33:26,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 12:33:26,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:33:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-16 12:33:27,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:33:27,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398643226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:33:27,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:33:27,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2022-11-16 12:33:27,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319801787] [2022-11-16 12:33:27,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:33:27,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:33:27,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:27,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:33:27,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:33:27,236 INFO L87 Difference]: Start difference. First operand 145 states and 154 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:27,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:27,281 INFO L93 Difference]: Finished difference Result 143 states and 152 transitions. [2022-11-16 12:33:27,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:33:27,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-11-16 12:33:27,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:27,283 INFO L225 Difference]: With dead ends: 143 [2022-11-16 12:33:27,283 INFO L226 Difference]: Without dead ends: 143 [2022-11-16 12:33:27,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:33:27,284 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 46 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:27,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 35 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:33:27,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-16 12:33:27,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2022-11-16 12:33:27,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.0648148148148149) internal successors, (115), 110 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:27,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2022-11-16 12:33:27,288 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 75 [2022-11-16 12:33:27,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:27,288 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2022-11-16 12:33:27,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:27,289 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2022-11-16 12:33:27,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-16 12:33:27,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:27,290 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:27,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:27,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:27,495 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:27,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:27,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1660735401, now seen corresponding path program 1 times [2022-11-16 12:33:27,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:27,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879611814] [2022-11-16 12:33:27,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:27,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:27,746 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 30 proven. 133 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 12:33:27,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:27,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879611814] [2022-11-16 12:33:27,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879611814] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:27,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726330192] [2022-11-16 12:33:27,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:27,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:27,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:27,748 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:27,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:33:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:27,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:33:27,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:28,042 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 57 proven. 106 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 12:33:28,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 57 proven. 106 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 12:33:28,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726330192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:28,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:28,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 12:33:28,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765100414] [2022-11-16 12:33:28,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:28,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:33:28,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:28,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:33:28,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:33:28,193 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:28,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:28,566 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2022-11-16 12:33:28,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:33:28,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-16 12:33:28,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:28,567 INFO L225 Difference]: With dead ends: 113 [2022-11-16 12:33:28,567 INFO L226 Difference]: Without dead ends: 113 [2022-11-16 12:33:28,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 148 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2022-11-16 12:33:28,568 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 105 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:28,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 100 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:33:28,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-16 12:33:28,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-11-16 12:33:28,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.0462962962962963) internal successors, (113), 110 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:28,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2022-11-16 12:33:28,571 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 80 [2022-11-16 12:33:28,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:28,572 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2022-11-16 12:33:28,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:28,572 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2022-11-16 12:33:28,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-16 12:33:28,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:28,573 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:28,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:28,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 12:33:28,781 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:28,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:28,781 INFO L85 PathProgramCache]: Analyzing trace with hash 283151040, now seen corresponding path program 2 times [2022-11-16 12:33:28,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:28,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364700202] [2022-11-16 12:33:28,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:28,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-16 12:33:29,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:29,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364700202] [2022-11-16 12:33:29,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364700202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:29,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148430336] [2022-11-16 12:33:29,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:33:29,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:29,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:29,005 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:29,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:33:29,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:33:29,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:33:29,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:33:29,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:29,709 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_24| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_19| Int) (v_ArrVal_421 Int) (v_ArrVal_420 Int) (v_ArrVal_419 Int)) (and (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_24| v_ArrVal_421) |v_ULTIMATE.start_main_~#mask~0#1.base_19|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_24|) 0) (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_24| v_ArrVal_420) |v_ULTIMATE.start_main_~#mask~0#1.base_19| v_ArrVal_419) |v_ULTIMATE.start_main_~#b~0#1.base_24| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_19| 0)))) is different from true [2022-11-16 12:33:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-11-16 12:33:29,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:33:29,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148430336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:33:29,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:33:29,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-11-16 12:33:29,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145941566] [2022-11-16 12:33:29,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:33:29,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:33:29,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:29,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:33:29,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=29, Unknown=1, NotChecked=10, Total=56 [2022-11-16 12:33:29,713 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:29,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:29,714 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2022-11-16 12:33:29,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:33:29,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-11-16 12:33:29,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:29,715 INFO L225 Difference]: With dead ends: 110 [2022-11-16 12:33:29,715 INFO L226 Difference]: Without dead ends: 94 [2022-11-16 12:33:29,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=29, Unknown=1, NotChecked=10, Total=56 [2022-11-16 12:33:29,716 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:29,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 19 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2022-11-16 12:33:29,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-16 12:33:29,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-11-16 12:33:29,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 93 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:29,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-11-16 12:33:29,719 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 85 [2022-11-16 12:33:29,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:29,720 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-11-16 12:33:29,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:29,720 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-11-16 12:33:29,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-16 12:33:29,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:29,721 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-11-16 12:33:29,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:29,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:29,927 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:29,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:29,927 INFO L85 PathProgramCache]: Analyzing trace with hash -875547996, now seen corresponding path program 3 times [2022-11-16 12:33:29,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:29,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140082682] [2022-11-16 12:33:29,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:29,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-16 12:33:30,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:30,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140082682] [2022-11-16 12:33:30,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140082682] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:30,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173720718] [2022-11-16 12:33:30,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:33:30,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:30,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:30,131 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:30,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:33:30,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:33:30,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:33:30,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:33:30,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:30,251 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:33:30,251 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:33:30,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:33:30,658 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 3 proven. 227 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-11-16 12:33:30,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 230 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-11-16 12:33:30,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173720718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:30,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:30,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-11-16 12:33:30,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035369815] [2022-11-16 12:33:30,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:30,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:33:30,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:30,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:33:30,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:33:30,908 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 17 states, 16 states have (on average 5.4375) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:31,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:31,230 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2022-11-16 12:33:31,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:33:31,231 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.4375) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-11-16 12:33:31,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:31,231 INFO L225 Difference]: With dead ends: 117 [2022-11-16 12:33:31,231 INFO L226 Difference]: Without dead ends: 117 [2022-11-16 12:33:31,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:33:31,232 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 196 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:31,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 64 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:33:31,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-16 12:33:31,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 93. [2022-11-16 12:33:31,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:31,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-11-16 12:33:31,235 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 91 [2022-11-16 12:33:31,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:31,235 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-11-16 12:33:31,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.4375) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:31,236 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-11-16 12:33:31,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-16 12:33:31,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:31,236 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-11-16 12:33:31,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-16 12:33:31,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 12:33:31,442 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:31,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:31,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1372184046, now seen corresponding path program 1 times [2022-11-16 12:33:31,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:31,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539202768] [2022-11-16 12:33:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:31,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:31,892 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-16 12:33:31,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:31,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539202768] [2022-11-16 12:33:31,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539202768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:31,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397493983] [2022-11-16 12:33:31,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:31,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:31,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:31,895 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:31,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:33:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:32,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:33:32,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:32,046 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:33:32,046 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:33:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-16 12:33:32,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-16 12:33:33,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397493983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:33,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:33,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2022-11-16 12:33:33,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764816700] [2022-11-16 12:33:33,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:33,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:33:33,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:33,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:33:33,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:33:33,073 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:33,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:33,605 INFO L93 Difference]: Finished difference Result 159 states and 166 transitions. [2022-11-16 12:33:33,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:33:33,605 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-16 12:33:33,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:33,606 INFO L225 Difference]: With dead ends: 159 [2022-11-16 12:33:33,607 INFO L226 Difference]: Without dead ends: 159 [2022-11-16 12:33:33,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:33:33,608 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 281 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:33,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 88 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:33:33,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-16 12:33:33,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 123. [2022-11-16 12:33:33,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 122 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:33,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2022-11-16 12:33:33,612 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 92 [2022-11-16 12:33:33,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:33,612 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2022-11-16 12:33:33,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:33,613 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2022-11-16 12:33:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-16 12:33:33,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:33,614 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-11-16 12:33:33,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:33,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 12:33:33,819 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:33,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:33,820 INFO L85 PathProgramCache]: Analyzing trace with hash -285868558, now seen corresponding path program 2 times [2022-11-16 12:33:33,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:33,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931277490] [2022-11-16 12:33:33,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:33,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 84 proven. 