./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array10_pattern.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_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/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_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array10_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/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_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/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 0942a0394519a722254bfe5a1820a904a71ba1b47e3e66c2c8dc2abe6585692f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:04:00,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:04:00,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:04:00,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:04:00,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:04:00,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:04:00,702 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:04:00,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:04:00,705 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:04:00,706 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:04:00,707 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:04:00,708 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:04:00,708 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:04:00,709 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:04:00,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:04:00,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:04:00,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:04:00,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:04:00,714 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:04:00,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:04:00,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:04:00,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:04:00,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:04:00,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:04:00,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:04:00,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:04:00,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:04:00,725 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:04:00,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:04:00,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:04:00,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:04:00,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:04:00,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:04:00,728 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:04:00,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:04:00,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:04:00,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:04:00,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:04:00,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:04:00,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:04:00,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:04:00,732 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:04:00,751 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:04:00,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:04:00,751 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:04:00,751 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:04:00,752 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:04:00,752 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:04:00,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:04:00,753 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:04:00,753 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:04:00,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:04:00,753 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:04:00,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:04:00,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:04:00,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:04:00,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:04:00,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:04:00,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:04:00,754 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:04:00,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:04:00,754 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:04:00,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:04:00,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:04:00,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:04:00,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:04:00,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:04:00,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:04:00,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:04:00,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:04:00,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:04:00,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:04:00,761 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:04:00,761 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:04:00,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:04:00,761 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:04:00,761 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_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0942a0394519a722254bfe5a1820a904a71ba1b47e3e66c2c8dc2abe6585692f [2021-12-06 18:04:00,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:04:00,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:04:00,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:04:00,968 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:04:00,969 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:04:00,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-patterns/array10_pattern.c [2021-12-06 18:04:01,011 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/data/120928854/19ece31177e1425ead1cdc964e6233e7/FLAG20c841e5e [2021-12-06 18:04:01,364 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:04:01,365 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/sv-benchmarks/c/array-patterns/array10_pattern.c [2021-12-06 18:04:01,370 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/data/120928854/19ece31177e1425ead1cdc964e6233e7/FLAG20c841e5e [2021-12-06 18:04:01,808 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/data/120928854/19ece31177e1425ead1cdc964e6233e7 [2021-12-06 18:04:01,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:04:01,813 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:04:01,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:04:01,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:04:01,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:04:01,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:04:01" (1/1) ... [2021-12-06 18:04:01,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35a87ffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:04:01, skipping insertion in model container [2021-12-06 18:04:01,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:04:01" (1/1) ... [2021-12-06 18:04:01,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:04:01,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:04:01,930 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_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/sv-benchmarks/c/array-patterns/array10_pattern.c[1326,1339] [2021-12-06 18:04:01,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:04:01,951 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:04:01,961 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_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/sv-benchmarks/c/array-patterns/array10_pattern.c[1326,1339] [2021-12-06 18:04:01,971 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:04:01,983 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:04:01,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:04:01 WrapperNode [2021-12-06 18:04:01,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:04:01,984 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:04:01,984 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:04:01,984 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:04:01,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:04:01" (1/1) ... [2021-12-06 18:04:01,994 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:04:01" (1/1) ... [2021-12-06 18:04:02,015 INFO L137 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2021-12-06 18:04:02,016 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:04:02,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:04:02,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:04:02,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:04:02,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:04:01" (1/1) ... [2021-12-06 18:04:02,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:04:01" (1/1) ... [2021-12-06 18:04:02,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:04:01" (1/1) ... [2021-12-06 18:04:02,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:04:01" (1/1) ... [2021-12-06 18:04:02,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:04:01" (1/1) ... [2021-12-06 