./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e6c0909fc593366247feb227b85c6733aa1dfc9c572e69f3a5aa951fa82d0326 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:40:52,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:40:52,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:40:52,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:40:52,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:40:52,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:40:52,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:40:52,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:40:52,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:40:52,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:40:52,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:40:52,859 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:40:52,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:40:52,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:40:52,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:40:52,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:40:52,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:40:52,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:40:52,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:40:52,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:40:52,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:40:52,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:40:52,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:40:52,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:40:52,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:40:52,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:40:52,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:40:52,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:40:52,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:40:52,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:40:52,878 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:40:52,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:40:52,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:40:52,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:40:52,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:40:52,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:40:52,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:40:52,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:40:52,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:40:52,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:40:52,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:40:52,883 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 22:40:52,900 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:40:52,900 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:40:52,900 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:40:52,901 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:40:52,901 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:40:52,901 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:40:52,902 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:40:52,902 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:40:52,902 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:40:52,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:40:52,902 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:40:52,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:40:52,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:40:52,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:40:52,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:40:52,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:40:52,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:40:52,903 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:40:52,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:40:52,903 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:40:52,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:40:52,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:40:52,903 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:40:52,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:40:52,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:40:52,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:40:52,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:40:52,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:40:52,904 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:40:52,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:40:52,904 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:40:52,904 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:40:52,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:40:52,905 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:40:52,905 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_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6c0909fc593366247feb227b85c6733aa1dfc9c572e69f3a5aa951fa82d0326 [2021-12-06 22:40:53,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:40:53,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:40:53,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:40:53,091 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:40:53,092 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:40:53,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-crafted/zero_sum_const5.c [2021-12-06 22:40:53,142 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/data/acd71ca90/100e235fda2c4f41b3915ce1a75450c1/FLAGefc223ba7 [2021-12-06 22:40:53,495 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:40:53,496 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/sv-benchmarks/c/array-crafted/zero_sum_const5.c [2021-12-06 22:40:53,502 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/data/acd71ca90/100e235fda2c4f41b3915ce1a75450c1/FLAGefc223ba7 [2021-12-06 22:40:53,514 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/data/acd71ca90/100e235fda2c4f41b3915ce1a75450c1 [2021-12-06 22:40:53,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:40:53,517 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:40:53,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:40:53,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:40:53,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:40:53,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:40:53" (1/1) ... [2021-12-06 22:40:53,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23ec6be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:40:53, skipping insertion in model container [2021-12-06 22:40:53,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:40:53" (1/1) ... [2021-12-06 22:40:53,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:40:53,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:40:53,660 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/sv-benchmarks/c/array-crafted/zero_sum_const5.c[406,419] [2021-12-06 22:40:53,679 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:40:53,687 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:40:53,697 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/sv-benchmarks/c/array-crafted/zero_sum_const5.c[406,419] [2021-12-06 22:40:53,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:40:53,719 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:40:53,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:40:53 WrapperNode [2021-12-06 22:40:53,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:40:53,721 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:40:53,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:40:53,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:40:53,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:40:53" (1/1) ... [2021-12-06 22:40:53,736 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:40:53" (1/1) ... [2021-12-06 22:40:53,759 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 148 [2021-12-06 22:40:53,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:40:53,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:40:53,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:40:53,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:40:53,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:40:53" (1/1) ... [2021-12-06 22:40:53,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:40:53" (1/1) ... [2021-12-06 22:40:53,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:40:53" (1/1) ... [2021-12-06 22:40:53,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:40:53" (1/1) ... [2021-12-06 22:40:53,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:40:53" (1/1) ... [2021-12-06 22:40:53,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:40:53" (1/1) ... [2021-12-06 22:40:53,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:40:53" (1/1) ... [2021-12-06 22:40:53,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:40:53,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:40:53,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:40:53,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:40:53,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:40:53" (1/1) ... [2021-12-06 22:40:53,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:40:53,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:40:53,813 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:40:53,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:40:53,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:40:53,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 22:40:53,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 22:40:53,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 22:40:53,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:40:53,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:40:53,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 22:40:53,891 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:40:53,892 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:40:54,015 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:40:54,020 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:40:54,020 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-12-06 22:40:54,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:40:54 BoogieIcfgContainer [2021-12-06 22:40:54,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:40:54,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:40:54,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:40:54,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:40:54,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:40:53" (1/3) ... [2021-12-06 22:40:54,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@279743e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:40:54, skipping insertion in model container [2021-12-06 22:40:54,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:40:53" (2/3) ... [2021-12-06 22:40:54,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@279743e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:40:54, skipping insertion in model container [2021-12-06 22:40:54,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:40:54" (3/3) ... [2021-12-06 22:40:54,027 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const5.c [2021-12-06 22:40:54,031 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:40:54,031 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 22:40:54,066 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:40:54,071 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 22:40:54,071 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 22:40:54,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:54,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 22:40:54,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:40:54,088 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:40:54,088 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:40:54,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:40:54,092 INFO L85 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2021-12-06 22:40:54,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:40:54,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069590103] [2021-12-06 22:40:54,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:40:54,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:40:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:40:54,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:40:54,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069590103] [2021-12-06 22:40:54,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069590103] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:40:54,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:40:54,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:40:54,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947473345] [2021-12-06 22:40:54,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:40:54,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 22:40:54,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:40:54,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 22:40:54,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 22:40:54,235 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:54,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:40:54,249 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2021-12-06 22:40:54,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 22:40:54,251 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-06 22:40:54,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:40:54,259 INFO L225 Difference]: With dead ends: 83 [2021-12-06 22:40:54,259 INFO L226 Difference]: Without dead ends: 39 [2021-12-06 22:40:54,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 22:40:54,266 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:40:54,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:40:54,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-06 22:40:54,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-06 22:40:54,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:54,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2021-12-06 22:40:54,299 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2021-12-06 22:40:54,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:40:54,299 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2021-12-06 22:40:54,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:54,300 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2021-12-06 22:40:54,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 22:40:54,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:40:54,301 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:40:54,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:40:54,302 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:40:54,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:40:54,303 INFO L85 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2021-12-06 22:40:54,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:40:54,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074442146] [2021-12-06 22:40:54,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:40:54,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:40:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:54,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:40:54,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:40:54,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074442146] [2021-12-06 22:40:54,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074442146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:40:54,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:40:54,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:40:54,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541018548] [2021-12-06 22:40:54,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:40:54,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:40:54,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:40:54,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:40:54,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:40:54,366 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:54,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:40:54,433 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2021-12-06 22:40:54,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:40:54,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-06 22:40:54,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:40:54,434 INFO L225 Difference]: With dead ends: 75 [2021-12-06 22:40:54,435 INFO L226 Difference]: Without dead ends: 41 [2021-12-06 22:40:54,435 INFO L932 BasicCegarLoop]: 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 [2021-12-06 22:40:54,436 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:40:54,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:40:54,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-06 22:40:54,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-12-06 22:40:54,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:54,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-12-06 22:40:54,442 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2021-12-06 22:40:54,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:40:54,442 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-12-06 22:40:54,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:54,443 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-12-06 22:40:54,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 22:40:54,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:40:54,443 