./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/modn.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_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/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_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/modn.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/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_80ebe093-7a48-4932-bc79-af250927fe54/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 b1b107a3e17c36933ddc5a5cff6ab95f9f0d71df794eec32ec4a28d109efd829 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:34:11,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:34:11,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:34:11,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:34:11,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:34:11,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:34:11,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:34:11,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:34:11,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:34:11,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:34:11,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:34:11,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:34:11,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:34:11,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:34:11,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:34:11,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:34:11,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:34:11,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:34:11,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:34:11,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:34:11,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:34:11,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:34:11,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:34:11,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:34:11,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:34:11,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:34:11,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:34:11,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:34:11,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:34:11,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:34:11,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:34:11,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:34:11,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:34:11,666 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:34:11,667 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:34:11,667 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:34:11,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:34:11,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:34:11,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:34:11,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:34:11,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:34:11,669 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:34:11,691 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:34:11,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:34:11,691 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:34:11,691 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:34:11,692 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:34:11,692 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:34:11,693 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:34:11,693 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:34:11,693 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:34:11,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:34:11,694 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:34:11,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:34:11,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:34:11,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:34:11,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:34:11,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:34:11,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:34:11,695 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:34:11,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:34:11,695 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:34:11,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:34:11,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:34:11,696 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:34:11,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:34:11,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:34:11,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:34:11,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:34:11,697 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:34:11,697 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:34:11,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:34:11,697 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:34:11,697 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:34:11,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:34:11,698 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:34:11,698 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_80ebe093-7a48-4932-bc79-af250927fe54/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1b107a3e17c36933ddc5a5cff6ab95f9f0d71df794eec32ec4a28d109efd829 [2021-12-06 20:34:11,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:34:11,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:34:11,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:34:11,888 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:34:11,889 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:34:11,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-fpi/modn.c [2021-12-06 20:34:11,928 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/data/7eedec718/1a09e5c459874af6931b83cefa046a2d/FLAG2c51d9c2d [2021-12-06 20:34:12,296 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:34:12,296 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/sv-benchmarks/c/array-fpi/modn.c [2021-12-06 20:34:12,302 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/data/7eedec718/1a09e5c459874af6931b83cefa046a2d/FLAG2c51d9c2d [2021-12-06 20:34:12,315 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/data/7eedec718/1a09e5c459874af6931b83cefa046a2d [2021-12-06 20:34:12,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:34:12,319 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:34:12,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:34:12,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:34:12,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:34:12,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:34:12" (1/1) ... [2021-12-06 20:34:12,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@413445a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:34:12, skipping insertion in model container [2021-12-06 20:34:12,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:34:12" (1/1) ... [2021-12-06 20:34:12,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:34:12,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:34:12,506 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_80ebe093-7a48-4932-bc79-af250927fe54/sv-benchmarks/c/array-fpi/modn.c[587,600] [2021-12-06 20:34:12,519 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:34:12,525 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:34:12,535 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_80ebe093-7a48-4932-bc79-af250927fe54/sv-benchmarks/c/array-fpi/modn.c[587,600] [2021-12-06 20:34:12,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:34:12,551 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:34:12,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:34:12 WrapperNode [2021-12-06 20:34:12,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:34:12,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:34:12,553 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:34:12,553 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:34:12,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:34:12" (1/1) ... [2021-12-06 20:34:12,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:34:12" (1/1) ... [2021-12-06 20:34:12,579 INFO L137 Inliner]: procedures = 17, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2021-12-06 20:34:12,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:34:12,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:34:12,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:34:12,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:34:12,587 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:34:12" (1/1) ... [2021-12-06 20:34:12,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:34:12" (1/1) ... [2021-12-06 20:34:12,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:34:12" (1/1) ... [2021-12-06 20:34:12,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:34:12" (1/1) ... [2021-12-06 20:34:12,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:34:12" (1/1) ... [2021-12-06 