793 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-16 12:33:34,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:34,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931277490] [2022-11-16 12:33:34,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931277490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:34,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407418249] [2022-11-16 12:33:34,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:33:34,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:34,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:34,169 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:34,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 12:33:34,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:33:34,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:33:34,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:33:34,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 42 proven. 830 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-16 12:33:35,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:35,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-16 12:33:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 42 proven. 830 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-16 12:33:36,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407418249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:36,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:36,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2022-11-16 12:33:36,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250816462] [2022-11-16 12:33:36,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:36,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 12:33:36,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:36,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 12:33:36,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 12:33:36,458 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand has 37 states, 37 states have (on average 5.648648648648648) internal successors, (209), 37 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:38,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:38,356 INFO L93 Difference]: Finished difference Result 167 states and 175 transitions. [2022-11-16 12:33:38,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-16 12:33:38,357 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.648648648648648) internal successors, (209), 37 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2022-11-16 12:33:38,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:38,358 INFO L225 Difference]: With dead ends: 167 [2022-11-16 12:33:38,358 INFO L226 Difference]: Without dead ends: 167 [2022-11-16 12:33:38,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1268, Invalid=4432, Unknown=0, NotChecked=0, Total=5700 [2022-11-16 12:33:38,363 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 231 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:38,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 122 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:33:38,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-16 12:33:38,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 155. [2022-11-16 12:33:38,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0584415584415585) internal successors, (163), 154 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:38,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 163 transitions. [2022-11-16 12:33:38,373 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 163 transitions. Word has length 122 [2022-11-16 12:33:38,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:38,373 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 163 transitions. [2022-11-16 12:33:38,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.648648648648648) internal successors, (209), 37 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:38,374 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 163 transitions. [2022-11-16 12:33:38,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-16 12:33:38,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:38,379 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2022-11-16 12:33:38,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:38,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 12:33:38,585 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:38,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:38,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1906495009, now seen corresponding path program 3 times [2022-11-16 12:33:38,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:38,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632353526] [2022-11-16 12:33:38,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:38,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:38,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 865 proven. 297 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-11-16 12:33:39,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:39,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632353526] [2022-11-16 12:33:39,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632353526] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:39,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647212069] [2022-11-16 12:33:39,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:33:39,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:39,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:39,048 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:39,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 12:33:39,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-16 12:33:39,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:33:39,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:33:39,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:39,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 936 proven. 249 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-11-16 12:33:39,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 807 proven. 378 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-11-16 12:33:40,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647212069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:40,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:40,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 36 [2022-11-16 12:33:40,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949145386] [2022-11-16 12:33:40,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:40,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 12:33:40,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:40,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 12:33:40,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 12:33:40,260 INFO L87 Difference]: Start difference. First operand 155 states and 163 transitions. Second operand has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:41,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:41,502 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2022-11-16 12:33:41,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 12:33:41,503 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2022-11-16 12:33:41,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:41,504 INFO L225 Difference]: With dead ends: 161 [2022-11-16 12:33:41,504 INFO L226 Difference]: Without dead ends: 161 [2022-11-16 12:33:41,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 271 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=832, Invalid=3328, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 12:33:41,507 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 464 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:41,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 89 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:33:41,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-16 12:33:41,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 155. [2022-11-16 12:33:41,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0454545454545454) internal successors, (161), 154 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:41,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 161 transitions. [2022-11-16 12:33:41,511 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 161 transitions. Word has length 149 [2022-11-16 12:33:41,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:41,512 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 161 transitions. [2022-11-16 12:33:41,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:41,512 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 161 transitions. [2022-11-16 12:33:41,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-16 12:33:41,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:41,514 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 24, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2022-11-16 12:33:41,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:41,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 12:33:41,720 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:41,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:41,721 INFO L85 PathProgramCache]: Analyzing trace with hash -874087090, now seen corresponding path program 4 times [2022-11-16 12:33:41,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:41,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455078735] [2022-11-16 12:33:41,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:41,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 118 proven. 1328 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-11-16 12:33:42,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:42,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455078735] [2022-11-16 12:33:42,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455078735] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:42,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687648423] [2022-11-16 12:33:42,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:33:42,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:42,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:42,236 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:42,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 12:33:42,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:33:42,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:33:42,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:33:42,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 283 proven. 1201 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-16 12:33:43,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 283 proven. 1201 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-16 12:33:43,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687648423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:43,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:43,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 35 [2022-11-16 12:33:43,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872683518] [2022-11-16 12:33:43,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:43,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 12:33:43,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:43,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 12:33:43,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=857, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 12:33:43,492 INFO L87 Difference]: Start difference. First operand 155 states and 161 transitions. Second operand has 35 states, 35 states have (on average 6.428571428571429) internal successors, (225), 35 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:45,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:45,178 INFO L93 Difference]: Finished difference Result 401 states and 422 transitions. [2022-11-16 12:33:45,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-16 12:33:45,178 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.428571428571429) internal successors, (225), 35 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2022-11-16 12:33:45,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:45,180 INFO L225 Difference]: With dead ends: 401 [2022-11-16 12:33:45,180 INFO L226 Difference]: Without dead ends: 401 [2022-11-16 12:33:45,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 280 SyntacticMatches, 8 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4517 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3118, Invalid=7594, Unknown=0, NotChecked=0, Total=10712 [2022-11-16 12:33:45,183 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 329 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:45,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 98 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:33:45,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-11-16 12:33:45,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 390. [2022-11-16 12:33:45,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.056555269922879) internal successors, (411), 389 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:45,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 411 transitions. [2022-11-16 12:33:45,191 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 411 transitions. Word has length 154 [2022-11-16 12:33:45,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:45,192 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 411 transitions. [2022-11-16 12:33:45,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.428571428571429) internal successors, (225), 35 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:45,192 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 411 transitions. [2022-11-16 12:33:45,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-11-16 12:33:45,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:45,197 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 49, 49, 49, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-11-16 12:33:45,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:45,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 12:33:45,404 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:45,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:45,404 INFO L85 PathProgramCache]: Analyzing trace with hash 747006490, now seen corresponding path program 5 times [2022-11-16 12:33:45,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:45,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931335091] [2022-11-16 12:33:45,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:45,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6738 backedges. 3878 proven. 218 refuted. 0 times theorem prover too weak. 2642 trivial. 0 not checked. [2022-11-16 12:33:46,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:46,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931335091] [2022-11-16 12:33:46,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931335091] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:46,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770196188] [2022-11-16 12:33:46,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:33:46,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:46,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:46,499 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:46,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 12:33:46,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-16 12:33:46,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:33:46,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:33:46,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6738 backedges. 3685 proven. 501 refuted. 0 times theorem prover too weak. 2552 trivial. 0 not checked. [2022-11-16 12:33:47,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6738 backedges. 3798 proven. 388 refuted. 0 times theorem prover too weak. 2552 trivial. 