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:40:54,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 22:40:54,444 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:40:54,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:40:54,444 INFO L85 PathProgramCache]: Analyzing trace with hash 479992254, now seen corresponding path program 1 times [2021-12-06 22:40:54,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:40:54,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236294519] [2021-12-06 22:40:54,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:40:54,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:40:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:40:54,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:40:54,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236294519] [2021-12-06 22:40:54,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236294519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:40:54,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:40:54,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:40:54,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489672760] [2021-12-06 22:40:54,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:40:54,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:40:54,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:40:54,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:40:54,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:40:54,491 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:54,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:40:54,580 INFO L93 Difference]: Finished difference Result 92 states and 120 transitions. [2021-12-06 22:40:54,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:40:54,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-06 22:40:54,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:40:54,581 INFO L225 Difference]: With dead ends: 92 [2021-12-06 22:40:54,582 INFO L226 Difference]: Without dead ends: 61 [2021-12-06 22:40:54,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:40:54,584 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 64 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:40:54,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 19 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:40:54,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-06 22:40:54,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2021-12-06 22:40:54,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:54,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-12-06 22:40:54,593 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 29 [2021-12-06 22:40:54,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:40:54,594 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-12-06 22:40:54,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:54,594 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-12-06 22:40:54,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 22:40:54,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:40:54,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:40:54,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 22:40:54,596 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:40:54,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:40:54,597 INFO L85 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2021-12-06 22:40:54,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:40:54,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119806367] [2021-12-06 22:40:54,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:40:54,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:40:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 22:40:54,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:40:54,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119806367] [2021-12-06 22:40:54,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119806367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:40:54,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633476387] [2021-12-06 22:40:54,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:40:54,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:40:54,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:40:54,677 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:40:54,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:40:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:54,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 22:40:54,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:40:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 22:40:54,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:40:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 22:40:54,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633476387] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:40:54,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:40:54,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-06 22:40:54,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817781376] [2021-12-06 22:40:54,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:40:54,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:40:54,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:40:54,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:40:54,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:40:54,901 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:54,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:40:54,991 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2021-12-06 22:40:54,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:40:54,992 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-06 22:40:54,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:40:54,992 INFO L225 Difference]: With dead ends: 97 [2021-12-06 22:40:54,992 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 22:40:54,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:40:54,994 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:40:54,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 49 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:40:54,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 22:40:54,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-12-06 22:40:54,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:55,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-12-06 22:40:55,000 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2021-12-06 22:40:55,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:40:55,000 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-12-06 22:40:55,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:55,001 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-12-06 22:40:55,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 22:40:55,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:40:55,002 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:40:55,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:40:55,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:40:55,204 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:40:55,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:40:55,206 INFO L85 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2021-12-06 22:40:55,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:40:55,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122514929] [2021-12-06 22:40:55,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:40:55,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:40:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 22:40:55,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:40:55,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122514929] [2021-12-06 22:40:55,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122514929] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:40:55,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294172696] [2021-12-06 22:40:55,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:40:55,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:40:55,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:40:55,376 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:40:55,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:40:55,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:40:55,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:40:55,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 22:40:55,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:40:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 22:40:55,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:40:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 22:40:55,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294172696] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:40:55,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:40:55,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-06 22:40:55,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470256312] [2021-12-06 22:40:55,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:40:55,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 22:40:55,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:40:55,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 22:40:55,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:40:55,560 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:55,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:40:55,652 INFO L93 Difference]: Finished difference Result 123 states and 151 transitions. [2021-12-06 22:40:55,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:40:55,652 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-06 22:40:55,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:40:55,653 INFO L225 Difference]: With dead ends: 123 [2021-12-06 22:40:55,653 INFO L226 Difference]: Without dead ends: 83 [2021-12-06 22:40:55,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:40:55,654 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:40:55,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 22 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:40:55,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-06 22:40:55,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2021-12-06 22:40:55,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:55,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2021-12-06 22:40:55,661 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2021-12-06 22:40:55,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:40:55,661 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2021-12-06 22:40:55,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:40:55,661 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2021-12-06 22:40:55,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 22:40:55,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:40:55,662 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:40:55,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 22:40:55,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:40:55,865 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:40:55,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:40:55,866 INFO L85 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2021-12-06 22:40:55,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:40:55,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42754148] [2021-12-06 22:40:55,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:40:55,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:40:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:40:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:40:57,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:40:57,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42754148] [2021-12-06 22:40:57,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42754148] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:40:57,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770293899] [2021-12-06 22:40:57,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:40:57,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:40:57,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:40:57,207 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:40:57,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 22:40:57,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 22:40:57,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:40:57,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-06 22:40:57,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:40:58,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:40:58,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:40:58,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 9 [2021-12-06 22:40:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:40:59,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:41:06,534 INFO L354 Elim1Store]: treesize reduction 58, result has 72.5 percent of original size [2021-12-06 22:41:06,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 175 [2021-12-06 22:41:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:41:20,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770293899] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:41:20,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:41:20,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29, 33] total 73 [2021-12-06 22:41:20,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782880] [2021-12-06 22:41:20,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:41:20,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-06 22:41:20,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:41:20,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-06 22:41:20,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=4793, Unknown=0, NotChecked=0, Total=5256 [2021-12-06 22:41:20,477 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 73 states, 73 states have (on average 2.7534246575342465) internal successors, (201), 73 states have internal predecessors, (201), 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) [2021-12-06 22:41:25,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:41:25,334 INFO L93 Difference]: Finished difference Result 244 states and 283 transitions. [2021-12-06 22:41:25,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-06 22:41:25,334 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.7534246575342465) internal successors, (201), 73 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-06 22:41:25,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:41:25,337 INFO L225 Difference]: With dead ends: 244 [2021-12-06 22:41:25,337 INFO L226 Difference]: Without dead ends: 240 [2021-12-06 22:41:25,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 103 SyntacticMatches, 45 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 10 DeprecatedPredicates, 5943 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1324, Invalid=14176, Unknown=0, NotChecked=0, Total=15500 [2021-12-06 22:41:25,343 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 103 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 2457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1381 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:41:25,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 140 Invalid, 2457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 942 Invalid, 0 Unknown, 1381 Unchecked, 0.4s Time] [2021-12-06 22:41:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-06 22:41:25,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 125. [2021-12-06 22:41:25,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 124 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:41:25,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2021-12-06 22:41:25,363 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 71 [2021-12-06 22:41:25,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:41:25,363 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2021-12-06 22:41:25,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.7534246575342465) internal successors, (201), 73 states have internal predecessors, (201), 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) [2021-12-06 22:41:25,364 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2021-12-06 22:41:25,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 22:41:25,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:41:25,366 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:41:25,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 22:41:25,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 22:41:25,567 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:41:25,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:41:25,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1767165226, now seen corresponding path program 4 times [2021-12-06 22:41:25,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:41:25,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151064309] [2021-12-06 22:41:25,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:41:25,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:41:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 22:41:25,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:41:25,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151064309] [2021-12-06 22:41:25,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151064309] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:41:25,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308174690] [2021-12-06 