20:34:12,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:34:12" (1/1) ... [2021-12-06 20:34:12,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:34:12" (1/1) ... [2021-12-06 20:34:12,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:34:12,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:34:12,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:34:12,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:34:12,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:34:12" (1/1) ... [2021-12-06 20:34:12,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:34:12,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:34:12,628 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:34:12,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:34:12,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:34:12,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:34:12,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 20:34:12,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 20:34:12,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 20:34:12,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:34:12,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:34:12,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 20:34:12,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 20:34:12,729 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:34:12,730 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:34:12,833 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:34:12,838 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:34:12,838 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 20:34:12,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:34:12 BoogieIcfgContainer [2021-12-06 20:34:12,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:34:12,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:34:12,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:34:12,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:34:12,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:34:12" (1/3) ... [2021-12-06 20:34:12,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9fa21eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:34:12, skipping insertion in model container [2021-12-06 20:34:12,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:34:12" (2/3) ... [2021-12-06 20:34:12,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9fa21eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:34:12, skipping insertion in model container [2021-12-06 20:34:12,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:34:12" (3/3) ... [2021-12-06 20:34:12,846 INFO L111 eAbstractionObserver]: Analyzing ICFG modn.c [2021-12-06 20:34:12,850 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:34:12,850 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 20:34:12,893 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:34:12,902 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 20:34:12,902 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 20:34:12,916 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:34:12,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 20:34:12,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:34:12,922 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:34:12,923 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:34:12,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:34:12,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-12-06 20:34:12,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:34:12,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515686475] [2021-12-06 20:34:12,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:34:12,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:34:13,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:34:13,075 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 20:34:13,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:34:13,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515686475] [2021-12-06 20:34:13,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515686475] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:34:13,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:34:13,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:34:13,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327740127] [2021-12-06 20:34:13,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:34:13,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 20:34:13,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:34:13,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 20:34:13,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:34:13,126 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:34:13,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:34:13,141 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-12-06 20:34:13,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 20:34:13,143 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 20:34:13,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:34:13,150 INFO L225 Difference]: With dead ends: 38 [2021-12-06 20:34:13,150 INFO L226 Difference]: Without dead ends: 17 [2021-12-06 20:34:13,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:34:13,155 INFO L933 BasicCegarLoop]: 24 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, 24 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 20:34:13,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:34:13,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-06 20:34:13,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-06 20:34:13,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:34:13,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-12-06 20:34:13,178 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-12-06 20:34:13,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:34:13,178 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-12-06 20:34:13,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:34:13,178 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-12-06 20:34:13,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 20:34:13,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:34:13,179 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:34:13,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:34:13,179 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:34:13,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:34:13,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-12-06 20:34:13,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:34:13,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262059787] [2021-12-06 20:34:13,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:34:13,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:34:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:34:13,241 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 20:34:13,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:34:13,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262059787] [2021-12-06 20:34:13,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262059787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:34:13,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:34:13,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:34:13,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735899735] [2021-12-06 20:34:13,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:34:13,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:34:13,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:34:13,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:34:13,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:34:13,243 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:34:13,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:34:13,285 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-12-06 20:34:13,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:34:13,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 20:34:13,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:34:13,287 INFO L225 Difference]: With dead ends: 37 [2021-12-06 20:34:13,287 INFO L226 Difference]: Without dead ends: 27 [2021-12-06 20:34:13,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:34:13,289 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:34:13,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 15 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:34:13,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-06 20:34:13,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-12-06 20:34:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:34:13,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-12-06 20:34:13,296 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-12-06 20:34:13,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:34:13,296 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-12-06 20:34:13,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:34:13,297 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-12-06 20:34:13,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 