18:04:02,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:04:01" (1/1) ... [2021-12-06 18:04:02,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:04:01" (1/1) ... [2021-12-06 18:04:02,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:04:02,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:04:02,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:04:02,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:04:02,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:04:01" (1/1) ... [2021-12-06 18:04:02,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:04:02,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:04:02,067 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:04:02,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:04:02,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:04:02,105 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 18:04:02,105 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 18:04:02,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:04:02,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:04:02,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 18:04:02,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:04:02,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:04:02,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 18:04:02,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:04:02,176 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:04:02,177 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:04:02,295 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:04:02,301 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:04:02,302 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 18:04:02,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:04:02 BoogieIcfgContainer [2021-12-06 18:04:02,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:04:02,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:04:02,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:04:02,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:04:02,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:04:01" (1/3) ... [2021-12-06 18:04:02,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@282b9f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:04:02, skipping insertion in model container [2021-12-06 18:04:02,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:04:01" (2/3) ... [2021-12-06 18:04:02,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@282b9f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:04:02, skipping insertion in model container [2021-12-06 18:04:02,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:04:02" (3/3) ... [2021-12-06 18:04:02,312 INFO L111 eAbstractionObserver]: Analyzing ICFG array10_pattern.c [2021-12-06 18:04:02,316 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:04:02,317 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:04:02,351 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:04:02,356 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 18:04:02,356 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:04:02,368 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:04:02,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 18:04:02,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:04:02,372 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:04:02,373 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:04:02,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:04:02,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1199380475, now seen corresponding path program 1 times [2021-12-06 18:04:02,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:04:02,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168788452] [2021-12-06 18:04:02,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:04:02,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:04:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:04:02,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:04:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:04:02,491 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 18:04:02,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:04:02,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168788452] [2021-12-06 18:04:02,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168788452] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:04:02,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:04:02,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:04:02,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837778759] [2021-12-06 18:04:02,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:04:02,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:04:02,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:04:02,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:04:02,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:04:02,520 INFO L87 Difference]: Start difference. First operand has 27 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:04:02,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:04:02,534 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2021-12-06 18:04:02,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:04:02,536 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-06 18:04:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:04:02,543 INFO L225 Difference]: With dead ends: 51 [2021-12-06 18:04:02,543 INFO L226 Difference]: Without dead ends: 23 [2021-12-06 18:04:02,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 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 18:04:02,549 INFO L933 BasicCegarLoop]: 31 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, 31 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 18:04:02,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:04:02,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-06 18:04:02,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-06 18:04:02,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:04:02,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-06 18:04:02,576 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2021-12-06 18:04:02,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:04:02,576 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-06 18:04:02,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:04:02,576 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-06 18:04:02,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 18:04:02,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:04:02,578 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:04:02,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:04:02,578 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:04:02,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:04:02,579 INFO L85 PathProgramCache]: Analyzing trace with hash 966180883, now seen corresponding path program 1 times [2021-12-06 18:04:02,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:04:02,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841050023] [2021-12-06 18:04:02,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:04:02,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:04:02,606 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:04:02,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582584966] [2021-12-06 18:04:02,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:04:02,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:04:02,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:04:02,607 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:04:02,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:04:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:04:02,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:04:02,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:04:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:02,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:04:02,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:04:02,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841050023] [2021-12-06 18:04:02,752 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:04:02,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582584966] [2021-12-06 18:04:02,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582584966] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:04:02,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:04:02,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:04:02,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613467536] [2021-12-06 18:04:02,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:04:02,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:04:02,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:04:02,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:04:02,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:04:02,754 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:04:02,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:04:02,813 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2021-12-06 18:04:02,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:04:02,814 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-12-06 18:04:02,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:04:02,815 INFO L225 Difference]: With dead