22:41:25,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:41:25,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:41:25,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:41:25,637 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:41:25,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 22:41:25,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:41:25,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:41:25,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 22:41:25,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:41:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 22:41:25,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:41:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 22:41:25,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308174690] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:41:25,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:41:25,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-06 22:41:25,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611439524] [2021-12-06 22:41:25,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:41:25,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 22:41:25,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:41:25,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 22:41:25,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:41:25,863 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:41:26,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:41:26,067 INFO L93 Difference]: Finished difference Result 289 states and 334 transitions. [2021-12-06 22:41:26,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 22:41:26,067 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-06 22:41:26,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:41:26,068 INFO L225 Difference]: With dead ends: 289 [2021-12-06 22:41:26,068 INFO L226 Difference]: Without dead ends: 168 [2021-12-06 22:41:26,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:41:26,069 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 227 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:41:26,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 46 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:41:26,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-06 22:41:26,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 140. [2021-12-06 22:41:26,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1366906474820144) internal successors, (158), 139 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:41:26,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 158 transitions. [2021-12-06 22:41:26,080 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 158 transitions. Word has length 73 [2021-12-06 22:41:26,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:41:26,080 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 158 transitions. [2021-12-06 22:41:26,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:41:26,080 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 158 transitions. [2021-12-06 22:41:26,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 22:41:26,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:41:26,082 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:41:26,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 22:41:26,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:41:26,284 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:41:26,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:41:26,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1072452492, now seen corresponding path program 5 times [2021-12-06 22:41:26,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:41:26,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98477836] [2021-12-06 22:41:26,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:41:26,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:41:26,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-06 22:41:26,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:41:26,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98477836] [2021-12-06 22:41:26,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98477836] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:41:26,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879461034] [2021-12-06 22:41:26,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:41:26,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:41:26,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:41:26,383 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:41:26,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 22:41:26,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 22:41:26,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:41:26,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 22:41:26,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:41:26,621 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-06 22:41:26,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:41:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-06 22:41:26,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879461034] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:41:26,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:41:26,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-06 22:41:26,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962747017] [2021-12-06 22:41:26,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:41:26,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 22:41:26,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:41:26,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 22:41:26,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:41:26,691 INFO L87 Difference]: Start difference. First operand 140 states and 158 transitions. Second operand has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:41:26,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:41:26,871 INFO L93 Difference]: Finished difference Result 156 states and 174 transitions. [2021-12-06 22:41:26,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 22:41:26,872 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-06 22:41:26,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:41:26,872 INFO L225 Difference]: With dead ends: 156 [2021-12-06 22:41:26,872 INFO L226 Difference]: Without dead ends: 104 [2021-12-06 22:41:26,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:41:26,873 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 173 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:41:26,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 33 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:41:26,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-06 22:41:26,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2021-12-06 22:41:26,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.118279569892473) internal successors, (104), 93 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:41:26,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2021-12-06 22:41:26,881 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 75 [2021-12-06 22:41:26,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:41:26,881 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2021-12-06 22:41:26,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:41:26,882 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2021-12-06 22:41:26,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 22:41:26,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:41:26,883 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:41:26,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 22:41:27,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:41:27,085 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:41:27,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:41:27,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1413596990, now seen corresponding path program 6 times [2021-12-06 22:41:27,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:41:27,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019585825] [2021-12-06 22:41:27,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:41:27,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:41:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:41:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:41:31,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:41:31,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019585825] [2021-12-06 22:41:31,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019585825] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:41:31,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685806119] [2021-12-06 22:41:31,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:41:31,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:41:31,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:41:31,127 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:41:31,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 22:41:31,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-06 22:41:31,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:41:31,181 WARN L261 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 135 conjunts are in the unsatisfiable core [2021-12-06 22:41:31,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:41:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:41:34,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:41:59,972 INFO L354 Elim1Store]: treesize reduction 185, result has 55.3 percent of original size [2021-12-06 22:41:59,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 152 treesize of output 263 [2021-12-06 22:42:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 4 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:42:06,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685806119] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:42:06,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:42:06,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 42, 39] total 128 [2021-12-06 22:42:06,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885318144] [2021-12-06 22:42:06,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:42:06,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-12-06 22:42:06,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:42:06,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-12-06 22:42:06,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=15477, Unknown=6, NotChecked=0, Total=16256 [2021-12-06 22:42:06,319 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 128 states, 128 states have (on average 2.0625) internal successors, (264), 128 states have internal predecessors, (264), 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) [2021-12-06 22:42:13,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:42:13,087 INFO L93 Difference]: Finished difference Result 206 states and 231 transitions. [2021-12-06 22:42:13,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 22:42:13,088 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0625) internal successors, (264), 128 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-06 22:42:13,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:42:13,089 INFO L225 Difference]: With dead ends: 206 [2021-12-06 22:42:13,089 INFO L226 Difference]: Without dead ends: 202 [2021-12-06 22:42:13,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 121 SyntacticMatches, 30 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 9407 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=1403, Invalid=24997, Unknown=6, NotChecked=0, Total=26406 [2021-12-06 22:42:13,096 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 109 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 4188 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 7119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 4188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2390 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:42:13,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 363 Invalid, 7119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 4188 Invalid, 0 Unknown, 2390 Unchecked, 2.1s Time] [2021-12-06 22:42:13,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-06 22:42:13,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 163. [2021-12-06 22:42:13,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.123456790123457) internal successors, (182), 162 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:42:13,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 182 transitions. [2021-12-06 22:42:13,105 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 182 transitions. Word has length 93 [2021-12-06 22:42:13,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:42:13,105 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 182 transitions. [2021-12-06 22:42:13,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0625) internal successors, (264), 128 states have internal predecessors, (264), 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) [2021-12-06 22:42:13,105 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 182 transitions. [2021-12-06 22:42:13,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 22:42:13,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:42:13,106 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:42:13,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 22:42:13,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 22:42:13,308 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:42:13,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:42:13,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1592040608, now seen corresponding path program 7 times [2021-12-06 22:42:13,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:42:13,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340800479] [2021-12-06 22:42:13,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:42:13,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:42:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 22:42:13,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:42:13,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340800479] [2021-12-06 22:42:13,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340800479] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:42:13,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917463641] [2021-12-06 22:42:13,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:42:13,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:42:13,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:42:13,388 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:42:13,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 22:42:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:13,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 22:42:13,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:42:13,585 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 22:42:13,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:42:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 22:42:13,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917463641] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:42:13,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:42:13,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-06 22:42:13,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089406626] [2021-12-06 22:42:13,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:42:13,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 22:42:13,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:42:13,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 22:42:13,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:42:13,689 INFO L87 Difference]: Start difference. First operand 163 states and 182 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:42:14,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:42:14,007 INFO L93 Difference]: Finished difference Result 365 states and 410 transitions. [2021-12-06 22:42:14,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 22:42:14,008 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-06 22:42:14,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:42:14,009 INFO L225 Difference]: With dead ends: 365 [2021-12-06 22:42:14,009 INFO L226 Difference]: Without dead ends: 206 [2021-12-06 22:42:14,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:42:14,010 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 283 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:42:14,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 52 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:42:14,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-12-06 22:42:14,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 178. [2021-12-06 22:42:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.1073446327683616) internal successors, (196), 177 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:42:14,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 196 transitions. [2021-12-06 22:42:14,022 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 196 transitions. Word has length 95 [2021-12-06 22:42:14,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:42:14,022 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 196 transitions. [2021-12-06 22:42:14,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:42:14,023 