0 not checked. [2022-11-16 12:33:47,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770196188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:47,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:47,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 38 [2022-11-16 12:33:47,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353593066] [2022-11-16 12:33:47,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:47,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 12:33:47,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:47,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 12:33:47,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 12:33:47,718 INFO L87 Difference]: Start difference. First operand 390 states and 411 transitions. Second operand has 38 states, 38 states have (on average 5.078947368421052) internal successors, (193), 38 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:48,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:48,838 INFO L93 Difference]: Finished difference Result 390 states and 405 transitions. [2022-11-16 12:33:48,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 12:33:48,838 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.078947368421052) internal successors, (193), 38 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 314 [2022-11-16 12:33:48,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:48,840 INFO L225 Difference]: With dead ends: 390 [2022-11-16 12:33:48,841 INFO L226 Difference]: Without dead ends: 390 [2022-11-16 12:33:48,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 603 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=866, Invalid=3040, Unknown=0, NotChecked=0, Total=3906 [2022-11-16 12:33:48,843 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 144 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:48,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 95 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:33:48,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-16 12:33:48,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2022-11-16 12:33:48,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0411311053984575) internal successors, (405), 389 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 405 transitions. [2022-11-16 12:33:48,852 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 405 transitions. Word has length 314 [2022-11-16 12:33:48,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:48,853 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 405 transitions. [2022-11-16 12:33:48,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.078947368421052) internal successors, (193), 38 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:48,853 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 405 transitions. [2022-11-16 12:33:48,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-11-16 12:33:48,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:48,860 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 54, 54, 54, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-11-16 12:33:48,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:49,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 12:33:49,072 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:49,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:49,072 INFO L85 PathProgramCache]: Analyzing trace with hash -525875421, now seen corresponding path program 6 times [2022-11-16 12:33:49,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:49,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722829371] [2022-11-16 12:33:49,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:49,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8073 backedges. 4649 proven. 311 refuted. 0 times theorem prover too weak. 3113 trivial. 0 not checked. [2022-11-16 12:33:50,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:50,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722829371] [2022-11-16 12:33:50,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722829371] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:50,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590612783] [2022-11-16 12:33:50,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:33:50,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:50,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:50,324 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:50,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 12:33:50,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-11-16 12:33:50,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:33:50,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:33:50,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8073 backedges. 4943 proven. 852 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2022-11-16 12:33:51,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8073 backedges. 5125 proven. 670 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2022-11-16 12:33:52,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590612783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:52,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:52,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 43 [2022-11-16 12:33:52,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932436890] [2022-11-16 12:33:52,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:52,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 12:33:52,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:52,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 12:33:52,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=1462, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 12:33:52,027 INFO L87 Difference]: Start difference. First operand 390 states and 405 transitions. Second operand has 43 states, 43 states have (on average 5.232558139534884) internal successors, (225), 43 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:53,641 INFO L93 Difference]: Finished difference Result 390 states and 400 transitions. [2022-11-16 12:33:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 12:33:53,642 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.232558139534884) internal successors, (225), 43 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 339 [2022-11-16 12:33:53,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:53,644 INFO L225 Difference]: With dead ends: 390 [2022-11-16 12:33:53,644 INFO L226 Difference]: Without dead ends: 390 [2022-11-16 12:33:53,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 649 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1250, Invalid=4602, Unknown=0, NotChecked=0, Total=5852 [2022-11-16 12:33:53,647 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 169 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:53,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 107 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1389 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:33:53,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-16 12:33:53,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2022-11-16 12:33:53,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0282776349614395) internal successors, (400), 389 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:53,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 400 transitions. [2022-11-16 12:33:53,656 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 400 transitions. Word has length 339 [2022-11-16 12:33:53,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:53,657 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 400 transitions. [2022-11-16 12:33:53,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.232558139534884) internal successors, (225), 43 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:53,657 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 400 transitions. [2022-11-16 12:33:53,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-16 12:33:53,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:53,664 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 58, 58, 58, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-11-16 12:33:53,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:53,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 12:33:53,871 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:53,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:53,872 INFO L85 PathProgramCache]: Analyzing trace with hash -814421421, now seen corresponding path program 7 times [2022-11-16 12:33:53,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:53,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297144764] [2022-11-16 12:33:53,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:53,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9231 backedges. 5360 proven. 419 refuted. 0 times theorem prover too weak. 3452 trivial. 0 not checked. [2022-11-16 12:33:55,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:33:55,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297144764] [2022-11-16 12:33:55,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297144764] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:33:55,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514554380] [2022-11-16 12:33:55,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:33:55,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:55,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:33:55,265 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:33:55,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 12:33:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:55,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:33:55,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9231 backedges. 6271 proven. 1132 refuted. 0 times theorem prover too weak. 1828 trivial. 0 not checked. [2022-11-16 12:33:56,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:56,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9231 backedges. 6271 proven. 1132 refuted. 0 times theorem prover too weak. 1828 trivial. 0 not checked. [2022-11-16 12:33:56,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514554380] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:56,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:33:56,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 41 [2022-11-16 12:33:56,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399405834] [2022-11-16 12:33:56,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:56,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-16 12:33:56,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:33:56,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-16 12:33:56,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 12:33:56,748 INFO L87 Difference]: Start difference. First operand 390 states and 400 transitions. Second operand has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:58,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:58,847 INFO L93 Difference]: Finished difference Result 390 states and 396 transitions. [2022-11-16 12:33:58,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-16 12:33:58,848 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 359 [2022-11-16 12:33:58,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:58,849 INFO L225 Difference]: With dead ends: 390 [2022-11-16 12:33:58,849 INFO L226 Difference]: Without dead ends: 390 [2022-11-16 12:33:58,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 691 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1270, Invalid=5536, Unknown=0, NotChecked=0, Total=6806 [2022-11-16 12:33:58,851 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 140 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:58,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 165 Invalid, 1899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1880 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 12:33:58,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-16 12:33:58,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2022-11-16 12:33:58,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0179948586118253) internal successors, (396), 389 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:58,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 396 transitions. [2022-11-16 12:33:58,862 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 396 transitions. Word has length 359 [2022-11-16 12:33:58,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:58,862 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 396 transitions. [2022-11-16 12:33:58,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:58,863 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 396 transitions. [2022-11-16 12:33:58,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-11-16 12:33:58,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:58,865 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 61, 61, 61, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-11-16 12:33:58,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-16 12:33:59,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:33:59,072 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:33:59,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:59,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1672251698, now seen corresponding path program 8 times [2022-11-16 12:33:59,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:33:59,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619029430] [2022-11-16 12:33:59,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:59,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:33:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 5981 proven. 542 refuted. 0 times theorem prover too weak. 3629 trivial. 0 not checked. [2022-11-16 12:34:00,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:34:00,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619029430] [2022-11-16 12:34:00,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619029430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:00,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123172143] [2022-11-16 12:34:00,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:34:00,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:34:00,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:34:00,611 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:34:00,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 12:34:00,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:34:00,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:34:00,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 1206 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:34:00,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 7207 proven. 1646 refuted. 0 times theorem prover too weak. 1299 trivial. 0 not checked. [2022-11-16 12:34:01,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 7207 proven. 1646 refuted. 0 times theorem prover too weak. 1299 trivial. 0 not checked. [2022-11-16 12:34:02,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123172143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:34:02,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:34:02,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 46 [2022-11-16 12:34:02,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061735916] [2022-11-16 12:34:02,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:02,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 12:34:02,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:34:02,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 12:34:02,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1708, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 12:34:02,547 INFO L87 Difference]: Start difference. First operand 390 states and 396 transitions. Second operand has 46 states, 46 states have (on average 6.086956521739131) internal successors, (280), 46 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:05,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:05,799 INFO L93 Difference]: Finished difference Result 390 states and 393 transitions. [2022-11-16 12:34:05,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-16 12:34:05,799 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 6.086956521739131) internal successors, (280), 46 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 374 [2022-11-16 12:34:05,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:05,801 INFO L225 Difference]: With dead ends: 390 [2022-11-16 12:34:05,801 INFO L226 Difference]: Without dead ends: 390 [2022-11-16 12:34:05,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 717 SyntacticMatches, 8 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2340 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1739, Invalid=7767, Unknown=0, NotChecked=0, Total=9506 [2022-11-16 12:34:05,804 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 170 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 3108 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 3123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:05,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 220 Invalid, 3123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3108 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 12:34:05,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-16 12:34:05,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2022-11-16 12:34:05,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0102827763496145) internal successors, (393), 389 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:05,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 393 transitions. [2022-11-16 12:34:05,812 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 393 transitions. Word has length 374 [2022-11-16 12:34:05,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:05,813 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 393 transitions. [2022-11-16 12:34:05,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.086956521739131) internal successors, (280), 46 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:05,814 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 393 transitions. [2022-11-16 12:34:05,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2022-11-16 12:34:05,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:05,816 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 63, 63, 63, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-11-16 12:34:05,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-16 12:34:06,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-16 12:34:06,022 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:34:06,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:06,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1649762294, now seen corresponding path program 9 times [2022-11-16 12:34:06,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:34:06,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065896183] [2022-11-16 12:34:06,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:06,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:34:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 7290 proven. 2602 refuted. 0 times theorem prover too weak. 899 trivial. 0 not checked. [2022-11-16 12:34:07,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:34:07,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065896183] [2022-11-16 12:34:07,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065896183] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:07,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677884893] [2022-11-16 12:34:07,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:34:07,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:34:07,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:34:07,359 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:34:07,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 12:34:07,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-16 12:34:07,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:34:07,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:34:07,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:07,693 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:34:07,693 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:34:09,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 3163 refuted. 