20:34:13,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:34:13,297 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:34:13,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 20:34:13,298 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:34:13,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:34:13,299 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-12-06 20:34:13,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:34:13,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212200880] [2021-12-06 20:34:13,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:34:13,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:34:13,325 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:34:13,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981357026] [2021-12-06 20:34:13,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:34:13,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:34:13,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:34:13,327 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:34:13,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:34:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:34:13,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 20:34:13,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:34:13,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 20:34:13,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 20:34:13,599 INFO L354 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2021-12-06 20:34:13,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 28 [2021-12-06 20:34:13,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-12-06 20:34:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:34:13,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:34:42,604 WARN L227 SmtUtils]: Spent 26.17s on a formula simplification. DAG size of input: 46 DAG size of output: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:34:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:34:58,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:34:58,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212200880] [2021-12-06 20:34:58,684 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:34:58,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981357026] [2021-12-06 20:34:58,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981357026] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:34:58,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:34:58,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-12-06 20:34:58,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995755345] [2021-12-06 20:34:58,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:34:58,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 20:34:58,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:34:58,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 20:34:58,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=259, Unknown=8, NotChecked=0, Total=342 [2021-12-06 20:34:58,687 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:34:59,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:34:59,629 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-12-06 20:34:59,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 20:34:59,630 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 20:34:59,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:34:59,631 INFO L225 Difference]: With dead ends: 35 [2021-12-06 20:34:59,631 INFO L226 Difference]: Without dead ends: 33 [2021-12-06 20:34:59,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=136, Invalid=408, Unknown=8, NotChecked=0, Total=552 [2021-12-06 20:34:59,633 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:34:59,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 71 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 77 Invalid, 0 Unknown, 55 Unchecked, 0.4s Time] [2021-12-06 20:34:59,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-06 20:34:59,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-12-06 20:34:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:34:59,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-06 20:34:59,639 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2021-12-06 20:34:59,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:34:59,639 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-06 20:34:59,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:34:59,640 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-06 20:34:59,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 20:34:59,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:34:59,641 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:34:59,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:34:59,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:34:59,842 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:34:59,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:34:59,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1267903976, now seen corresponding path program 2 times [2021-12-06 20:34:59,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:34:59,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476259976] [2021-12-06 20:34:59,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:34:59,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:34:59,856 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:34:59,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646612797] [2021-12-06 20:34:59,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:34:59,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:34:59,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:34:59,857 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:34:59,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 20:34:59,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:34:59,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:34:59,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 20:34:59,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:35:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:35:00,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:35:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:35:00,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:35:00,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476259976] [2021-12-06 20:35:00,325 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:35:00,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646612797] [2021-12-06 20:35:00,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646612797] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:35:00,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:35:00,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-06 20:35:00,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154753007] [2021-12-06 20:35:00,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:35:00,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 20:35:00,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:35:00,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 20:35:00,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-06 20:35:00,327 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:35:00,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:35:00,867 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-12-06 20:35:00,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 20:35:00,868 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 20:35:00,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:35:00,869 INFO L225 Difference]: With dead ends: 61 [2021-12-06 20:35:00,869 INFO L226 Difference]: Without dead ends: 42 [2021-12-06 20:35:00,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:35:00,870 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 44 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:35:00,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 47 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:35:00,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-06 20:35:00,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 26. [2021-12-06 20:35:00,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:35:00,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-12-06 20:35:00,876 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2021-12-06 20:35:00,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:35:00,876 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-12-06 20:35:00,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:35:00,876 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-12-06 20:35:00,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 20:35:00,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:35:00,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:35:00,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 20:35:01,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:35:01,079 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:35:01,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:35:01,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1174519208, now seen corresponding path