ends: 48 [2021-12-06 18:04:02,815 INFO L226 Difference]: Without dead ends: 31 [2021-12-06 18:04:02,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:04:02,817 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:04:02,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 56 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:04:02,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-06 18:04:02,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-12-06 18:04:02,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:04:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-12-06 18:04:02,823 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2021-12-06 18:04:02,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:04:02,823 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-12-06 18:04:02,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:04:02,823 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-12-06 18:04:02,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 18:04:02,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:04:02,824 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 18:04:02,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:04:03,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:04:03,026 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:04:03,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:04:03,029 INFO L85 PathProgramCache]: Analyzing trace with hash -760544265, now seen corresponding path program 1 times [2021-12-06 18:04:03,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:04:03,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721774780] [2021-12-06 18:04:03,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:04:03,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:04:03,117 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:04:03,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517255013] [2021-12-06 18:04:03,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:04:03,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:04:03,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:04:03,122 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:04:03,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:04:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:04:03,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 18:04:03,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:04:03,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 18:04:03,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:03,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-06 18:04:03,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-06 18:04:03,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-06 18:04:03,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-06 18:04:03,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2021-12-06 18:04:03,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:03,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:04:03,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 61 [2021-12-06 18:04:03,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:03,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 15 [2021-12-06 18:04:05,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 132 [2021-12-06 18:04:05,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:04:05,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:05,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 86 [2021-12-06 18:04:05,122 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 18:04:05,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:05,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 20 [2021-12-06 18:04:06,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:04:06,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-12-06 18:04:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:06,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:12:40,330 WARN L860 $PredicateComparison]: unable to prove that (and (forall ((|aux_div_ULTIMATE.start_main_~index~0#1_49| Int) (|aux_mod_ULTIMATE.start_main_~index~0#1_49| Int) (v_ArrVal_63 Int)) (let ((.cse0 (+ |aux_mod_ULTIMATE.start_main_~index~0#1_49| (* 4294967296 |aux_div_ULTIMATE.start_main_~index~0#1_49|)))) (or (< .cse0 0) (<= |aux_mod_ULTIMATE.start_main_~index~0#1_49| 2147483647) (let ((.cse8 (* (mod |aux_mod_ULTIMATE.start_main_~index~0#1_49| 4294967296) 4))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 17179869184) .cse8) v_ArrVal_63)))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| (- 17179869184) .cse8))) (let ((.cse5 (mod (select .cse3 .cse4) 4294967296)) (.cse6 (div (+ (- 1) c_~ARR_SIZE~0 (* c_~ARR_SIZE~0 c_~ARR_SIZE~0)) 4))) (and (or (<= (let ((.cse1 (store .cse3 .cse4 .cse5))) (+ (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select (select (store .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) .cse6) (< 2147483647 .cse5)) (<= (let ((.cse7 (store .cse3 .cse4 (+ .cse5 (- 4294967296))))) (+ (select .cse7 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select (select (store .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse7) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|)) .cse6)))))) (<= c_~ARR_SIZE~0 .cse0) (and (forall ((|ULTIMATE.start_main_~num~0#1| Int)) (let ((.cse9 (mod (* |ULTIMATE.start_main_~num~0#1| (* |ULTIMATE.start_main_~num~0#1| (* |ULTIMATE.start_main_~num~0#1| (* |ULTIMATE.start_main_~num~0#1| (+ (* |aux_div_ULTIMATE.start_main_~index~0#1_49| 4294967296) |aux_mod_ULTIMATE.start_main_~index~0#1_49|))))) 4294967296))) (or (< 2147483647 .cse9) (< .cse9 v_ArrVal_63)))) (forall ((|ULTIMATE.start_main_~num~0#1| Int)) (let ((.cse10 (mod (* |ULTIMATE.start_main_~num~0#1| (* |ULTIMATE.start_main_~num~0#1| (* |ULTIMATE.start_main_~num~0#1| (* |ULTIMATE.start_main_~num~0#1| (+ (* |aux_div_ULTIMATE.start_main_~index~0#1_49| 4294967296) |aux_mod_ULTIMATE.start_main_~index~0#1_49|))))) 4294967296))) (or (< .cse10 (+ 4294967296 v_ArrVal_63)) (<= .cse10 2147483647))))) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~index~0#1_49|)))) (forall ((|aux_div_ULTIMATE.start_main_~index~0#1_49| Int) (|aux_mod_ULTIMATE.start_main_~index~0#1_49| Int) (v_ArrVal_63 Int)) (let ((.cse11 (+ |aux_mod_ULTIMATE.start_main_~index~0#1_49| (* 4294967296 |aux_div_ULTIMATE.start_main_~index~0#1_49|)))) (or (< .cse11 0) (< |aux_mod_ULTIMATE.start_main_~index~0#1_49| 0) (<= c_~ARR_SIZE~0 .cse11) (and (forall ((|ULTIMATE.start_main_~num~0#1| Int)) (let ((.cse12 (mod (* |ULTIMATE.start_main_~num~0#1| (* |ULTIMATE.start_main_~num~0#1| (* |ULTIMATE.start_main_~num~0#1| (* |ULTIMATE.start_main_~num~0#1| (+ (* |aux_div_ULTIMATE.start_main_~index~0#1_49| 4294967296) |aux_mod_ULTIMATE.start_main_~index~0#1_49|))))) 4294967296))) (or (< 2147483647 .cse12) (< .cse12 v_ArrVal_63)))) (forall ((|ULTIMATE.start_main_~num~0#1| Int)) (let ((.cse13 (mod (* |ULTIMATE.start_main_~num~0#1| (* |ULTIMATE.start_main_~num~0#1| (* |ULTIMATE.start_main_~num~0#1| (* |ULTIMATE.start_main_~num~0#1| (+ (* |aux_div_ULTIMATE.start_main_~index~0#1_49| 4294967296) |aux_mod_ULTIMATE.start_main_~index~0#1_49|))))) 4294967296))) (or (< .cse13 (+ 4294967296 v_ArrVal_63)) (<= .cse13 2147483647))))) (< 2147483647 |aux_mod_ULTIMATE.start_main_~index~0#1_49|) (let ((.cse21 (* (mod |aux_mod_ULTIMATE.start_main_~index~0#1_49| 4294967296) 4))) (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse21) v_ArrVal_63)))) (let ((.cse16 (select .cse15 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse17 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse21))) (let ((.cse19 (div (+ (- 1) c_~ARR_SIZE~0 (* c_~ARR_SIZE~0 c_~ARR_SIZE~0)) 4)) (.cse18 (mod (select .cse16 .cse17) 4294967296))) (and (<= (let ((.cse14 (store .cse16 .cse17 (+ .cse18 (- 4294967296))))) (+ (select .cse14 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select (select (store .cse15 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse14) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|)) .cse19) (or (<= (let ((.cse20 (store .cse16 .cse17 .cse18))) (+ (select (select (store .cse15 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse20) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse20 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|)) .cse19) (< 2147483647 .cse18))))))))))) is different from true [2021-12-06 18:12:40,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:12:40,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721774780] [2021-12-06 18:12:40,332 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:12:40,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517255013] [2021-12-06 18:12:40,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517255013] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:12:40,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:12:40,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-12-06 18:12:40,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475883649] [2021-12-06 18:12:40,333 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 18:12:40,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 18:12:40,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:12:40,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 