0 times theorem prover too weak. 7628 trivial. 0 not checked. [2022-11-16 12:34:09,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:12,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 3163 refuted. 0 times theorem prover too weak. 7628 trivial. 0 not checked. [2022-11-16 12:34:12,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677884893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:34:12,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:34:12,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 14] total 47 [2022-11-16 12:34:12,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424048748] [2022-11-16 12:34:12,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:12,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-16 12:34:12,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:34:12,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-16 12:34:12,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=1744, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 12:34:12,209 INFO L87 Difference]: Start difference. First operand 390 states and 393 transitions. Second operand has 47 states, 47 states have (on average 6.191489361702128) internal successors, (291), 47 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:17,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:17,533 INFO L93 Difference]: Finished difference Result 522 states and 535 transitions. [2022-11-16 12:34:17,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-16 12:34:17,533 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 6.191489361702128) internal successors, (291), 47 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 384 [2022-11-16 12:34:17,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:17,536 INFO L225 Difference]: With dead ends: 522 [2022-11-16 12:34:17,536 INFO L226 Difference]: Without dead ends: 522 [2022-11-16 12:34:17,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 742 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5279 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4623, Invalid=15117, Unknown=0, NotChecked=0, Total=19740 [2022-11-16 12:34:17,539 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 802 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:17,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [802 Valid, 200 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 12:34:17,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-11-16 12:34:17,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 450. [2022-11-16 12:34:17,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.0311804008908685) internal successors, (463), 449 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:17,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 463 transitions. [2022-11-16 12:34:17,549 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 463 transitions. Word has length 384 [2022-11-16 12:34:17,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:17,549 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 463 transitions. [2022-11-16 12:34:17,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 6.191489361702128) internal successors, (291), 47 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:17,550 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 463 transitions. [2022-11-16 12:34:17,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2022-11-16 12:34:17,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:17,553 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 76, 76, 76, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-11-16 12:34:17,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-16 12:34:17,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:34:17,759 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:34:17,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:17,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2070971837, now seen corresponding path program 10 times [2022-11-16 12:34:17,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:34:17,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175656105] [2022-11-16 12:34:17,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:17,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:34:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 417 proven. 13839 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2022-11-16 12:34:19,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:34:19,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175656105] [2022-11-16 12:34:19,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175656105] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:19,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268539580] [2022-11-16 12:34:19,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:34:19,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:34:19,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:34:19,295 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:34:19,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 12:34:20,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:34:20,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:34:20,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 12:34:20,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 1329 proven. 13224 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2022-11-16 12:34:21,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 1329 proven. 13224 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2022-11-16 12:34:23,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268539580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:34:23,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:34:23,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 35, 35] total 70 [2022-11-16 12:34:23,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810283111] [2022-11-16 12:34:23,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:23,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-16 12:34:23,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:34:23,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-16 12:34:23,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1339, Invalid=3491, Unknown=0, NotChecked=0, Total=4830 [2022-11-16 12:34:23,100 INFO L87 Difference]: Start difference. First operand 450 states and 463 transitions. Second operand has 70 states, 70 states have (on average 6.642857142857143) internal successors, (465), 70 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:33,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:33,400 INFO L93 Difference]: Finished difference Result 1468 states and 1557 transitions. [2022-11-16 12:34:33,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 275 states. [2022-11-16 12:34:33,401 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 6.642857142857143) internal successors, (465), 70 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 449 [2022-11-16 12:34:33,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:33,438 INFO L225 Difference]: With dead ends: 1468 [2022-11-16 12:34:33,438 INFO L226 Difference]: Without dead ends: 1468 [2022-11-16 12:34:33,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1192 GetRequests, 841 SyntacticMatches, 12 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63260 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=34492, Invalid=81448, Unknown=0, NotChecked=0, Total=115940 [2022-11-16 12:34:33,448 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 797 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2413 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:33,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [797 Valid, 176 Invalid, 2525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2413 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-16 12:34:33,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2022-11-16 12:34:33,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1457. [2022-11-16 12:34:33,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 1.0618131868131868) internal successors, (1546), 1456 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:33,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 1546 transitions. [2022-11-16 12:34:33,482 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 1546 transitions. Word has length 449 [2022-11-16 12:34:33,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:33,483 INFO L495 AbstractCegarLoop]: Abstraction has 1457 states and 1546 transitions. [2022-11-16 12:34:33,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 6.642857142857143) internal successors, (465), 70 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:33,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 1546 transitions. [2022-11-16 12:34:33,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1077 [2022-11-16 12:34:33,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:33,496 INFO L195 NwaCegarLoop]: trace histogram [187, 187, 186, 186, 186, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1] [2022-11-16 12:34:33,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 12:34:33,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-16 12:34:33,705 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:34:33,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:33,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1138886418, now seen corresponding path program 11 times [2022-11-16 12:34:33,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:34:33,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312179803] [2022-11-16 12:34:33,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:33,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:34:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:37,879 INFO L134 CoverageAnalysis]: Checked inductivity of 91673 backedges. 34458 proven. 833 refuted. 0 times theorem prover too weak. 56382 trivial. 0 not checked. [2022-11-16 12:34:37,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:34:37,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312179803] [2022-11-16 12:34:37,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312179803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:37,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254532712] [2022-11-16 12:34:37,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:34:37,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:34:37,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:34:37,882 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:34:37,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 12:34:38,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-11-16 12:34:38,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:34:38,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 12:34:38,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 91673 backedges. 48319 proven. 3482 refuted. 0 times theorem prover too weak. 39872 trivial. 0 not checked. [2022-11-16 12:34:39,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 91673 backedges. 49198 proven. 2603 refuted. 0 times theorem prover too weak. 39872 trivial. 0 not checked. [2022-11-16 12:34:40,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254532712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:34:40,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:34:40,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 65 [2022-11-16 12:34:40,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562427341] [2022-11-16 12:34:40,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:40,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-16 12:34:40,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:34:40,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-16 12:34:40,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=3430, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 12:34:40,988 INFO L87 Difference]: Start difference. First operand 1457 states and 1546 transitions. Second operand has 65 states, 65 states have (on average 5.369230769230769) internal successors, (349), 65 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:44,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:44,764 INFO L93 Difference]: Finished difference Result 1457 states and 1534 transitions. [2022-11-16 12:34:44,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-16 12:34:44,765 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 5.369230769230769) internal successors, (349), 65 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1076 [2022-11-16 12:34:44,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:44,770 INFO L225 Difference]: With dead ends: 1457 [2022-11-16 12:34:44,770 INFO L226 Difference]: Without dead ends: 1457 [2022-11-16 12:34:44,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2250 GetRequests, 2107 SyntacticMatches, 7 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4911 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3778, Invalid=15128, Unknown=0, NotChecked=0, Total=18906 [2022-11-16 12:34:44,773 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 244 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 3623 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 3653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:44,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 170 Invalid, 3653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3623 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 12:34:44,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2022-11-16 12:34:44,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1457. [2022-11-16 12:34:44,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 1.0535714285714286) internal successors, (1534), 1456 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:44,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 1534 transitions. [2022-11-16 12:34:44,800 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 1534 transitions. Word has length 1076 [2022-11-16 12:34:44,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:44,801 INFO L495 AbstractCegarLoop]: Abstraction has 1457 states and 1534 transitions. [2022-11-16 12:34:44,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 5.369230769230769) internal successors, (349), 65 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:44,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 1534 transitions. [2022-11-16 12:34:44,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1132 [2022-11-16 12:34:44,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:44,831 INFO L195 NwaCegarLoop]: trace histogram [198, 198, 197, 197, 197, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1] [2022-11-16 12:34:44,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 12:34:45,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-16 12:34:45,040 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:34:45,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:45,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1593275497, now seen corresponding path program 12 times [2022-11-16 12:34:45,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:34:45,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395308992] [2022-11-16 12:34:45,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:45,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:34:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 102431 backedges. 38226 proven. 1001 refuted. 0 times theorem prover too weak. 63204 trivial. 0 not checked. [2022-11-16 12:34:48,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:34:48,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395308992] [2022-11-16 12:34:48,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395308992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:34:48,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929944121] [2022-11-16 12:34:48,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:34:48,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:34:48,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:34:48,725 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:34:48,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 12:34:49,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2022-11-16 12:34:49,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:34:49,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 12:34:49,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:49,523 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:34:49,523 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:34:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 102431 backedges. 9527 proven. 20565 refuted. 0 times theorem prover too weak. 72339 trivial. 0 not checked. [2022-11-16 12:34:55,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:35:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 102431 backedges. 0 proven. 30092 refuted. 0 times theorem prover too weak. 72339 trivial. 