program 3 times [2021-12-06 20:35:01,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:35:01,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042304211] [2021-12-06 20:35:01,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:35:01,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:35:01,108 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:35:01,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592324675] [2021-12-06 20:35:01,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:35:01,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:35:01,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:35:01,110 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:35:01,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 20:35:01,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 20:35:01,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:35:01,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 20:35:01,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:35:01,555 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 20:35:01,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 82 [2021-12-06 20:35:02,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-12-06 20:35:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:35:03,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:35:03,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:35:03,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 124 [2021-12-06 20:35:03,532 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 23 treesize of output 17 [2021-12-06 20:35:03,611 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 23 treesize of output 17 [2021-12-06 20:35:03,654 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 23 treesize of output 17 [2021-12-06 20:35:03,733 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 23 treesize of output 17 [2021-12-06 20:35:03,787 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 26 treesize of output 24 [2021-12-06 20:35:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:35:06,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:35:06,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042304211] [2021-12-06 20:35:06,124 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:35:06,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592324675] [2021-12-06 20:35:06,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592324675] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:35:06,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:35:06,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-12-06 20:35:06,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883341212] [2021-12-06 20:35:06,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:35:06,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 20:35:06,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:35:06,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 20:35:06,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-12-06 20:35:06,126 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:35:06,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:35:06,296 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-12-06 20:35:06,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 20:35:06,297 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 20:35:06,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:35:06,298 INFO L225 Difference]: With dead ends: 28 [2021-12-06 20:35:06,298 INFO L226 Difference]: Without dead ends: 23 [2021-12-06 20:35:06,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-12-06 20:35:06,300 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:35:06,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 63 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2021-12-06 20:35:06,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-06 20:35:06,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-06 20:35:06,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:35:06,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-12-06 20:35:06,304 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2021-12-06 20:35:06,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:35:06,304 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-12-06 20:35:06,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:35:06,304 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-12-06 20:35:06,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 20:35:06,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:35:06,305 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:35:06,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 20:35:06,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:35:06,507 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:35:06,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:35:06,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 4 times [2021-12-06 20:35:06,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:35:06,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17277581] [2021-12-06 20:35:06,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:35:06,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:35:06,531 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:35:06,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20823260] [2021-12-06 20:35:06,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:35:06,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:35:06,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:35:06,533 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:35:06,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 20:35:06,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:35:06,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:35:06,572 WARN L261 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 20:35:06,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:35:06,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 20:35:06,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 20:35:06,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 20:35:07,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:35:07,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-12-06 20:35:08,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:35:08,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:35:08,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-12-06 20:35:09,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:35:09,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-12-06 20:35:09,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:35:09,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:35:12,000 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_44| Int)) (or (forall ((v_ArrVal_135 Int)) (= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_44| 4)) v_ArrVal_135) |c_ULTIMATE.start_main_~a~0#1.offset|))) (< |v_ULTIMATE.start_main_~i~0#1_44| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 20:35:38,911 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_44| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_44| 1) (let ((.cse0 (and (let ((.cse1 (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1))) (or (= (mod .cse1 ~N~0) 0) (<= 0 .cse1))) (forall ((v_ArrVal_135 Int)) (= (select (store (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (+ (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1))) (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse3)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (mod .cse3 ~N~0)))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_44| 4)) v_ArrVal_135) |c_ULTIMATE.start_main_~a~0#1.offset|) 0))))) (and (or .cse0 (< ~N~0 0)) (or (<= 0 ~N~0) .cse0))))) (<= ~N~0 |c_ULTIMATE.start_main_~i~0#1|) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0))) is different from false [2021-12-06 20:36:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-06 20:36:03,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:36:03,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17277581] [2021-12-06 20:36:03,786 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:36:03,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20823260] [2021-12-06 20:36:03,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20823260] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:36:03,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:36:03,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-12-06 20:36:03,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082043924] [2021-12-06 20:36:03,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:36:03,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 20:36:03,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:36:03,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 20:36:03,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=378, Unknown=17, NotChecked=82, Total=552 [2021-12-06 20:36:03,787 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:10,387 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |c_ULTIMATE.start_main_~i~0#1| 0) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (~N~0 