18:12:40,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=355, Unknown=16, NotChecked=40, Total=506 [2021-12-06 18:12:40,336 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:12:42,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:12:42,403 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-12-06 18:12:42,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 18:12:42,403 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-12-06 18:12:42,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:12:42,404 INFO L225 Difference]: With dead ends: 53 [2021-12-06 18:12:42,404 INFO L226 Difference]: Without dead ends: 49 [2021-12-06 18:12:42,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=105, Invalid=388, Unknown=17, NotChecked=42, Total=552 [2021-12-06 18:12:42,407 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:12:42,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 109 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 51 Unchecked, 0.0s Time] [2021-12-06 18:12:42,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-06 18:12:42,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2021-12-06 18:12:42,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:12:42,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-12-06 18:12:42,415 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 28 [2021-12-06 18:12:42,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:12:42,416 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-12-06 18:12:42,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:12:42,416 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-12-06 18:12:42,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 18:12:42,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:12:42,417 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 18:12:42,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-06 18:12:42,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:42,619 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:12:42,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:42,622 INFO L85 PathProgramCache]: Analyzing trace with hash -367517255, now seen corresponding path program 1 times [2021-12-06 18:12:42,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:42,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754089036] [2021-12-06 18:12:42,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:42,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:42,650 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:12:42,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499530908] [2021-12-06 18:12:42,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:42,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:42,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:12:42,651 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:12:42,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:12:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:42,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 18:12:42,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:12:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:12:42,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:12:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:12:42,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:12:42,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754089036] [2021-12-06 18:12:42,843 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:12:42,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499530908] [2021-12-06 18:12:42,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499530908] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:12:42,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:12:42,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-12-06 18:12:42,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634646032] [2021-12-06 18:12:42,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:12:42,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 18:12:42,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:12:42,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 18:12:42,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:12:42,845 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:12:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:12:42,969 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2021-12-06 18:12:42,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 18:12:42,969 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-12-06 18:12:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:12:42,970 INFO L225 Difference]: With dead ends: 107 [2021-12-06 18:12:42,970 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 18:12:42,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:12:42,972 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 82 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:12:42,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 95 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:12:42,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 18:12:42,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 54. [2021-12-06 18:12:42,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:12:42,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-12-06 18:12:42,980 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 28 [2021-12-06 18:12:42,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:12:42,980 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-12-06 18:12:42,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:12:42,980 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-12-06 18:12:42,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 18:12:42,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:12:42,981 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:12:43,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:12:43,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-06 18:12:43,183 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:12:43,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:43,184 INFO L85 PathProgramCache]: Analyzing trace with hash -685364711, now seen corresponding path program 2 times [2021-12-06 18:12:43,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:43,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992431943] [2021-12-06 18:12:43,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:43,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:43,232 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:12:43,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694202934] [2021-12-06 18:12:43,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:12:43,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:43,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:12:43,234 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:12:43,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:12:43,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:12:43,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:12:43,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 18:12:43,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:12:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:12:43,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:12:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:12:43,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:12:43,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992431943] [2021-12-06 18:12:43,353 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:12:43,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694202934] [2021-12-06 18:12:43,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694202934] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:12:43,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:12:43,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-06 18:12:43,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189041028] [2021-12-06 18:12:43,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:12:43,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:12:43,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:12:43,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:12:43,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:12:43,354 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:12:43,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:12:43,410 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2021-12-06 18:12:43,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:12:43,410 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-12-06 18:12:43,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:12:43,411 INFO L225 Difference]: With dead ends: 77 [2021-12-06 18:12:43,411 INFO L226 Difference]: Without dead ends: 67 [2021-12-06 18:12:43,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:12:43,412 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:12:43,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 107 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:12:43,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-06 18:12:43,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2021-12-06 18:12:43,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 46 