0 not checked. [2022-11-16 12:35:02,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929944121] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:35:02,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:35:02,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19, 19] total 64 [2022-11-16 12:35:02,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086097184] [2022-11-16 12:35:02,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:35:02,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-16 12:35:02,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:35:02,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-16 12:35:02,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=3359, Unknown=0, NotChecked=0, Total=4032 [2022-11-16 12:35:02,185 INFO L87 Difference]: Start difference. First operand 1457 states and 1534 transitions. Second operand has 64 states, 64 states have (on average 4.890625) internal successors, (313), 64 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:17,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:17,272 INFO L93 Difference]: Finished difference Result 1665 states and 1746 transitions. [2022-11-16 12:35:17,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-11-16 12:35:17,273 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 4.890625) internal successors, (313), 64 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1131 [2022-11-16 12:35:17,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:17,276 INFO L225 Difference]: With dead ends: 1665 [2022-11-16 12:35:17,276 INFO L226 Difference]: Without dead ends: 1665 [2022-11-16 12:35:17,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2451 GetRequests, 2228 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15973 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=8366, Invalid=42034, Unknown=0, NotChecked=0, Total=50400 [2022-11-16 12:35:17,282 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3065 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 1919 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3065 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 2386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 1919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:17,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3065 Valid, 234 Invalid, 2386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 1919 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 12:35:17,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2022-11-16 12:35:17,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1592. [2022-11-16 12:35:17,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 1.0521684475172848) internal successors, (1674), 1591 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:17,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1674 transitions. [2022-11-16 12:35:17,311 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1674 transitions. Word has length 1131 [2022-11-16 12:35:17,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:17,312 INFO L495 AbstractCegarLoop]: Abstraction has 1592 states and 1674 transitions. [2022-11-16 12:35:17,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 4.890625) internal successors, (313), 64 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:17,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1674 transitions. [2022-11-16 12:35:17,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1309 [2022-11-16 12:35:17,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:17,330 INFO L195 NwaCegarLoop]: trace histogram [232, 232, 231, 231, 231, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-11-16 12:35:17,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:17,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:35:17,544 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:35:17,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:17,545 INFO L85 PathProgramCache]: Analyzing trace with hash 738738834, now seen corresponding path program 13 times [2022-11-16 12:35:17,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:35:17,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220735912] [2022-11-16 12:35:17,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:35:17,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:35:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:35:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 139881 backedges. 64944 proven. 1184 refuted. 0 times theorem prover too weak. 73753 trivial. 0 not checked. [2022-11-16 12:35:23,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:35:23,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220735912] [2022-11-16 12:35:23,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220735912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:35:23,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637751724] [2022-11-16 12:35:23,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:35:23,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:35:23,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:35:23,196 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:35:23,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 12:35:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:35:24,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 3982 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 12:35:24,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 139881 backedges. 81118 proven. 5182 refuted. 0 times theorem prover too weak. 53581 trivial. 0 not checked. [2022-11-16 12:35:25,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:35:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 139881 backedges. 81118 proven. 5182 refuted. 0 times theorem prover too weak. 53581 trivial. 0 not checked. [2022-11-16 12:35:27,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637751724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:35:27,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:35:27,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 66 [2022-11-16 12:35:27,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175926828] [2022-11-16 12:35:27,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:35:27,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-16 12:35:27,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:35:27,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-16 12:35:27,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=704, Invalid=3586, Unknown=0, NotChecked=0, Total=4290 [2022-11-16 12:35:27,317 INFO L87 Difference]: Start difference. First operand 1592 states and 1674 transitions. Second operand has 66 states, 66 states have (on average 6.181818181818182) internal successors, (408), 66 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:34,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:34,294 INFO L93 Difference]: Finished difference Result 1592 states and 1663 transitions. [2022-11-16 12:35:34,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-11-16 12:35:34,294 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 6.181818181818182) internal successors, (408), 66 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1308 [2022-11-16 12:35:34,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:34,300 INFO L225 Difference]: With dead ends: 1592 [2022-11-16 12:35:34,300 INFO L226 Difference]: Without dead ends: 1592 [2022-11-16 12:35:34,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2747 GetRequests, 2569 SyntacticMatches, 12 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7258 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4910, Invalid=23146, Unknown=0, NotChecked=0, Total=28056 [2022-11-16 12:35:34,304 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 227 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 7138 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 7163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 7138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:34,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 252 Invalid, 7163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 7138 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-16 12:35:34,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2022-11-16 12:35:34,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1592. [2022-11-16 12:35:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 1.0452545568824638) internal successors, (1663), 1591 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:34,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1663 transitions. [2022-11-16 12:35:34,335 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1663 transitions. Word has length 1308 [2022-11-16 12:35:34,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:34,336 INFO L495 AbstractCegarLoop]: Abstraction has 1592 states and 1663 transitions. [2022-11-16 12:35:34,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 6.181818181818182) internal successors, (408), 66 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:34,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1663 transitions. [2022-11-16 12:35:34,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1354 [2022-11-16 12:35:34,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:34,365 INFO L195 NwaCegarLoop]: trace histogram [241, 241, 240, 240, 240, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-11-16 12:35:34,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:34,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:35:34,575 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:35:34,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:34,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1786428189, now seen corresponding path program 14 times [2022-11-16 12:35:34,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:35:34,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275751567] [2022-11-16 12:35:34,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:35:34,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:35:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:35:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 150672 backedges. 69671 proven. 1382 refuted. 0 times theorem prover too weak. 79619 trivial. 0 not checked. [2022-11-16 12:35:39,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:35:39,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275751567] [2022-11-16 12:35:39,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275751567] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:35:39,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201211878] [2022-11-16 12:35:39,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:35:39,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:35:39,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:35:39,390 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:35:39,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-16 12:35:40,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:35:40,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:35:40,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 4108 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 12:35:40,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 150672 backedges. 93912 proven. 6511 refuted. 0 times theorem prover too weak. 50249 trivial. 0 not checked. [2022-11-16 12:35:41,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:35:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 150672 backedges. 93912 proven. 6511 refuted. 0 times theorem prover too weak. 50249 trivial. 0 not checked. [2022-11-16 12:35:43,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201211878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:35:43,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:35:43,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 71 [2022-11-16 12:35:43,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492463057] [2022-11-16 12:35:43,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:35:43,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-16 12:35:43,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:35:43,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-16 12:35:43,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=807, Invalid=4163, Unknown=0, NotChecked=0, Total=4970 [2022-11-16 12:35:43,427 INFO L87 Difference]: Start difference. First operand 1592 states and 1663 transitions. Second operand has 71 states, 71 states have (on average 6.197183098591549) internal successors, (440), 71 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:50,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:50,803 INFO L93 Difference]: Finished difference Result 1674 states and 1735 transitions. [2022-11-16 12:35:50,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-11-16 12:35:50,803 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 6.197183098591549) internal successors, (440), 71 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1353 [2022-11-16 12:35:50,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:50,806 INFO L225 Difference]: With dead ends: 1674 [2022-11-16 12:35:50,806 INFO L226 Difference]: Without dead ends: 1674 [2022-11-16 12:35:50,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2854 GetRequests, 2655 SyntacticMatches, 13 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9165 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=6114, Invalid=29042, Unknown=0, NotChecked=0, Total=35156 [2022-11-16 12:35:50,809 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 229 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 6847 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 6871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 6847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:50,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 292 Invalid, 6871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 6847 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-16 12:35:50,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-11-16 12:35:50,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1664. [2022-11-16 12:35:50,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 1.0372820204449789) internal successors, (1725), 1663 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:50,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 1725 transitions. [2022-11-16 12:35:50,833 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 1725 transitions. Word has length 1353 [2022-11-16 12:35:50,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:50,834 INFO L495 AbstractCegarLoop]: Abstraction has 1664 states and 1725 transitions. [2022-11-16 12:35:50,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 6.197183098591549) internal successors, (440), 71 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:50,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 1725 transitions. [2022-11-16 12:35:50,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1394 [2022-11-16 12:35:50,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:50,850 INFO L195 NwaCegarLoop]: trace histogram [249, 249, 248, 248, 248, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-11-16 12:35:50,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:51,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:35:51,061 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:35:51,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:51,061 INFO L85 PathProgramCache]: Analyzing trace with hash -524826813, now seen corresponding path program 15 times [2022-11-16 12:35:51,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:35:51,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130540814] [2022-11-16 12:35:51,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:35:51,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:35:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:35:56,056 INFO L134 CoverageAnalysis]: Checked inductivity of 160604 backedges. 74167 proven. 1595 refuted. 0 times theorem prover too weak. 84842 trivial. 0 not checked. [2022-11-16 12:35:56,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:35:56,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130540814] [2022-11-16 12:35:56,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130540814] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:35:56,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643369498] [2022-11-16 12:35:56,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:35:56,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:35:56,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:35:56,058 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:35:56,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-16 12:35:57,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-11-16 12:35:57,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:35:57,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 1467 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 12:35:57,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:57,088 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:35:57,088 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:36:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 160604 backedges. 0 proven. 27242 refuted. 0 times theorem prover too weak. 133362 trivial. 0 not checked. [2022-11-16 12:36:03,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 160604 backedges. 0 proven. 27242 refuted. 0 times theorem prover too weak. 133362 trivial. 0 not checked. [2022-11-16 12:36:15,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643369498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:36:15,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:36:15,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 26, 26] total 84 [2022-11-16 12:36:15,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386507575] [2022-11-16 12:36:15,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:36:15,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-16 12:36:15,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:36:15,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-16 12:36:15,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1312, Invalid=5660, Unknown=0, NotChecked=0, Total=6972 [2022-11-16 12:36:15,385 INFO L87 Difference]: Start difference. First operand 1664 states and 1725 transitions. Second operand has 84 states, 84 states have (on average 5.119047619047619) internal successors, (430), 84 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:36:25,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:36:25,256 INFO L93 Difference]: Finished difference Result 2063 states and 2130 transitions. [2022-11-16 12:36:25,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-11-16 12:36:25,257 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 5.119047619047619) internal successors, (430), 84 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1393 [2022-11-16 12:36:25,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:36:25,264 INFO L225 Difference]: With dead ends: 2063 [2022-11-16 12:36:25,264 INFO L226 Difference]: Without dead ends: 2063 [2022-11-16 12:36:25,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2932 GetRequests, 2737 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10655 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=7662, Invalid=30950, Unknown=0, NotChecked=0, Total=38612 [2022-11-16 12:36:25,267 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2610 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2610 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 2581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:36:25,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2610 Valid, 407 Invalid, 2581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 2311 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-16 12:36:25,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2022-11-16 12:36:25,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1783. [2022-11-16 12:36:25,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 1.0336700336700337) internal successors, (1842), 1782 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:36:25,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 1842 transitions. [2022-11-16 12:36:25,299 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 1842 transitions. Word has length 1393 [2022-11-16 12:36:25,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:36:25,300 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 1842 transitions. [2022-11-16 12:36:25,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 5.119047619047619) internal successors, (430), 84 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:36:25,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 1842 transitions. [2022-11-16 12:36:25,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1479 [2022-11-16 12:36:25,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:36:25,322 INFO L195 NwaCegarLoop]: trace histogram [266, 266, 265, 265, 265, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-11-16 12:36:25,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-16 12:36:25,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-16 12:36:25,531 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:36:25,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:36:25,532 INFO L85 PathProgramCache]: Analyzing trace with hash -950517878, now seen corresponding path program 16 times [2022-11-16 12:36:25,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:36:25,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351362932] [2022-11-16 12:36:25,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:36:25,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:36:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:36:32,625 INFO L134 CoverageAnalysis]: Checked inductivity of 182772 backedges. 