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse0 (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))) (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4))) (mod .cse0 ~N~0)) (< (+ |c_ULTIMATE.start_main_~a~0#1.base| 1) |ULTIMATE.start_main_~#sum~0#1.base|) (= 2 .cse0) (< 1 ~N~0) (<= ~N~0 2)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_44| Int)) (or (forall ((v_ArrVal_135 Int)) (= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_44| 4)) v_ArrVal_135) |c_ULTIMATE.start_main_~a~0#1.offset|))) (< |v_ULTIMATE.start_main_~i~0#1_44| (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-12-06 20:36:12,396 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (~N~0 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse0 (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))) (and (< (+ |c_ULTIMATE.start_main_~a~0#1.base| 1) |ULTIMATE.start_main_~#sum~0#1.base|) (= 2 .cse0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (mod .cse0 ~N~0)) (< 1 ~N~0) (<= ~N~0 2)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_44| Int)) (or (forall ((v_ArrVal_135 Int)) (= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_44| 4)) v_ArrVal_135) |c_ULTIMATE.start_main_~a~0#1.offset|))) (< |v_ULTIMATE.start_main_~i~0#1_44| (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-12-06 20:36:12,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:36:12,770 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-12-06 20:36:12,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 20:36:12,771 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 20:36:12,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:36:12,772 INFO L225 Difference]: With dead ends: 49 [2021-12-06 20:36:12,772 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 20:36:12,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 55.9s TimeCoverageRelationStatistics Valid=90, Invalid=458, Unknown=20, NotChecked=188, Total=756 [2021-12-06 20:36:12,774 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:36:12,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 88 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 120 Unchecked, 0.3s Time] [2021-12-06 20:36:12,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 20:36:12,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2021-12-06 20:36:12,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:12,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-12-06 20:36:12,781 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 20 [2021-12-06 20:36:12,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:36:12,781 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-12-06 20:36:12,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:12,782 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-12-06 20:36:12,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 20:36:12,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:36:12,783 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:36:12,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 20:36:12,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 20:36:12,985 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:36:12,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:36:12,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1232945932, now seen corresponding path program 1 times [2021-12-06 20:36:12,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:36:12,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167390362] [2021-12-06 20:36:12,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:36:12,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:36:13,013 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:36:13,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672634562] [2021-12-06 20:36:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:36:13,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:36:13,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:36:13,014 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:36:13,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 20:36:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:36:13,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 20:36:13,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:36:13,077 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 20:36:13,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 20:36:13,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 20:36:13,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 20:36:13,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 41 [2021-12-06 20:36:13,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:36:13,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 51 [2021-12-06 20:36:17,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 33 [2021-12-06 20:36:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:36:17,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:36:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:36:37,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:36:37,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167390362] [2021-12-06 20:36:37,261 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:36:37,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672634562] [2021-12-06 20:36:37,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672634562] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:36:37,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:36:37,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-12-06 20:36:37,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243916216] [2021-12-06 20:36:37,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:36:37,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 20:36:37,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:36:37,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 20:36:37,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=486, Unknown=5, NotChecked=0, Total=600 [2021-12-06 20:36:37,263 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:38,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:36:38,968 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2021-12-06 20:36:38,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 20:36:38,970 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 20:36:38,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:36:38,971 INFO L225 Difference]: With dead ends: 71 [2021-12-06 20:36:38,971 INFO L226 Difference]: Without dead ends: 69 [2021-12-06 20:36:38,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=138, Invalid=613, Unknown=5, NotChecked=0, Total=756 [2021-12-06 20:36:38,972 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:36:38,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 132 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 143 Invalid, 0 Unknown, 84 Unchecked, 0.8s Time] [2021-12-06 20:36:38,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-06 20:36:38,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2021-12-06 20:36:38,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:38,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2021-12-06 20:36:38,981 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 24 [2021-12-06 20:36:38,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:36:38,981 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2021-12-06 20:36:38,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:38,981 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2021-12-06 20:36:38,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 20:36:38,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:36:38,982 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:36:39,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 20:36:39,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:36:39,184 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:36:39,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:36:39,185 INFO L85 PathProgramCache]: Analyzing trace with hash -900609774, now seen corresponding path program 5 times [2021-12-06 20:36:39,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:36:39,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617950629] [2021-12-06 20:36:39,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:36:39,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:36:39,204 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:36:39,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65800692] [2021-12-06 20:36:39,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:36:39,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:36:39,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:36:39,205 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:36:39,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 20:36:39,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-06 20:36:39,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:36:39,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 