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:12:43,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2021-12-06 18:12:43,421 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 30 [2021-12-06 18:12:43,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:12:43,422 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2021-12-06 18:12:43,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:12:43,422 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2021-12-06 18:12:43,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 18:12:43,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:12:43,423 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:12:43,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:12:43,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:43,625 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:12:43,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:43,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1406627783, now seen corresponding path program 3 times [2021-12-06 18:12:43,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:43,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625821039] [2021-12-06 18:12:43,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:43,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:43,675 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:12:43,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731452934] [2021-12-06 18:12:43,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:12:43,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:43,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:12:43,676 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:12:43,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:12:43,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 18:12:43,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:12:43,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 18:12:43,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:12:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:12:43,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:12:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:12:43,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:12:43,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625821039] [2021-12-06 18:12:43,816 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:12:43,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731452934] [2021-12-06 18:12:43,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731452934] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:12:43,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:12:43,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-06 18:12:43,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232595226] [2021-12-06 18:12:43,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:12:43,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:12:43,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:12:43,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:12:43,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:12:43,818 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:12:43,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:12:43,885 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2021-12-06 18:12:43,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:12:43,885 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-12-06 18:12:43,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:12:43,886 INFO L225 Difference]: With dead ends: 66 [2021-12-06 18:12:43,886 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 18:12:43,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:12:43,888 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 53 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:12:43,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 114 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:12:43,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 18:12:43,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2021-12-06 18:12:43,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.125) internal successors, (54), 48 states have internal predecessors, (54), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:12:43,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2021-12-06 18:12:43,896 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 30 [2021-12-06 18:12:43,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:12:43,897 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2021-12-06 18:12:43,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:12:43,897 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2021-12-06 18:12:43,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 18:12:43,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:12:43,898 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:12:43,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:12:44,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:44,100 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:12:44,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:44,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1198632411, now seen corresponding path program 4 times [2021-12-06 18:12:44,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:44,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294462581] [2021-12-06 18:12:44,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:44,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:44,156 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:12:44,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16776597] [2021-12-06 18:12:44,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:12:44,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:44,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:12:44,158 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:12:44,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dd7a82d-fb6b-4ad7-9bb5-4e1f31f89055/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:12:44,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:12:44,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:12:44,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-06 18:12:44,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:12:44,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 18:12:44,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:44,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-06 18:12:44,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-06 18:12:44,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-06 18:12:44,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-06 18:12:44,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:44,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:44,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-12-06 18:12:44,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2021-12-06 18:12:44,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:44,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:44,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:44,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:44,775 INFO L354 Elim1Store]: treesize reduction 42, result has 40.8 percent of original size [2021-12-06 18:12:44,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 93 [2021-12-06 18:12:44,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:44,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:44,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:44,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 18 [2021-12-06 18:12:46,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 147 [2021-12-06 18:12:46,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:46,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:46,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:46,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:46,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:46,261 INFO L354 Elim1Store]: treesize reduction 41, result has 10.9 percent of original size [2021-12-06 18:12:46,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 113 [2021-12-06 18:12:46,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:46,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:46,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:46,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:46,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:46,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:12:46,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 63 [2021-12-06 18:13:02,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:13:02,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:13:02,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:13:02,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 192 treesize of output 108 [2021-12-06 18:13:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:13:02,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:18:13,306 WARN L227 SmtUtils]: Spent 13.80s on a formula simplification that was a NOOP. DAG size: 25 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:18:55,548 WARN L227 SmtUtils]: Spent 14.21s on a formula simplification that was a NOOP. DAG size: 7 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)