89052 proven. 1823 refuted. 0 times theorem prover too weak. 91897 trivial. 0 not checked. [2022-11-16 12:36:32,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:36:32,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351362932] [2022-11-16 12:36:32,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351362932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:36:32,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162661031] [2022-11-16 12:36:32,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:36:32,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:36:32,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:36:32,627 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:36:32,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-16 12:36:51,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:36:51,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:36:51,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 4458 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-16 12:36:51,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 182772 backedges. 153634 proven. 15588 refuted. 0 times theorem prover too weak. 13550 trivial. 0 not checked. [2022-11-16 12:36:54,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 182772 backedges. 153634 proven. 15588 refuted. 0 times theorem prover too weak. 13550 trivial. 0 not checked. [2022-11-16 12:36:57,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162661031] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:36:57,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:36:57,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 38, 38] total 91 [2022-11-16 12:36:57,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727690618] [2022-11-16 12:36:57,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:36:57,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-16 12:36:57,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:36:57,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-16 12:36:57,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1308, Invalid=6882, Unknown=0, NotChecked=0, Total=8190 [2022-11-16 12:36:57,813 INFO L87 Difference]: Start difference. First operand 1783 states and 1842 transitions. Second operand has 91 states, 91 states have (on average 6.868131868131868) internal successors, (625), 91 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:20,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:37:20,817 INFO L93 Difference]: Finished difference Result 2385 states and 2423 transitions. [2022-11-16 12:37:20,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2022-11-16 12:37:20,818 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 6.868131868131868) internal successors, (625), 91 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1478 [2022-11-16 12:37:20,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:37:20,822 INFO L225 Difference]: With dead ends: 2385 [2022-11-16 12:37:20,823 INFO L226 Difference]: Without dead ends: 2385 [2022-11-16 12:37:20,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3234 GetRequests, 2887 SyntacticMatches, 15 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29686 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=20878, Invalid=90344, Unknown=0, NotChecked=0, Total=111222 [2022-11-16 12:37:20,831 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 297 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 13289 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 13332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 13289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:37:20,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 360 Invalid, 13332 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [43 Valid, 13289 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-11-16 12:37:20,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2022-11-16 12:37:20,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 2375. [2022-11-16 12:37:20,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2375 states, 2374 states have (on average 1.0164279696714407) internal successors, (2413), 2374 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:20,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2375 states to 2375 states and 2413 transitions. [2022-11-16 12:37:20,867 INFO L78 Accepts]: Start accepts. Automaton has 2375 states and 2413 transitions. Word has length 1478 [2022-11-16 12:37:20,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:37:20,868 INFO L495 AbstractCegarLoop]: Abstraction has 2375 states and 2413 transitions. [2022-11-16 12:37:20,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 6.868131868131868) internal successors, (625), 91 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:20,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2375 states and 2413 transitions. [2022-11-16 12:37:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1554 [2022-11-16 12:37:20,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:37:20,948 INFO L195 NwaCegarLoop]: trace histogram [281, 281, 280, 280, 280, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-11-16 12:37:20,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-16 12:37:21,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-16 12:37:21,168 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:37:21,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:37:21,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2011725613, now seen corresponding path program 17 times [2022-11-16 12:37:21,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:37:21,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974805320] [2022-11-16 12:37:21,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:37:21,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:37:21,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:37:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 203532 backedges. 111350 proven. 2324 refuted. 0 times theorem prover too weak. 89858 trivial. 0 not checked. [2022-11-16 12:37:29,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:37:29,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974805320] [2022-11-16 12:37:29,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974805320] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:37:29,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902199753] [2022-11-16 12:37:29,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:37:29,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:37:29,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:37:29,774 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:37:29,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-16 12:37:35,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2022-11-16 12:37:35,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:37:35,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 4002 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-16 12:37:35,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:37:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 203532 backedges. 151603 proven. 16208 refuted. 0 times theorem prover too weak. 35721 trivial. 0 not checked. [2022-11-16 12:37:38,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:37:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 203532 backedges. 154575 proven. 13236 refuted. 0 times theorem prover too weak. 35721 trivial. 0 not checked. [2022-11-16 12:37:41,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902199753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:37:41,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:37:41,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 100 [2022-11-16 12:37:41,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072448986] [2022-11-16 12:37:41,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:37:41,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-11-16 12:37:41,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:37:41,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-11-16 12:37:41,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1619, Invalid=8281, Unknown=0, NotChecked=0, Total=9900 [2022-11-16 12:37:41,671 INFO L87 Difference]: Start difference. First operand 2375 states and 2413 transitions. Second operand has 100 states, 100 states have (on average 5.73) internal successors, (573), 100 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:59,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:37:59,416 INFO L93 Difference]: Finished difference Result 2564 states and 2596 transitions. [2022-11-16 12:37:59,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-11-16 12:37:59,417 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 5.73) internal successors, (573), 100 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1553 [2022-11-16 12:37:59,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:37:59,422 INFO L225 Difference]: With dead ends: 2564 [2022-11-16 12:37:59,422 INFO L226 Difference]: Without dead ends: 2564 [2022-11-16 12:37:59,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3337 GetRequests, 3033 SyntacticMatches, 14 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22551 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=15727, Invalid=69245, Unknown=0, NotChecked=0, Total=84972 [2022-11-16 12:37:59,427 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 337 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 11164 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 11220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 11164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:37:59,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 375 Invalid, 11220 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [56 Valid, 11164 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-11-16 12:37:59,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2022-11-16 12:37:59,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 2554. [2022-11-16 12:37:59,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2554 states, 2553 states have (on average 1.0129259694477086) internal successors, (2586), 2553 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:59,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 2586 transitions. [2022-11-16 12:37:59,465 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 2586 transitions. Word has length 1553 [2022-11-16 12:37:59,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:37:59,466 INFO L495 AbstractCegarLoop]: Abstraction has 2554 states and 2586 transitions. [2022-11-16 12:37:59,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 5.73) internal successors, (573), 100 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:59,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 2586 transitions. [2022-11-16 12:37:59,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1569 [2022-11-16 12:37:59,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:37:59,492 INFO L195 NwaCegarLoop]: trace histogram [284, 284, 283, 283, 283, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-11-16 12:37:59,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-16 12:37:59,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-16 12:37:59,707 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:37:59,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:37:59,708 INFO L85 PathProgramCache]: Analyzing trace with hash -595969838, now seen corresponding path program 18 times [2022-11-16 12:37:59,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:37:59,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399443034] [2022-11-16 12:37:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:37:59,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:38:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:38:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 207819 backedges. 114502 proven. 2597 refuted. 0 times theorem prover too weak. 90720 trivial. 0 not checked. [2022-11-16 12:38:08,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:38:08,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399443034] [2022-11-16 12:38:08,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399443034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:38:08,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210977533] [2022-11-16 12:38:08,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:38:08,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:38:08,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:38:08,451 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:38:08,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-16 12:38:14,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2022-11-16 12:38:14,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:38:14,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 3359 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-16 12:38:14,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:38:14,211 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:38:14,212 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:38:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 207819 backedges. 28088 proven. 43074 refuted. 0 times theorem prover too weak. 136657 trivial. 0 not checked. [2022-11-16 12:38:23,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:38:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 207819 backedges. 0 proven. 71162 refuted. 0 times theorem prover too weak. 136657 trivial. 0 not checked. [2022-11-16 12:38:36,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210977533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:38:36,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:38:36,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 32, 32] total 104 [2022-11-16 12:38:36,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223839660] [2022-11-16 12:38:36,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:38:36,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-11-16 12:38:36,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:38:36,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-11-16 12:38:36,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1922, Invalid=8790, Unknown=0, NotChecked=0, Total=10712 [2022-11-16 12:38:36,715 INFO L87 Difference]: Start difference. First operand 2554 states and 2586 transitions. Second operand has 104 states, 104 states have (on average 4.9423076923076925) internal successors, (514), 104 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:00,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:39:00,005 INFO L93 Difference]: Finished difference Result 3232 states and 3297 transitions. [2022-11-16 12:39:00,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 245 states. [2022-11-16 12:39:00,006 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 4.9423076923076925) internal successors, (514), 104 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1568 [2022-11-16 12:39:00,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:39:00,014 INFO L225 Difference]: With dead ends: 3232 [2022-11-16 12:39:00,015 INFO L226 Difference]: Without dead ends: 3232 [2022-11-16 12:39:00,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3419 GetRequests, 3075 SyntacticMatches, 0 SemanticMatches, 344 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37459 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=19916, Invalid=99454, Unknown=0, NotChecked=0, Total=119370 [2022-11-16 12:39:00,024 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 6038 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 3853 mSolverCounterSat, 845 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6038 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 4698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 845 IncrementalHoareTripleChecker+Valid, 3853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:39:00,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6038 Valid, 490 Invalid, 4698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [845 Valid, 3853 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-16 12:39:00,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2022-11-16 12:39:00,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 2955. [2022-11-16 12:39:00,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2954 states have (on average 1.0159106296547056) internal successors, (3001), 2954 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:00,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 3001 transitions. [2022-11-16 12:39:00,060 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 3001 transitions. Word has length 1568 [2022-11-16 12:39:00,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:39:00,061 INFO L495 AbstractCegarLoop]: Abstraction has 2955 states and 3001 transitions. [2022-11-16 12:39:00,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 4.9423076923076925) internal successors, (514), 104 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:00,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 3001 transitions. [2022-11-16 12:39:00,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1883 [2022-11-16 12:39:00,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:39:00,090 INFO L195 NwaCegarLoop]: trace histogram [344, 344, 343, 343, 343, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1] [2022-11-16 12:39:00,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-11-16 12:39:00,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:39:00,304 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:39:00,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:39:00,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1136406914, now seen corresponding path program 19 times [2022-11-16 12:39:00,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:39:00,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846309540] [2022-11-16 12:39:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:39:00,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:39:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:39:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 304000 backedges. 