20:36:39,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:36:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:36:39,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:36:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:36:40,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:36:40,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617950629] [2021-12-06 20:36:40,471 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:36:40,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65800692] [2021-12-06 20:36:40,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65800692] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:36:40,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:36:40,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-12-06 20:36:40,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585292330] [2021-12-06 20:36:40,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:36:40,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 20:36:40,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:36:40,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 20:36:40,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-12-06 20:36:40,473 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:41,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:36:41,981 INFO L93 Difference]: Finished difference Result 123 states and 134 transitions. [2021-12-06 20:36:41,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 20:36:41,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 20:36:41,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:36:41,983 INFO L225 Difference]: With dead ends: 123 [2021-12-06 20:36:41,983 INFO L226 Difference]: Without dead ends: 85 [2021-12-06 20:36:41,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-12-06 20:36:41,984 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 158 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:36:41,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 91 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 20:36:41,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-06 20:36:41,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 51. [2021-12-06 20:36:41,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.14) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:41,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-12-06 20:36:41,992 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 24 [2021-12-06 20:36:41,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:36:41,993 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-12-06 20:36:41,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:41,993 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-12-06 20:36:41,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 20:36:41,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:36:41,994 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:36:42,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 20:36:42,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 20:36:42,195 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:36:42,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:36:42,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 6 times [2021-12-06 20:36:42,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:36:42,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551011127] [2021-12-06 20:36:42,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:36:42,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:36:42,215 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:36:42,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843920325] [2021-12-06 20:36:42,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:36:42,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:36:42,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:36:42,216 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:36:42,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 20:36:42,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-06 20:36:42,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:36:42,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 20:36:42,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:36:42,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 20:36:42,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 20:36:43,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 20:36:43,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 20:36:44,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:36:44,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-12-06 20:36:44,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:36:45,024 INFO L354 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2021-12-06 20:36:45,024 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 1 case distinctions, treesize of input 32 treesize of output 40 [2021-12-06 20:36:45,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:36:45,828 INFO L354 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2021-12-06 20:36:45,828 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 1 case distinctions, treesize of input 38 treesize of output 46 [2021-12-06 20:36:47,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:36:47,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-12-06 20:36:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:36:47,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:36:50,576 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (forall ((v_ArrVal_267 Int) (v_ArrVal_265 Int)) (= (select (let ((.cse0 (* |ULTIMATE.start_main_~i~0#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse0) v_ArrVal_265) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse0 4) v_ArrVal_267)) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (< (+ 2 |ULTIMATE.start_main_~i~0#1|) c_~N~0) (<= c_~N~0 (+ |ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 20:36:53,585 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_82| Int)) (or (let ((.cse5 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse2 (= (mod .cse5 c_~N~0) 0))) (let ((.cse0 (or (forall ((v_ArrVal_267 Int) (v_ArrVal_265 Int)) (= (select (let ((.cse6 (* |v_ULTIMATE.start_main_~i~0#1_82| 4))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (mod (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) c_~N~0)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6) v_ArrVal_265) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6 4) v_ArrVal_267)) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (and (< .cse5 0) (not .cse2)))) (.cse3 (<= 0 .cse5))) (and (or (<= 0 c_~N~0) (and .cse0 (or (forall ((v_ArrVal_267 Int) (v_ArrVal_265 Int)) (= (select (let ((.cse1 (* |v_ULTIMATE.start_main_~i~0#1_82| 4))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (+ (mod (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) c_~N~0) c_~N~0)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1) v_ArrVal_265) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1 4) v_ArrVal_267)) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) .cse2 .cse3))) (or (and .cse0 (or .cse2 (forall ((v_ArrVal_267 Int) (v_ArrVal_265 Int)) (= (select (let ((.cse4 (* |v_ULTIMATE.start_main_~i~0#1_82| 4))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (+ (mod (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) c_~N~0) (* c_~N~0 (- 1)))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse4) v_ArrVal_265) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse4 4) v_ArrVal_267)) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) .cse3)) (< c_~N~0 0)))))) (<= c_~N~0 (+ |v_ULTIMATE.start_main_~i~0#1_82| 1)) (< (+ |v_ULTIMATE.start_main_~i~0#1_82| 2) c_~N~0))) is different from false [2021-12-06 20:37:06,141 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 20:37:06,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 1 [2021-12-06 20:37:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-12-06 20:37:06,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:37:06,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551011127] [2021-12-06 20:37:06,150 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:37:06,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843920325] [2021-12-06 20:37:06,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843920325] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:37:06,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:37:06,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 37 [2021-12-06 20:37:06,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836343567] [2021-12-06 20:37:06,150 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:37:06,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 20:37:06,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:37:06,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 20:37:06,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1019, Unknown=3, NotChecked=134, Total=1332 [2021-12-06 20:37:06,152 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:37:14,274 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) (mod 3 c_~N~0)) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int)) (and (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) 