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 196 transitions. [2021-12-06 22:42:14,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 22:42:14,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:42:14,024 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:42:14,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 22:42:14,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 22:42:14,226 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:42:14,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:42:14,228 INFO L85 PathProgramCache]: Analyzing trace with hash -345123774, now seen corresponding path program 8 times [2021-12-06 22:42:14,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:42:14,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005790651] [2021-12-06 22:42:14,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:42:14,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:42:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-06 22:42:14,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:42:14,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005790651] [2021-12-06 22:42:14,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005790651] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:42:14,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370438759] [2021-12-06 22:42:14,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:42:14,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:42:14,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:42:14,342 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:42:14,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 22:42:14,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:42:14,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:42:14,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 22:42:14,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:42:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-06 22:42:14,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:42:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-06 22:42:14,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370438759] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:42:14,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:42:14,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-06 22:42:14,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960658342] [2021-12-06 22:42:14,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:42:14,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 22:42:14,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:42:14,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 22:42:14,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:42:14,621 INFO L87 Difference]: Start difference. First operand 178 states and 196 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:42:14,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:42:14,887 INFO L93 Difference]: Finished difference Result 194 states and 212 transitions. [2021-12-06 22:42:14,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 22:42:14,888 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-06 22:42:14,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:42:14,888 INFO L225 Difference]: With dead ends: 194 [2021-12-06 22:42:14,888 INFO L226 Difference]: Without dead ends: 126 [2021-12-06 22:42:14,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-12-06 22:42:14,889 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 179 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:42:14,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 29 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:42:14,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-06 22:42:14,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2021-12-06 22:42:14,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0956521739130434) internal successors, (126), 115 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:42:14,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2021-12-06 22:42:14,895 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 97 [2021-12-06 22:42:14,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:42:14,895 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2021-12-06 22:42:14,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:42:14,895 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2021-12-06 22:42:14,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-06 22:42:14,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:42:14,896 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:42:14,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 22:42:15,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 22:42:15,098 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:42:15,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:42:15,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1433123212, now seen corresponding path program 9 times [2021-12-06 22:42:15,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:42:15,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735996935] [2021-12-06 22:42:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:42:15,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:42:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:42:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 8 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:42:21,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:42:21,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735996935] [2021-12-06 22:42:21,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735996935] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:42:21,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795154247] [2021-12-06 22:42:21,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:42:21,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:42:21,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:42:21,462 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:42:21,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 22:42:21,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 22:42:21,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:42:21,536 WARN L261 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 188 conjunts are in the unsatisfiable core [2021-12-06 22:42:21,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:42:21,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 22:42:31,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:42:31,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:42:31,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:42:31,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:42:31,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2021-12-06 22:42:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 5 proven. 167 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:42:31,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:42:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 167 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 22:42:42,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795154247] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:42:42,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:42:42,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 26, 21] total 104 [2021-12-06 22:42:42,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749776509] [2021-12-06 22:42:42,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:42:42,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-06 22:42:42,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:42:42,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-06 22:42:42,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=612, Invalid=10099, Unknown=1, NotChecked=0, Total=10712 [2021-12-06 22:42:42,349 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 104 states, 104 states have (on average 3.1634615384615383) internal successors, (329), 104 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:43:02,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:43:02,889 INFO L93 Difference]: Finished difference Result 236 states and 258 transitions. [2021-12-06 22:43:02,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-12-06 22:43:02,889 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.1634615384615383) internal successors, (329), 104 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-12-06 22:43:02,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:43:02,891 INFO L225 Difference]: With dead ends: 236 [2021-12-06 22:43:02,891 INFO L226 Difference]: Without dead ends: 232 [2021-12-06 22:43:02,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 171 SyntacticMatches, 64 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 15974 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=2969, Invalid=40086, Unknown=1, NotChecked=0, Total=43056 [2021-12-06 22:43:02,894 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 1951 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 1951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 965 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:43:02,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 197 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 1951 Invalid, 0 Unknown, 965 Unchecked, 1.3s Time] [2021-12-06 22:43:02,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-06 22:43:02,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 171. [2021-12-06 22:43:02,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1) internal successors, (187), 170 states have internal predecessors, (187), 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) [2021-12-06 22:43:02,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 187 transitions. [2021-12-06 22:43:02,906 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 187 transitions. Word has length 115 [2021-12-06 22:43:02,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:43:02,906 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 187 transitions. [2021-12-06 22:43:02,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.1634615384615383) internal successors, (329), 104 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:43:02,906 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 187 transitions. [2021-12-06 22:43:02,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 22:43:02,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:43:02,907 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:43:02,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-06 22:43:03,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 22:43:03,109 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:43:03,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:43:03,110 INFO L85 PathProgramCache]: Analyzing trace with hash 154504470, now seen corresponding path program 10 times [2021-12-06 22:43:03,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:43:03,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697514649] [2021-12-06 22:43:03,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:03,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:43:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-06 22:43:03,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:43:03,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697514649] [2021-12-06 22:43:03,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697514649] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:43:03,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296932838] [2021-12-06 22:43:03,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:43:03,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:03,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:43:03,227 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:43:03,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 22:43:03,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:43:03,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:43:03,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 22:43:03,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:43:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-06 22:43:03,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:43:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-06 22:43:03,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296932838] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:43:03,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:43:03,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-06 22:43:03,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78460096] [2021-12-06 22:43:03,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:43:03,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 22:43:03,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:43:03,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 22:43:03,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:43:03,575 INFO L87 Difference]: Start difference. First operand 171 states and 187 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 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) [2021-12-06 22:43:03,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:43:03,917 INFO L93 Difference]: Finished difference Result 466 states and 514 transitions. [2021-12-06 22:43:03,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 22:43:03,918 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-12-06 22:43:03,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:43:03,919 INFO L225 Difference]: With dead ends: 466 [2021-12-06 22:43:03,919 INFO L226 Difference]: Without dead ends: 211 [2021-12-06 22:43:03,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-12-06 22:43:03,920 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 328 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:43:03,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 54 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:43:03,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-06 22:43:03,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 186. [2021-12-06 22:43:03,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.0864864864864865) internal successors, (201), 185 states have internal predecessors, (201), 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) [2021-12-06 22:43:03,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 201 transitions. [2021-12-06 22:43:03,931 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 201 transitions. Word has length 117 [2021-12-06 22:43:03,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:43:03,931 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 201 transitions. [2021-12-06 22:43:03,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 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) [2021-12-06 22:43:03,932 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 201 transitions. [2021-12-06 22:43:03,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 22:43:03,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:43:03,932 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:43:03,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 22:43:04,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 22:43:04,134 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:43:04,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:43:04,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1769140834, now seen corresponding path program 11 times [2021-12-06 22:43:04,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:43:04,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741963509] [2021-12-06 22:43:04,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:04,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:43:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-06 22:43:04,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:43:04,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741963509] [2021-12-06 22:43:04,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741963509] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:43:04,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851326378] [2021-12-06 22:43:04,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:43:04,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:04,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:43:04,219 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:43:04,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 22:43:05,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 22:43:05,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:43:05,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 22:43:05,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:43:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-06 22:43:05,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:43:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-06 22:43:05,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851326378] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:43:05,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:43:05,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-06 22:43:05,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245095570] [2021-12-06 22:43:05,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:43:05,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 22:43:05,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:43:05,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 