231234 proven. 20637 refuted. 0 times theorem prover too weak. 52129 trivial. 0 not checked. [2022-11-16 12:39:08,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:39:08,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846309540] [2022-11-16 12:39:08,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846309540] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:39:08,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778448331] [2022-11-16 12:39:08,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:39:08,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:39:08,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:39:08,872 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:39:08,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-16 12:39:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:39:10,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 5616 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-16 12:39:10,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:39:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 304000 backedges. 232493 proven. 19378 refuted. 0 times theorem prover too weak. 52129 trivial. 0 not checked. [2022-11-16 12:39:12,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:39:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 304000 backedges. 232493 proven. 19378 refuted. 0 times theorem prover too weak. 52129 trivial. 0 not checked. [2022-11-16 12:39:14,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778448331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:39:14,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:39:14,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 82 [2022-11-16 12:39:14,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742513358] [2022-11-16 12:39:14,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:39:14,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-16 12:39:14,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:39:14,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-16 12:39:14,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1362, Invalid=5280, Unknown=0, NotChecked=0, Total=6642 [2022-11-16 12:39:14,839 INFO L87 Difference]: Start difference. First operand 2955 states and 3001 transitions. Second operand has 82 states, 82 states have (on average 6.524390243902439) internal successors, (535), 82 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:24,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:39:24,755 INFO L93 Difference]: Finished difference Result 2955 states and 3000 transitions. [2022-11-16 12:39:24,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2022-11-16 12:39:24,756 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 6.524390243902439) internal successors, (535), 82 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1882 [2022-11-16 12:39:24,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:39:24,761 INFO L225 Difference]: With dead ends: 2955 [2022-11-16 12:39:24,761 INFO L226 Difference]: Without dead ends: 2955 [2022-11-16 12:39:24,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4020 GetRequests, 3704 SyntacticMatches, 19 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27443 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=23982, Invalid=65120, Unknown=0, NotChecked=0, Total=89102 [2022-11-16 12:39:24,769 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 220 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 2849 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 2890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:39:24,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 445 Invalid, 2890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2849 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-16 12:39:24,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2022-11-16 12:39:24,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2955. [2022-11-16 12:39:24,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2954 states have (on average 1.015572105619499) internal successors, (3000), 2954 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:24,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 3000 transitions. [2022-11-16 12:39:24,794 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 3000 transitions. Word has length 1882 [2022-11-16 12:39:24,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:39:24,795 INFO L495 AbstractCegarLoop]: Abstraction has 2955 states and 3000 transitions. [2022-11-16 12:39:24,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 6.524390243902439) internal successors, (535), 82 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:24,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 3000 transitions. [2022-11-16 12:39:24,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1888 [2022-11-16 12:39:24,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:39:24,823 INFO L195 NwaCegarLoop]: trace histogram [345, 345, 344, 344, 344, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1] [2022-11-16 12:39:24,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-16 12:39:25,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:39:25,036 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:39:25,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:39:25,036 INFO L85 PathProgramCache]: Analyzing trace with hash -87602005, now seen corresponding path program 20 times [2022-11-16 12:39:25,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:39:25,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823040912] [2022-11-16 12:39:25,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:39:25,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:39:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:39:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 305741 backedges. 119020 proven. 158286 refuted. 0 times theorem prover too weak. 28435 trivial. 0 not checked. [2022-11-16 12:39:34,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:39:34,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823040912] [2022-11-16 12:39:34,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823040912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:39:34,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540148697] [2022-11-16 12:39:34,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:39:34,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:39:34,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:39:34,789 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:39:34,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-16 12:39:36,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:39:36,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:39:36,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 5630 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-16 12:39:36,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:39:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 305741 backedges. 120715 proven. 155685 refuted. 0 times theorem prover too weak. 29341 trivial. 0 not checked. [2022-11-16 12:39:38,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:39:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 305741 backedges. 120715 proven. 155685 refuted. 0 times theorem prover too weak. 29341 trivial. 0 not checked. [2022-11-16 12:39:41,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540148697] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:39:41,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:39:41,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 94 [2022-11-16 12:39:41,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014659641] [2022-11-16 12:39:41,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:39:41,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-16 12:39:41,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:39:41,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-16 12:39:41,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1728, Invalid=7014, Unknown=0, NotChecked=0, Total=8742 [2022-11-16 12:39:41,900 INFO L87 Difference]: Start difference. First operand 2955 states and 3000 transitions. Second operand has 94 states, 94 states have (on average 6.468085106382978) internal successors, (608), 94 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:54,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:39:54,780 INFO L93 Difference]: Finished difference Result 2017 states and 2052 transitions. [2022-11-16 12:39:54,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 300 states. [2022-11-16 12:39:54,781 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 6.468085106382978) internal successors, (608), 94 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1887 [2022-11-16 12:39:54,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:39:54,785 INFO L225 Difference]: With dead ends: 2017 [2022-11-16 12:39:54,785 INFO L226 Difference]: Without dead ends: 2017 [2022-11-16 12:39:54,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4115 GetRequests, 3707 SyntacticMatches, 21 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62285 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=31328, Invalid=119604, Unknown=0, NotChecked=0, Total=150932 [2022-11-16 12:39:54,795 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 1755 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 4546 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1755 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 4708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 4546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:39:54,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1755 Valid, 274 Invalid, 4708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 4546 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-16 12:39:54,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2022-11-16 12:39:54,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 2005. [2022-11-16 12:39:54,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 1.0179640718562875) internal successors, (2040), 2004 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:54,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 2040 transitions. [2022-11-16 12:39:54,809 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 2040 transitions. Word has length 1887 [2022-11-16 12:39:54,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:39:54,811 INFO L495 AbstractCegarLoop]: Abstraction has 2005 states and 2040 transitions. [2022-11-16 12:39:54,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 6.468085106382978) internal successors, (608), 94 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:54,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 2040 transitions. [2022-11-16 12:39:54,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2000 [2022-11-16 12:39:54,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:39:54,840 INFO L195 NwaCegarLoop]: trace histogram [366, 366, 365, 365, 365, 25, 24, 24, 24, 24, 24, 24, 1, 1, 1] [2022-11-16 12:39:54,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-11-16 12:39:55,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:39:55,053 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:39:55,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:39:55,053 INFO L85 PathProgramCache]: Analyzing trace with hash 829353423, now seen corresponding path program 21 times [2022-11-16 12:39:55,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:39:55,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9274635] [2022-11-16 12:39:55,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:39:55,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:39:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 343985 backedges. 275712 proven. 27412 refuted. 0 times theorem prover too weak. 40861 trivial. 0 not checked. [2022-11-16 12:40:05,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:05,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9274635] [2022-11-16 12:40:05,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9274635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:05,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816385967] [2022-11-16 12:40:05,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:40:05,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:05,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:05,120 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:05,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-16 12:40:16,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2022-11-16 12:40:16,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:40:16,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 3078 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-16 12:40:16,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:20,207 INFO L134 CoverageAnalysis]: Checked inductivity of 343985 backedges. 162807 proven. 37872 refuted. 0 times theorem prover too weak. 143306 trivial. 0 not checked. [2022-11-16 12:40:20,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:24,727 INFO L134 CoverageAnalysis]: Checked inductivity of 343985 backedges. 161890 proven. 38789 refuted. 0 times theorem prover too weak. 143306 trivial. 0 not checked. [2022-11-16 12:40:24,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816385967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:24,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:40:24,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 56, 56] total 147 [2022-11-16 12:40:24,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620186503] [2022-11-16 12:40:24,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:24,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-11-16 12:40:24,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:24,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-11-16 12:40:24,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2808, Invalid=18654, Unknown=0, NotChecked=0, Total=21462 [2022-11-16 12:40:24,734 INFO L87 Difference]: Start difference. First operand 2005 states and 2040 transitions. Second operand has 147 states, 147 states have (on average 6.0272108843537415) internal successors, (886), 147 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:56,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:56,829 INFO L93 Difference]: Finished difference Result 2428 states and 2464 transitions. [2022-11-16 12:40:56,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 430 states. [2022-11-16 12:40:56,829 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 6.0272108843537415) internal successors, (886), 147 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1999 [2022-11-16 12:40:56,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:56,837 INFO L225 Difference]: With dead ends: 2428 [2022-11-16 12:40:56,837 INFO L226 Difference]: Without dead ends: 2428 [2022-11-16 12:40:56,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4467 GetRequests, 3891 SyntacticMatches, 6 SemanticMatches, 570 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107614 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=41332, Invalid=285280, Unknown=0, NotChecked=0, Total=326612 [2022-11-16 12:40:56,857 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 4343 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 20721 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4343 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 21210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 20721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:56,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4343 Valid, 765 Invalid, 21210 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [489 Valid, 20721 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-11-16 12:40:56,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2022-11-16 12:40:56,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2386. [2022-11-16 12:40:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2386 states, 2385 states have (on average 1.0155136268343816) internal successors, (2422), 2385 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:56,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2386 states to 2386 states and 2422 transitions. [2022-11-16 12:40:56,881 INFO L78 Accepts]: Start accepts. Automaton has 2386 states and 2422 transitions. Word has length 1999 [2022-11-16 12:40:56,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:56,883 INFO L495 AbstractCegarLoop]: Abstraction has 2386 states and 2422 transitions. [2022-11-16 12:40:56,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 6.0272108843537415) internal successors, (886), 147 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:56,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2386 states and 2422 transitions. [2022-11-16 12:40:56,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2239 [2022-11-16 12:40:56,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:56,919 INFO L195 NwaCegarLoop]: trace histogram [411, 411, 410, 410, 410, 27, 26, 26, 26, 26, 26, 26, 1, 1, 1] [2022-11-16 12:40:56,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-16 12:40:57,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:57,135 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:40:57,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:57,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1177943594, now seen corresponding path program 22 times [2022-11-16 12:40:57,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:57,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433007316] [2022-11-16 12:40:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:57,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:10,810 INFO L134 CoverageAnalysis]: Checked inductivity of 433442 backedges. 231759 proven. 3839 refuted. 0 times theorem prover too weak. 197844 trivial. 