0) 3) (< (+ |c_ULTIMATE.start_main_~a~0#1.base| 1) |ULTIMATE.start_main_~#sum~0#1.base|))) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4))) 0) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (forall ((v_ArrVal_267 Int) (v_ArrVal_265 Int)) (= (select (let ((.cse1 (* |ULTIMATE.start_main_~i~0#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1) v_ArrVal_265) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1 4) v_ArrVal_267)) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (< (+ 2 |ULTIMATE.start_main_~i~0#1|) c_~N~0) (<= c_~N~0 (+ |ULTIMATE.start_main_~i~0#1| 1)))) (<= c_~N~0 3) (< 2 c_~N~0))) is different from false [2021-12-06 20:37:16,283 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (mod 3 c_~N~0)) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int)) (and (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) 0) 3) (< (+ |c_ULTIMATE.start_main_~a~0#1.base| 1) |ULTIMATE.start_main_~#sum~0#1.base|))) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (forall ((v_ArrVal_267 Int) (v_ArrVal_265 Int)) (= (select (let ((.cse0 (* |ULTIMATE.start_main_~i~0#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse0) v_ArrVal_265) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse0 4) v_ArrVal_267)) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (< (+ 2 |ULTIMATE.start_main_~i~0#1|) c_~N~0) (<= c_~N~0 (+ |ULTIMATE.start_main_~i~0#1| 1)))) (<= c_~N~0 3) (< 2 c_~N~0)) is different from false [2021-12-06 20:37:16,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:37:16,345 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2021-12-06 20:37:16,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 20:37:16,345 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 20:37:16,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:37:16,346 INFO L225 Difference]: With dead ends: 73 [2021-12-06 20:37:16,346 INFO L226 Difference]: Without dead ends: 71 [2021-12-06 20:37:16,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=202, Invalid=1214, Unknown=6, NotChecked=300, Total=1722 [2021-12-06 20:37:16,347 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 5 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:37:16,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 119 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 134 Unchecked, 0.2s Time] [2021-12-06 20:37:16,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-06 20:37:16,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2021-12-06 20:37:16,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 65 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:37:16,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-12-06 20:37:16,356 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 24 [2021-12-06 20:37:16,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:37:16,357 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-12-06 20:37:16,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:37:16,357 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-12-06 20:37:16,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 20:37:16,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:37:16,358 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:37:16,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 20:37:16,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:37:16,558 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:37:16,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:37:16,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1501136494, now seen corresponding path program 7 times [2021-12-06 20:37:16,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:37:16,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234730891] [2021-12-06 20:37:16,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:37:16,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:37:16,570 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:37:16,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763187770] [2021-12-06 20:37:16,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:37:16,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:37:16,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:37:16,571 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:37:16,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 20:37:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:37:16,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 20:37:16,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:37:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:37:17,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:37:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:37:17,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:37:17,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234730891] [2021-12-06 20:37:17,667 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:37:17,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763187770] [2021-12-06 20:37:17,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763187770] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:37:17,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:37:17,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-12-06 20:37:17,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590617354] [2021-12-06 20:37:17,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:37:17,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 20:37:17,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:37:17,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 20:37:17,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-12-06 20:37:17,669 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:37:19,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:37:19,493 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2021-12-06 20:37:19,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 20:37:19,494 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 20:37:19,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:37:19,494 INFO L225 Difference]: With dead ends: 100 [2021-12-06 20:37:19,495 INFO L226 Difference]: Without dead ends: 83 [2021-12-06 20:37:19,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-12-06 20:37:19,496 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 155 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:37:19,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 101 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 20:37:19,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-06 20:37:19,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 50. [2021-12-06 20:37:19,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:37:19,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-12-06 20:37:19,504 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 24 [2021-12-06 20:37:19,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:37:19,505 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-12-06 20:37:19,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:37:19,505 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-12-06 20:37:19,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 20:37:19,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:37:19,506 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:37:19,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 20:37:19,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 20:37:19,708 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:37:19,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:37:19,709 INFO L85 PathProgramCache]: Analyzing trace with hash 778799246, now seen corresponding path program 8 times [2021-12-06 20:37:19,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:37:19,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318452881] [2021-12-06 20:37:19,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:37:19,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:37:19,725 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:37:19,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822127645] [2021-12-06 20:37:19,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:37:19,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:37:19,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:37:19,726 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:37:19,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 20:37:19,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:37:19,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:37:19,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-06 20:37:19,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:37:19,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 20:37:20,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 20:37:20,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 20:37:20,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 20:37:21,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 20:37:21,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:37:21,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-12-06 