22:43:05,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:43:05,305 INFO L87 Difference]: Start difference. First operand 186 states and 201 transitions. Second operand has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:43:05,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:43:05,647 INFO L93 Difference]: Finished difference Result 202 states and 217 transitions. [2021-12-06 22:43:05,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 22:43:05,648 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-12-06 22:43:05,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:43:05,649 INFO L225 Difference]: With dead ends: 202 [2021-12-06 22:43:05,649 INFO L226 Difference]: Without dead ends: 148 [2021-12-06 22:43:05,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 243 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2021-12-06 22:43:05,649 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 261 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:43:05,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 27 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:43:05,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-06 22:43:05,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 138. [2021-12-06 22:43:05,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0802919708029197) internal successors, (148), 137 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:43:05,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2021-12-06 22:43:05,659 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 125 [2021-12-06 22:43:05,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:43:05,659 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2021-12-06 22:43:05,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:43:05,659 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2021-12-06 22:43:05,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-06 22:43:05,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:43:05,660 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:43:05,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-06 22:43:05,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 22:43:05,861 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:43:05,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:43:05,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1639815466, now seen corresponding path program 12 times [2021-12-06 22:43:05,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:43:05,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785494232] [2021-12-06 22:43:05,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:05,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:43:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 4 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:43:16,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:43:16,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785494232] [2021-12-06 22:43:16,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785494232] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:43:16,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212197658] [2021-12-06 22:43:16,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:43:16,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:16,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:43:16,813 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:43:16,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 22:43:16,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 22:43:16,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:43:16,900 WARN L261 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 230 conjunts are in the unsatisfiable core [2021-12-06 22:43:16,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:43:17,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 22:43:23,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:43:23,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-12-06 22:43:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 3 proven. 271 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:43:23,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:43:40,548 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 22:43:40,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212197658] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:43:40,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:43:40,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 32, 25] total 142 [2021-12-06 22:43:40,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134461382] [2021-12-06 22:43:40,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:43:40,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2021-12-06 22:43:40,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:43:40,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2021-12-06 22:43:40,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=19119, Unknown=0, NotChecked=0, Total=20022 [2021-12-06 22:43:40,551 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand has 142 states, 142 states have (on average 2.7746478873239435) internal successors, (394), 142 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:44:02,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:44:02,955 INFO L93 Difference]: Finished difference Result 481 states and 522 transitions. [2021-12-06 22:44:02,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-12-06 22:44:02,955 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.7746478873239435) internal successors, (394), 142 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-12-06 22:44:02,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:44:02,957 INFO L225 Difference]: With dead ends: 481 [2021-12-06 22:44:02,957 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 22:44:02,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 196 SyntacticMatches, 69 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 20053 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=2722, Invalid=53210, Unknown=0, NotChecked=0, Total=55932 [2021-12-06 22:44:02,960 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 87 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 4607 mSolverCounterSat, 672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 8920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 672 IncrementalHoareTripleChecker+Valid, 4607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3641 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:44:02,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 268 Invalid, 8920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [672 Valid, 4607 Invalid, 0 Unknown, 3641 Unchecked, 3.1s Time] [2021-12-06 22:44:02,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 22:44:02,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 279. [2021-12-06 22:44:02,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.0827338129496402) internal successors, (301), 278 states have internal predecessors, (301), 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) [2021-12-06 22:44:02,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 301 transitions. [2021-12-06 22:44:02,983 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 301 transitions. Word has length 137 [2021-12-06 22:44:02,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:44:02,983 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 301 transitions. [2021-12-06 22:44:02,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 2.7746478873239435) internal successors, (394), 142 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:44:02,983 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 301 transitions. [2021-12-06 22:44:02,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 22:44:02,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:44:02,984 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:44:03,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 22:44:03,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:44:03,186 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:44:03,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:44:03,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1220040116, now seen corresponding path program 13 times [2021-12-06 22:44:03,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:44:03,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576969543] [2021-12-06 22:44:03,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:44:03,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:44:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-12-06 22:44:03,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:44:03,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576969543] [2021-12-06 22:44:03,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576969543] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:44:03,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267696116] [2021-12-06 22:44:03,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:44:03,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:44:03,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:44:03,321 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:44:03,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 22:44:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:03,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 22:44:03,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:44:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-12-06 22:44:03,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:44:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-12-06 22:44:03,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267696116] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:44:03,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:44:03,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-12-06 22:44:03,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198323238] [2021-12-06 22:44:03,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:44:03,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 22:44:03,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:44:03,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 22:44:03,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-06 22:44:03,685 INFO L87 Difference]: Start difference. First operand 279 states and 301 transitions. Second operand has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 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) [2021-12-06 22:44:04,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:44:04,092 INFO L93 Difference]: Finished difference Result 631 states and 684 transitions. [2021-12-06 22:44:04,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 22:44:04,092 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 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 139 [2021-12-06 22:44:04,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:44:04,093 INFO L225 Difference]: With dead ends: 631 [2021-12-06 22:44:04,094 INFO L226 Difference]: Without dead ends: 282 [2021-12-06 22:44:04,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2021-12-06 22:44:04,095 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 542 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:44:04,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 50 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:44:04,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-12-06 22:44:04,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 254. [2021-12-06 22:44:04,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.075098814229249) internal successors, (272), 253 states have internal predecessors, (272), 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) [2021-12-06 22:44:04,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 272 transitions. [2021-12-06 22:44:04,116 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 272 transitions. Word has length 139 [2021-12-06 22:44:04,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:44:04,116 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 272 transitions. [2021-12-06 22:44:04,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 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) [2021-12-06 22:44:04,116 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 272 transitions. [2021-12-06 22:44:04,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-06 22:44:04,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:44:04,117 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:44:04,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-06 22:44:04,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 22:44:04,319 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:44:04,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:44:04,320 INFO L85 PathProgramCache]: Analyzing trace with hash 917721134, now seen corresponding path program 14 times [2021-12-06 22:44:04,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:44:04,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326957323] [2021-12-06 22:44:04,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:44:04,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:44:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:04,444 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-12-06 22:44:04,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:44:04,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326957323] [2021-12-06 22:44:04,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326957323] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:44:04,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730725453] [2021-12-06 22:44:04,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:44:04,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:44:04,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:44:04,446 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:44:04,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 22:44:04,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:44:04,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:44:04,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 22:44:04,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:44:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-12-06 22:44:04,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:44:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-12-06 22:44:04,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730725453] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:44:04,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:44:04,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-12-06 22:44:04,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771869167] [2021-12-06 22:44:04,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:44:04,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 22:44:04,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:44:04,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 22:44:04,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-06 22:44:04,783 INFO L87 Difference]: Start difference. First operand 254 states and 272 transitions. Second operand has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 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) [2021-12-06 22:44:05,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:44:05,206 INFO L93 Difference]: Finished difference Result 270 states and 288 transitions. [2021-12-06 22:44:05,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 22:44:05,206 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 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 141 [2021-12-06 22:44:05,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:44:05,207 INFO L225 Difference]: With dead ends: 270 [2021-12-06 22:44:05,207 INFO L226 Difference]: Without dead ends: 170 [2021-12-06 22:44:05,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 272 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 22:44:05,208 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 489 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 488 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:44:05,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 24 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [488 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:44:05,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-06 22:44:05,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2021-12-06 22:44:05,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.069182389937107) internal successors, (170), 159 states have internal predecessors, (170), 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) [2021-12-06 22:44:05,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 170 transitions. [2021-12-06 22:44:05,219 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 170 transitions. Word has length 141 [2021-12-06 22:44:05,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:44:05,219 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 170 transitions. [2021-12-06 22:44:05,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 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) [2021-12-06 22:44:05,219 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 170 transitions. [2021-12-06 22:44:05,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-06 22:44:05,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:44:05,220 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:44:05,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 22:44:05,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 22:44:05,422 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:44:05,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:44:05,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1284366496, now seen corresponding path program 15 times [2021-12-06 22:44:05,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:44:05,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033105297] [2021-12-06 22:44:05,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:44:05,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:44:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 18 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:44:24,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:44:24,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033105297] [2021-12-06 22:44:24,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033105297] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:44:24,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903857071] [2021-12-06 22:44:24,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:44:24,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:44:24,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:44:24,753 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:44:24,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 22:44:24,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-06 22:44:24,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:44:24,870 WARN L261 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 272 conjunts are in the unsatisfiable core [2021-12-06 22:44:24,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:44:24,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 22:44:35,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:44:35,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:44:35,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:44:35,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:44:35,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:44:35,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:44:35,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:44:35,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:44:35,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:44:35,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:44:35,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 99 [2021-12-06 22:44:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 7 proven. 