0 not checked. [2022-11-16 12:41:10,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:10,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433007316] [2022-11-16 12:41:10,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433007316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:10,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110618129] [2022-11-16 12:41:10,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:41:10,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:10,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:10,812 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:10,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-16 12:41:37,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:41:37,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:41:37,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 6653 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-16 12:41:37,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 433442 backedges. 3332 proven. 413087 refuted. 0 times theorem prover too weak. 17023 trivial. 0 not checked. [2022-11-16 12:41:43,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 433442 backedges. 3332 proven. 413087 refuted. 0 times theorem prover too weak. 17023 trivial. 0 not checked. [2022-11-16 12:41:49,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110618129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:49,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:41:49,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 62, 62] total 147 [2022-11-16 12:41:49,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339528375] [2022-11-16 12:41:49,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:49,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-11-16 12:41:49,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:49,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-11-16 12:41:49,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2964, Invalid=18498, Unknown=0, NotChecked=0, Total=21462 [2022-11-16 12:41:49,652 INFO L87 Difference]: Start difference. First operand 2386 states and 2422 transitions. Second operand has 147 states, 147 states have (on average 6.408163265306122) internal successors, (942), 147 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:49,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:49,653 INFO L93 Difference]: Finished difference Result 5563 states and 5715 transitions. [2022-11-16 12:42:49,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 944 states. [2022-11-16 12:42:49,654 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 6.408163265306122) internal successors, (942), 147 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2238 [2022-11-16 12:42:49,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:49,685 INFO L225 Difference]: With dead ends: 5563 [2022-11-16 12:42:49,685 INFO L226 Difference]: Without dead ends: 5563 [2022-11-16 12:42:49,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5465 GetRequests, 4357 SyntacticMatches, 23 SemanticMatches, 1085 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507224 ImplicationChecksByTransitivity, 57.1s TimeCoverageRelationStatistics Valid=100338, Invalid=1080144, Unknown=0, NotChecked=0, Total=1180482 [2022-11-16 12:42:49,727 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 7403 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 12157 mSolverCounterSat, 756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7403 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 12913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 12157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:49,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7403 Valid, 846 Invalid, 12913 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [756 Valid, 12157 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-11-16 12:42:49,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5563 states. [2022-11-16 12:42:49,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5563 to 3946. [2022-11-16 12:42:49,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3946 states, 3945 states have (on average 1.0248415716096324) internal successors, (4043), 3945 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 4043 transitions. [2022-11-16 12:42:49,760 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 4043 transitions. Word has length 2238 [2022-11-16 12:42:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:49,762 INFO L495 AbstractCegarLoop]: Abstraction has 3946 states and 4043 transitions. [2022-11-16 12:42:49,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 6.408163265306122) internal successors, (942), 147 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:49,762 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 4043 transitions. [2022-11-16 12:42:49,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2859 [2022-11-16 12:42:49,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:49,859 INFO L195 NwaCegarLoop]: trace histogram [528, 528, 527, 527, 527, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1] [2022-11-16 12:42:49,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-16 12:42:50,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:50,075 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:42:50,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:50,076 INFO L85 PathProgramCache]: Analyzing trace with hash -187793902, now seen corresponding path program 23 times [2022-11-16 12:42:50,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:50,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971774864] [2022-11-16 12:42:50,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:50,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 714240 backedges. 329474 proven. 4187 refuted. 0 times theorem prover too weak. 380579 trivial. 0 not checked. [2022-11-16 12:43:10,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:10,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971774864] [2022-11-16 12:43:10,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971774864] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:43:10,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884697434] [2022-11-16 12:43:10,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:43:10,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:43:10,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:43:10,656 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:43:10,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-16 12:43:41,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 77 check-sat command(s) [2022-11-16 12:43:41,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:43:41,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 5511 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-16 12:43:41,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:43:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 714240 backedges. 531428 proven. 38754 refuted. 0 times theorem prover too weak. 144058 trivial. 0 not checked. [2022-11-16 12:43:45,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:43:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 714240 backedges. 538177 proven. 32005 refuted. 0 times theorem prover too weak. 144058 trivial. 0 not checked. [2022-11-16 12:43:49,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884697434] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:43:49,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:43:49,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 131 [2022-11-16 12:43:49,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627886586] [2022-11-16 12:43:49,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:43:49,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-11-16 12:43:49,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:49,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-11-16 12:43:49,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2704, Invalid=14326, Unknown=0, NotChecked=0, Total=17030 [2022-11-16 12:43:49,950 INFO L87 Difference]: Start difference. First operand 3946 states and 4043 transitions. Second operand has 131 states, 131 states have (on average 5.824427480916031) internal successors, (763), 131 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:23,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:23,481 INFO L93 Difference]: Finished difference Result 3946 states and 4027 transitions. [2022-11-16 12:44:23,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 338 states. [2022-11-16 12:44:23,482 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 5.824427480916031) internal successors, (763), 131 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2858 [2022-11-16 12:44:23,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:23,489 INFO L225 Difference]: With dead ends: 3946 [2022-11-16 12:44:23,489 INFO L226 Difference]: Without dead ends: 3946 [2022-11-16 12:44:23,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6095 GetRequests, 5619 SyntacticMatches, 19 SemanticMatches, 457 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57041 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=37792, Invalid=172430, Unknown=0, NotChecked=0, Total=210222 [2022-11-16 12:44:23,499 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 443 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 23582 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 23626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 23582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:23,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 723 Invalid, 23626 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [44 Valid, 23582 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2022-11-16 12:44:23,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3946 states. [2022-11-16 12:44:23,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3946 to 3946. [2022-11-16 12:44:23,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3946 states, 3945 states have (on average 1.020785804816223) internal successors, (4027), 3945 states have internal predecessors, (4027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 4027 transitions. [2022-11-16 12:44:23,525 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 4027 transitions. Word has length 2858 [2022-11-16 12:44:23,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:23,526 INFO L495 AbstractCegarLoop]: Abstraction has 3946 states and 4027 transitions. [2022-11-16 12:44:23,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 5.824427480916031) internal successors, (763), 131 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:23,527 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 4027 transitions. [2022-11-16 12:44:23,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2889 [2022-11-16 12:44:23,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:23,578 INFO L195 NwaCegarLoop]: trace histogram [534, 534, 533, 533, 533, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1] [2022-11-16 12:44:23,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-16 12:44:23,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-16 12:44:23,778 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:44:23,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:23,779 INFO L85 PathProgramCache]: Analyzing trace with hash 180639642, now seen corresponding path program 24 times [2022-11-16 12:44:23,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:23,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468755121] [2022-11-16 12:44:23,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:23,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 730329 backedges. 305345 proven. 10892 refuted. 0 times theorem prover too weak. 414092 trivial. 0 not checked. [2022-11-16 12:44:46,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:46,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468755121] [2022-11-16 12:44:46,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468755121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:46,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275257595] [2022-11-16 12:44:46,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:44:46,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:46,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:46,805 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:46,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-16 12:45:37,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 77 check-sat command(s) [2022-11-16 12:45:37,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:45:37,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 5401 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-16 12:45:37,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:41,852 INFO L134 CoverageAnalysis]: Checked inductivity of 730329 backedges. 205508 proven. 14832 refuted. 0 times theorem prover too weak. 509989 trivial. 0 not checked. [2022-11-16 12:45:41,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:45:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 730329 backedges. 205508 proven. 14832 refuted. 0 times theorem prover too weak. 509989 trivial. 0 not checked. [2022-11-16 12:45:47,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275257595] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:45:47,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:45:47,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 64, 64] total 180 [2022-11-16 12:45:47,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127887521] [2022-11-16 12:45:47,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:45:47,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 180 states [2022-11-16 12:45:47,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:45:47,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2022-11-16 12:45:47,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4375, Invalid=27845, Unknown=0, NotChecked=0, Total=32220 [2022-11-16 12:45:47,864 INFO L87 Difference]: Start difference. First operand 3946 states and 4027 transitions. Second operand has 180 states, 180 states have (on average 5.027777777777778) internal successors, (905), 180 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:12,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:12,818 INFO L93 Difference]: Finished difference Result 3693 states and 3744 transitions. [2022-11-16 12:46:12,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 334 states. [2022-11-16 12:46:12,819 INFO L78 Accepts]: Start accepts. Automaton has has 180 states, 180 states have (on average 5.027777777777778) internal successors, (905), 180 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2888 [2022-11-16 12:46:12,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:12,825 INFO L225 Difference]: With dead ends: 3693 [2022-11-16 12:46:12,825 INFO L226 Difference]: Without dead ends: 3693 [2022-11-16 12:46:12,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6161 GetRequests, 5653 SyntacticMatches, 0 SemanticMatches, 508 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79993 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=35218, Invalid=224372, Unknown=0, NotChecked=0, Total=259590 [2022-11-16 12:46:12,836 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 7565 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 11862 mSolverCounterSat, 794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7565 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 12656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 794 IncrementalHoareTripleChecker+Valid, 11862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:12,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7565 Valid, 1070 Invalid, 12656 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [794 Valid, 11862 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-16 12:46:12,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3693 states. [2022-11-16 12:46:12,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3693 to 3186. [2022-11-16 12:46:12,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3185 states have (on average 1.011302982731554) internal successors, (3221), 3185 states have internal predecessors, (3221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:12,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 3221 transitions. [2022-11-16 12:46:12,856 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 3221 transitions. Word has length 2888 [2022-11-16 12:46:12,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:12,857 INFO L495 AbstractCegarLoop]: Abstraction has 3186 states and 3221 transitions. [2022-11-16 12:46:12,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 180 states, 180 states have (on average 5.027777777777778) internal successors, (905), 180 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:12,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 3221 transitions. [2022-11-16 12:46:12,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2969 [2022-11-16 12:46:12,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:12,903 INFO L195 NwaCegarLoop]: trace histogram [550, 550, 549, 549, 549, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1] [2022-11-16 12:46:12,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-11-16 12:46:13,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-16 12:46:13,104 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:46:13,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:13,104 INFO L85 PathProgramCache]: Analyzing trace with hash -213931310, now seen corresponding path program 25 times [2022-11-16 12:46:13,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:46:13,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262913975] [2022-11-16 12:46:13,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:13,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:46:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 774113 backedges. 329628 proven. 5321 refuted. 0 times theorem prover too weak. 439164 trivial. 0 not checked. [2022-11-16 12:46:37,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:46:37,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262913975] [2022-11-16 12:46:37,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262913975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:46:37,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5906641] [2022-11-16 12:46:37,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:46:37,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:46:37,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:46:37,210 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:46:37,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0a1617-5829-482f-8ffb-22b3a9b0c5cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-16 12:46:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:39,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 8764 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-16 12:46:39,515 INFO L286 TraceCheckSpWp]: Computing forward predicates...