380 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 22:44:35,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:44:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 371 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 22:44:59,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903857071] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:44:59,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:44:59,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 35, 29] total 173 [2021-12-06 22:44:59,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932530144] [2021-12-06 22:44:59,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:44:59,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2021-12-06 22:44:59,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:44:59,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2021-12-06 22:44:59,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=28421, Unknown=0, NotChecked=0, Total=29756 [2021-12-06 22:44:59,139 INFO L87 Difference]: Start difference. First operand 160 states and 170 transitions. Second operand has 173 states, 173 states have (on average 2.6242774566473988) internal successors, (454), 173 states have internal predecessors, (454), 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) [2021-12-06 22:45:53,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:53,804 INFO L93 Difference]: Finished difference Result 472 states and 508 transitions. [2021-12-06 22:45:53,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2021-12-06 22:45:53,804 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 2.6242774566473988) internal successors, (454), 173 states have internal predecessors, (454), 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 159 [2021-12-06 22:45:53,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:53,806 INFO L225 Difference]: With dead ends: 472 [2021-12-06 22:45:53,806 INFO L226 Difference]: Without dead ends: 468 [2021-12-06 22:45:53,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 235 SyntacticMatches, 62 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 34954 ImplicationChecksByTransitivity, 86.8s TimeCoverageRelationStatistics Valid=5732, Invalid=95074, Unknown=0, NotChecked=0, Total=100806 [2021-12-06 22:45:53,811 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 101 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 6978 mSolverCounterSat, 1005 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 12809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1005 IncrementalHoareTripleChecker+Valid, 6978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4826 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:45:53,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 324 Invalid, 12809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1005 Valid, 6978 Invalid, 0 Unknown, 4826 Unchecked, 5.1s Time] [2021-12-06 22:45:53,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-12-06 22:45:53,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 321. [2021-12-06 22:45:53,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.075) internal successors, (344), 320 states have internal predecessors, (344), 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) [2021-12-06 22:45:53,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 344 transitions. [2021-12-06 22:45:53,840 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 344 transitions. Word has length 159 [2021-12-06 22:45:53,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:53,840 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 344 transitions. [2021-12-06 22:45:53,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 2.6242774566473988) internal successors, (454), 173 states have internal predecessors, (454), 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) [2021-12-06 22:45:53,841 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 344 transitions. [2021-12-06 22:45:53,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-06 22:45:53,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:53,841 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:53,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 22:45:54,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 22:45:54,043 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:45:54,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:54,044 INFO L85 PathProgramCache]: Analyzing trace with hash 762190594, now seen corresponding path program 16 times [2021-12-06 22:45:54,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:54,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491901064] [2021-12-06 22:45:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:54,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-12-06 22:45:54,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:54,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491901064] [2021-12-06 22:45:54,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491901064] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:45:54,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784385142] [2021-12-06 22:45:54,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:45:54,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:45:54,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:45:54,196 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:45:54,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 22:45:54,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:45:54,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:45:54,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 22:45:54,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:45:54,511 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-12-06 22:45:54,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:45:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-12-06 22:45:54,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784385142] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:45:54,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:45:54,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-12-06 22:45:54,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200174235] [2021-12-06 22:45:54,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:45:54,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 22:45:54,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:54,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 22:45:54,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-12-06 22:45:54,648 INFO L87 Difference]: Start difference. First operand 321 states and 344 transitions. Second operand has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 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) [2021-12-06 22:45:55,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:55,190 INFO L93 Difference]: Finished difference Result 723 states and 778 transitions. [2021-12-06 22:45:55,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 22:45:55,190 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 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 161 [2021-12-06 22:45:55,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:55,192 INFO L225 Difference]: With dead ends: 723 [2021-12-06 22:45:55,192 INFO L226 Difference]: Without dead ends: 320 [2021-12-06 22:45:55,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 22:45:55,193 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 604 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 695 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:45:55,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 43 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [695 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:45:55,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-12-06 22:45:55,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 292. [2021-12-06 22:45:55,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.0652920962199313) internal successors, (310), 291 states have internal predecessors, (310), 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) [2021-12-06 22:45:55,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 310 transitions. [2021-12-06 22:45:55,213 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 310 transitions. Word has length 161 [2021-12-06 22:45:55,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:55,213 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 310 transitions. [2021-12-06 22:45:55,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 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) [2021-12-06 22:45:55,213 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 310 transitions. [2021-12-06 22:45:55,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-06 22:45:55,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:55,214 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:55,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 22:45:55,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:45:55,416 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:45:55,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:55,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1829243748, now seen corresponding path program 17 times [2021-12-06 22:45:55,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:55,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117599443] [2021-12-06 22:45:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:55,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-12-06 22:45:55,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:55,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117599443] [2021-12-06 22:45:55,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117599443] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:45:55,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092387213] [2021-12-06 22:45:55,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:45:55,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:45:55,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:45:55,565 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:45:55,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 22:45:55,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-06 22:45:55,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:45:55,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 22:45:55,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:45:56,111 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-12-06 22:45:56,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:45:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-12-06 22:45:56,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092387213] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:45:56,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:45:56,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-12-06 22:45:56,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534105155] [2021-12-06 22:45:56,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:45:56,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 22:45:56,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:56,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 22:45:56,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-12-06 22:45:56,261 INFO L87 Difference]: Start difference. First operand 292 states and 310 transitions. Second operand has 26 states, 26 states have (on average 5.423076923076923) internal successors, (141), 26 states have internal predecessors, (141), 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) [2021-12-06 22:45:56,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:56,737 INFO L93 Difference]: Finished difference Result 308 states and 326 transitions. [2021-12-06 22:45:56,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 22:45:56,738 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.423076923076923) internal successors, (141), 26 states have internal predecessors, (141), 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 163 [2021-12-06 22:45:56,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:56,739 INFO L225 Difference]: With dead ends: 308 [2021-12-06 22:45:56,739 INFO L226 Difference]: Without dead ends: 192 [2021-12-06 22:45:56,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 317 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 22:45:56,740 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 380 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:45:56,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 32 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:45:56,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-06 22:45:56,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 182. [2021-12-06 22:45:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.0607734806629834) internal successors, (192), 181 states have internal predecessors, (192), 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) [2021-12-06 22:45:56,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 192 transitions. [2021-12-06 22:45:56,755 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 192 transitions. Word has length 163 [2021-12-06 22:45:56,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:56,756 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 192 transitions. [2021-12-06 22:45:56,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.423076923076923) internal successors, (141), 26 states have internal predecessors, (141), 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) [2021-12-06 22:45:56,756 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 192 transitions. [2021-12-06 22:45:56,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-12-06 22:45:56,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:56,756 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:56,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 22:45:56,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:45:56,957 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:45:56,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:56,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1507735830, now seen corresponding path program 18 times [2021-12-06 22:45:56,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:56,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92978979] [2021-12-06 22:45:56,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:56,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 36 proven. 503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:26,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:26,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92978979] [2021-12-06 22:46:26,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92978979] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:26,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687900349] [2021-12-06 22:46:26,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:46:26,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:26,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:26,591 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:26,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 22:46:26,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 22:46:26,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:46:26,769 WARN L261 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 314 conjunts are in the unsatisfiable core [2021-12-06 22:46:26,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:26,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 22:46:47,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:47,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:47,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 90 treesize of output 243 [2021-12-06 22:46:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 11 proven. 503 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 22:46:48,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:47:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 503 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 22:47:19,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687900349] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:47:19,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:47:19,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 38, 33] total 196 [2021-12-06 22:47:19,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415544770] [2021-12-06 22:47:19,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:47:19,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 196 states [2021-12-06 22:47:19,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:47:19,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2021-12-06 22:47:19,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1512, Invalid=36708, Unknown=0, NotChecked=0, Total=38220 [2021-12-06 22:47:19,022 INFO L87 Difference]: Start difference. First operand 182 states and 192 transitions. Second operand has 196 states, 196 states have (on average 2.627551020408163) internal successors, (515), 196 states have internal predecessors, (515), 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) [2021-12-06 22:49:02,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:49:02,967 INFO L93 Difference]: Finished difference Result 571 states and 608 transitions. [2021-12-06 22:49:02,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 264 states. [2021-12-06 22:49:02,968 INFO L78 Accepts]: Start accepts. Automaton has has 196 states, 196 states have (on average 2.627551020408163) internal successors, (515), 196 states have internal predecessors, (515), 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 181 [2021-12-06 22:49:02,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:49:02,970 INFO L225 Difference]: With dead ends: 571 [2021-12-06 22:49:02,970 INFO L226 Difference]: Without dead ends: 567 [2021-12-06 22:49:02,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 275 SyntacticMatches, 69 SemanticMatches, 405 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57992 ImplicationChecksByTransitivity, 158.5s TimeCoverageRelationStatistics Valid=7719, Invalid=157523, Unknown=0, NotChecked=0, Total=165242 [2021-12-06 22:49:02,985 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 168 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 8651 mSolverCounterSat, 1152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 15249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1152 IncrementalHoareTripleChecker+Valid, 8651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5446 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:49:02,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 355 Invalid, 15249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1152 Valid, 8651 Invalid, 0 Unknown, 5446 Unchecked, 7.0s Time] [2021-12-06 22:49:02,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-12-06 22:49:03,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 365. [2021-12-06 22:49:03,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.065934065934066) internal successors, (388), 364 states have internal predecessors, (388), 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) [2021-12-06 22:49:03,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 388 transitions. [2021-12-06 22:49:03,024 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 388 transitions. Word has length 181 [2021-12-06 22:49:03,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:49:03,024 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 388 transitions. [2021-12-06 22:49:03,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 196 states, 196 states have (on average 2.627551020408163) internal successors, (515), 196 states have internal predecessors, (515), 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) [2021-12-06 22:49:03,025 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 388 transitions. [2021-12-06 22:49:03,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-06 22:49:03,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:49:03,026 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:49:03,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 22:49:03,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 22:49:03,227 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:49:03,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:49:03,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1338163400, now seen corresponding path program 19 times [2021-12-06 22:49:03,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:49:03,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613472093] [2021-12-06 22:49:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:49:03,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:49:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-12-06 22:49:03,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:49:03,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613472093] [2021-12-06 22:49:03,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613472093] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:49:03,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319364686] [2021-12-06 22:49:03,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:49:03,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:49:03,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:49:03,377 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:49:03,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 22:49:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:03,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 22:49:03,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:49:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-12-06 22:49:03,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:49:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-12-06 22:49:03,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319364686] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:49:03,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:49:03,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-12-06 22:49:03,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878258490] [2021-12-06 22:49:03,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:49:03,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 22:49:03,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:49:03,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 22:49:03,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-12-06 22:49:03,853 INFO L87 Difference]: Start difference. First operand 365 states and 388 transitions. Second operand has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 states have internal predecessors, (97), 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) [2021-12-06 22:49:04,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:49:04,461 INFO L93 Difference]: Finished difference Result 817 states and 872 transitions. [2021-12-06 22:49:04,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 22:49:04,462 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 states have internal predecessors, (97), 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 183 [2021-12-06 22:49:04,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:49:04,463 INFO L225 Difference]: With dead ends: 817 [2021-12-06 22:49:04,463 INFO L226 Difference]: Without dead ends: 358 [2021-12-06 22:49:04,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 22:49:04,464 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 571 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 647 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 647 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:49:04,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 57 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [647 Valid, 1133 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:49:04,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-12-06 22:49:04,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 330. [2021-12-06 22:49:04,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.0577507598784195) internal successors, (348), 329 states have internal predecessors, (348), 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) [2021-12-06 22:49:04,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 348 transitions. [2021-12-06 22:49:04,489 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 348 transitions. Word has length 183 [2021-12-06 22:49:04,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:49:04,489 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 348 transitions. [2021-12-06 22:49:04,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 states have internal predecessors, (97), 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) [2021-12-06 22:49:04,489 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 348 transitions. [2021-12-06 22:49:04,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-06 22:49:04,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:49:04,490 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:49:04,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 22:49:04,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:49:04,692 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:49:04,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:49:04,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1952015846, now seen corresponding path program 20 times [2021-12-06 22:49:04,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:49:04,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041575210] [2021-12-06 22:49:04,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:49:04,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:49:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2021-12-06 22:49:04,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:49:04,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041575210] [2021-12-06 22:49:04,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041575210] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:49:04,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150253953] [2021-12-06 22:49:04,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:49:04,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:49:04,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:49:04,850 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:49:04,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 22:49:04,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:49:04,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:49:04,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 22:49:04,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:49:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2021-12-06 22:49:05,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:49:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2021-12-06 22:49:05,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150253953] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:49:05,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:49:05,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-12-06 22:49:05,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125875653] [2021-12-06 22:49:05,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:49:05,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 22:49:05,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:49:05,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 22:49:05,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-12-06 22:49:05,357 INFO L87 Difference]: Start difference. First operand 330 states and 348 transitions. Second operand has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 states have internal predecessors, (97), 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) [2021-12-06 22:49:05,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:49:05,977 INFO L93 Difference]: Finished difference Result 346 states and 364 transitions. [2021-12-06 22:49:05,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 22:49:05,978 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 states have internal predecessors, (97), 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 185 [2021-12-06 22:49:05,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:49:05,979 INFO L225 Difference]: With dead ends: 346 [2021-12-06 22:49:05,979 INFO L226 Difference]: Without dead ends: 214 [2021-12-06 22:49:05,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 358 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=441, Invalid=1539, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 22:49:05,979 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 549 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:49:05,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 40 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:49:05,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-06 22:49:05,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 204. [2021-12-06 22:49:05,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0541871921182266) internal successors, (214), 203 states have internal predecessors, (214), 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) [2021-12-06 22:49:05,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 214 transitions. [2021-12-06 22:49:05,996 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 214 transitions. Word has length 185 [2021-12-06 22:49:05,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:49:05,997 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 214 transitions. [2021-12-06 22:49:05,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 states have internal predecessors, (97), 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) [2021-12-06 22:49:05,997 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 214 transitions. [2021-12-06 22:49:05,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-06 22:49:05,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:49:05,998 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:49:06,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 22:49:06,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:49:06,199 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:49:06,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:49:06,201 INFO L85 PathProgramCache]: Analyzing trace with hash -442087860, now seen corresponding path program 21 times [2021-12-06 22:49:06,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:49:06,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234515060] [2021-12-06 22:49:06,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:49:06,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:49:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 64 proven. 640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:49:45,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:49:45,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234515060] [2021-12-06 22:49:45,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234515060] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:49:45,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117993906] [2021-12-06 22:49:45,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:49:45,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:49:45,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:49:45,703 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:49:45,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 22:49:45,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 22:49:45,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:49:45,921 WARN L261 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 356 conjunts are in the unsatisfiable core [2021-12-06 22:49:45,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:49:46,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 22:50:15,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:50:15,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:50:15,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:50:15,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:50:15,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:50:15,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:50:15,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:50:15,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:50:15,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:50:15,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:50:15,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:50:15,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:50:15,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:50:15,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:50:15,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:50:15,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:50:15,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:50:15,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:50:15,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:50:15,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 72 treesize of output 163 [2021-12-06 22:50:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 9 proven. 679 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 22:50:16,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:51:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 0 proven. 655 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 22:51:02,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117993906] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:51:02,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:51:02,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [152, 44, 37] total 224 [2021-12-06 22:51:02,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093007455] [2021-12-06 22:51:02,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:51:02,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 224 states [2021-12-06 22:51:02,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:51:02,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2021-12-06 22:51:02,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2195, Invalid=47756, Unknown=1, NotChecked=0, Total=49952 [2021-12-06 22:51:02,442 INFO L87 Difference]: Start difference. First operand 204 states and 214 transitions. Second operand has 224 states, 224 states have (on average 2.5892857142857144) internal successors, (580), 224 states have internal predecessors, (580), 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) [2021-12-06 22:52:59,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:52:59,722 INFO L93 Difference]: Finished difference Result 657 states and 697 transitions. [2021-12-06 22:52:59,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 287 states. [2021-12-06 22:52:59,722 INFO L78 Accepts]: Start accepts. Automaton has has 224 states, 224 states have (on average 2.5892857142857144) internal successors, (580), 224 states have internal predecessors, (580), 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 203 [2021-12-06 22:52:59,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:52:59,725 INFO L225 Difference]: With dead ends: 657 [2021-12-06 22:52:59,725 INFO L226 Difference]: Without dead ends: 653 [2021-12-06 22:52:59,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 828 GetRequests, 304 SyntacticMatches, 81 SemanticMatches, 443 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 75543 ImplicationChecksByTransitivity, 194.9s TimeCoverageRelationStatistics Valid=8085, Invalid=189494, Unknown=1, NotChecked=0, Total=197580 [2021-12-06 22:52:59,734 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 123 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 8015 mSolverCounterSat, 1438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 14784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1438 IncrementalHoareTripleChecker+Valid, 8015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5331 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:52:59,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 292 Invalid, 14784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1438 Valid, 8015 Invalid, 0 Unknown, 5331 Unchecked, 8.4s Time] [2021-12-06 22:52:59,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-12-06 22:52:59,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 409. [2021-12-06 22:52:59,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 1.0588235294117647) internal successors, (432), 408 states have internal predecessors, (432), 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) [2021-12-06 22:52:59,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 432 transitions. [2021-12-06 22:52:59,781 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 432 transitions. Word has length 203 [2021-12-06 22:52:59,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:52:59,782 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 432 transitions. [2021-12-06 22:52:59,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 224 states, 224 states have (on average 2.5892857142857144) internal successors, (580), 224 states have internal predecessors, (580), 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) [2021-12-06 22:52:59,782 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 432 transitions. [2021-12-06 22:52:59,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-06 22:52:59,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:52:59,783 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:52:59,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 22:52:59,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:52:59,984 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:52:59,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:52:59,984 INFO L85 PathProgramCache]: Analyzing trace with hash 482440942, now seen corresponding path program 22 times [2021-12-06 22:52:59,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:52:59,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719225846] [2021-12-06 22:52:59,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:52:59,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:53:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:53:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-12-06 22:53:00,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:53:00,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719225846] [2021-12-06 22:53:00,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719225846] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:53:00,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324656698] [2021-12-06 22:53:00,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:53:00,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:53:00,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:53:00,138 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:53:00,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 22:53:00,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:53:00,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:53:00,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 22:53:00,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:53:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-12-06 22:53:00,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:53:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-12-06 22:53:00,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324656698] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:53:00,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:53:00,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2021-12-06 22:53:00,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450541824] [2021-12-06 22:53:00,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:53:00,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 22:53:00,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:53:00,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 22:53:00,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-12-06 22:53:00,685 INFO L87 Difference]: Start difference. First operand 409 states and 432 transitions. Second operand has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 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) [2021-12-06 22:53:01,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:53:01,377 INFO L93 Difference]: Finished difference Result 893 states and 947 transitions. [2021-12-06 22:53:01,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 22:53:01,378 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 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 205 [2021-12-06 22:53:01,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:53:01,379 INFO L225 Difference]: With dead ends: 893 [2021-12-06 22:53:01,379 INFO L226 Difference]: Without dead ends: 396 [2021-12-06 22:53:01,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 22:53:01,380 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 602 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 648 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 648 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:53:01,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 57 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [648 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 22:53:01,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-12-06 22:53:01,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 368. [2021-12-06 22:53:01,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.0517711171662125) internal successors, (386), 367 states have internal predecessors, (386), 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) [2021-12-06 22:53:01,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 386 transitions. [2021-12-06 22:53:01,411 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 386 transitions. Word has length 205 [2021-12-06 22:53:01,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:53:01,411 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 386 transitions. [2021-12-06 22:53:01,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 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) [2021-12-06 22:53:01,411 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 386 transitions. [2021-12-06 22:53:01,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-06 22:53:01,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:53:01,412 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:53:01,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 22:53:01,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 22:53:01,614 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:53:01,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:53:01,616 INFO L85 PathProgramCache]: Analyzing trace with hash -737977264, now seen corresponding path program 23 times [2021-12-06 22:53:01,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:53:01,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705548385] [2021-12-06 22:53:01,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:53:01,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:53:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:53:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2021-12-06 22:53:01,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:53:01,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705548385] [2021-12-06 22:53:01,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705548385] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:53:01,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212093709] [2021-12-06 22:53:01,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:53:01,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:53:01,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:53:01,803 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:53:01,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 22:53:02,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-06 22:53:02,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:53:02,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 22:53:02,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:53:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2021-12-06 22:53:02,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:53:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2021-12-06 22:53:02,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212093709] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:53:02,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:53:02,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2021-12-06 22:53:02,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661181295] [2021-12-06 22:53:02,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:53:02,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 22:53:02,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:53:02,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 22:53:02,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-12-06 22:53:02,866 INFO L87 Difference]: Start difference. First operand 368 states and 386 transitions. Second operand has 32 states, 32 states have (on average 4.1875) internal successors, (134), 32 states have internal predecessors, (134), 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) [2021-12-06 22:53:03,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:53:03,508 INFO L93 Difference]: Finished difference Result 384 states and 402 transitions. [2021-12-06 22:53:03,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 22:53:03,509 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.1875) internal successors, (134), 32 states have internal predecessors, (134), 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 207 [2021-12-06 22:53:03,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:53:03,510 INFO L225 Difference]: With dead ends: 384 [2021-12-06 22:53:03,510 INFO L226 Difference]: Without dead ends: 236 [2021-12-06 22:53:03,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 401 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=539, Invalid=1911, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 22:53:03,511 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 654 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:53:03,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 31 Invalid, 1738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:53:03,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-06 22:53:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 226. [2021-12-06 22:53:03,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.048888888888889) internal successors, (236), 225 states have internal predecessors, (236), 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) [2021-12-06 22:53:03,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 236 transitions. [2021-12-06 22:53:03,532 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 236 transitions. Word has length 207 [2021-12-06 22:53:03,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:53:03,532 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 236 transitions. [2021-12-06 22:53:03,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.1875) internal successors, (134), 32 states have internal predecessors, (134), 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) [2021-12-06 22:53:03,532 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 236 transitions. [2021-12-06 22:53:03,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-06 22:53:03,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:53:03,533 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:53:03,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 22:53:03,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 22:53:03,735 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:53:03,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:53:03,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1813600510, now seen corresponding path program 24 times [2021-12-06 22:53:03,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:53:03,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116391530] [2021-12-06 22:53:03,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:53:03,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:53:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 70 proven. 821 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:00,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:00,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116391530] [2021-12-06 22:54:00,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116391530] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:54:00,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768622040] [2021-12-06 22:54:00,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:54:00,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:00,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:54:00,944 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:54:00,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0981e738-7b44-497e-897c-f2d6b5364304/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 22:54:01,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-06 22:54:01,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:54:01,175 WARN L261 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 398 conjunts are in the unsatisfiable core [2021-12-06 22:54:01,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:54:02,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 22:54:27,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:54:27,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:54:27,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:54:27,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:54:27,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51