20:37:22,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:37:22,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:37:22,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-12-06 20:37:22,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:37:22,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:37:22,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-12-06 20:37:23,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:37:23,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:37:23,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-12-06 20:37:23,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:37:23,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-12-06 20:37:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:37:24,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:37:26,702 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_111| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_111| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_369 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_111| 4)) v_ArrVal_369) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))) is different from false [2021-12-06 20:37:29,128 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_112| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_112| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_368 Int) (|v_ULTIMATE.start_main_~i~0#1_111| Int) (v_ArrVal_369 Int)) (or (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_112| 4)) v_ArrVal_368) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_111| 4)) v_ArrVal_369) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< |v_ULTIMATE.start_main_~i~0#1_111| (+ |v_ULTIMATE.start_main_~i~0#1_112| 1)))))) is different from false [2021-12-06 20:37:31,213 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_368 Int) (v_ArrVal_366 Int) (|v_ULTIMATE.start_main_~i~0#1_112| Int) (|v_ULTIMATE.start_main_~i~0#1_111| Int) (v_ArrVal_369 Int)) (or (= (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) v_ArrVal_366) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_112| 4)) v_ArrVal_368) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_111| 4)) v_ArrVal_369) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< |v_ULTIMATE.start_main_~i~0#1_112| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (< |v_ULTIMATE.start_main_~i~0#1_111| (+ |v_ULTIMATE.start_main_~i~0#1_112| 1)))) is different from false [2021-12-06 20:37:33,471 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_113| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_113| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_368 Int) (v_ArrVal_366 Int) (|v_ULTIMATE.start_main_~i~0#1_112| Int) (|v_ULTIMATE.start_main_~i~0#1_111| Int) (v_ArrVal_369 Int)) (or (= (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_113| 4)) v_ArrVal_366) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_112| 4)) v_ArrVal_368) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_111| 4)) v_ArrVal_369) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< |v_ULTIMATE.start_main_~i~0#1_111| (+ |v_ULTIMATE.start_main_~i~0#1_112| 1)) (< |v_ULTIMATE.start_main_~i~0#1_112| (+ |v_ULTIMATE.start_main_~i~0#1_113| 1)))))) is different from false [2021-12-06 20:38:50,587 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 20:38:50,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-12-06 20:38:50,595 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2021-12-06 20:38:50,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:38:50,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318452881] [2021-12-06 20:38:50,596 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:38:50,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822127645] [2021-12-06 20:38:50,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822127645] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:38:50,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:38:50,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 39 [2021-12-06 20:38:50,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429501275] [2021-12-06 20:38:50,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:38:50,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 20:38:50,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:38:50,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 20:38:50,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1025, Unknown=8, NotChecked=276, Total=1482 [2021-12-06 20:38:50,598 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:39:30,679 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (and (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) 4) (< (+ |c_ULTIMATE.start_main_~a~0#1.base| 1) |ULTIMATE.start_main_~#sum~0#1.base|))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |c_ULTIMATE.start_main_~i~0#1| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_113| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_113| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_368 Int) (v_ArrVal_366 Int) (|v_ULTIMATE.start_main_~i~0#1_112| Int) (|v_ULTIMATE.start_main_~i~0#1_111| Int) (v_ArrVal_369 Int)) (or (= (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_113| 4)) v_ArrVal_366) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_112| 4)) v_ArrVal_368) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_111| 4)) v_ArrVal_369) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< |v_ULTIMATE.start_main_~i~0#1_111| (+ |v_ULTIMATE.start_main_~i~0#1_112| 1)) (< |v_ULTIMATE.start_main_~i~0#1_112| (+ |v_ULTIMATE.start_main_~i~0#1_113| 1)))))) (exists ((~N~0 Int)) (and (<= ~N~0 4) (< 3 ~N~0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4))) (mod 4 ~N~0))))) is different from false [2021-12-06 20:39:45,945 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_111| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_111| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_369 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_111| 4)) v_ArrVal_369) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_113| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_113| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_368 Int) (v_ArrVal_366 Int) (|v_ULTIMATE.start_main_~i~0#1_112| Int) (|v_ULTIMATE.start_main_~i~0#1_111| Int) (v_ArrVal_369 Int)) (or (= (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_113| 4)) v_ArrVal_366) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_112| 4)) v_ArrVal_368) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_111| 4)) v_ArrVal_369) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< |v_ULTIMATE.start_main_~i~0#1_111| (+ |v_ULTIMATE.start_main_~i~0#1_112| 1)) (< |v_ULTIMATE.start_main_~i~0#1_112| (+ |v_ULTIMATE.start_main_~i~0#1_113| 1))))))) is different from false [2021-12-06 20:39:47,956 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (and (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) 4) (< (+ |c_ULTIMATE.start_main_~a~0#1.base| 1) |ULTIMATE.start_main_~#sum~0#1.base|))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= 1 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_112| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_112| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_368 Int) (|v_ULTIMATE.start_main_~i~0#1_111| Int) (v_ArrVal_369 Int)) (or (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_112| 4)) v_ArrVal_368) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_111| 4)) v_ArrVal_369) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< |v_ULTIMATE.start_main_~i~0#1_111| (+ |v_ULTIMATE.start_main_~i~0#1_112| 1)))))) (forall ((|v_ULTIMATE.start_main_~i~0#1_111| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_111| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_369 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_111| 4)) v_ArrVal_369) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_113| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_113| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_368 Int) (v_ArrVal_366 Int) (|v_ULTIMATE.start_main_~i~0#1_112| Int) (|v_ULTIMATE.start_main_~i~0#1_111| Int) (v_ArrVal_369 Int)) (or (= (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_113| 4)) v_ArrVal_366) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_112| 4)) v_ArrVal_368) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_111| 4)) v_ArrVal_369) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< |v_ULTIMATE.start_main_~i~0#1_111| (+ |v_ULTIMATE.start_main_~i~0#1_112| 1)) (< |v_ULTIMATE.start_main_~i~0#1_112| (+ |v_ULTIMATE.start_main_~i~0#1_113| 1)))))) (exists ((~N~0 Int)) (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (mod 4 ~N~0)) (<= ~N~0 4) (< 3 ~N~0)))) is different from false [2021-12-06 20:39:52,551 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (and (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) 4) (< (+ |c_ULTIMATE.start_main_~a~0#1.base| 1) |ULTIMATE.start_main_~#sum~0#1.base|))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_112| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_112| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_368 Int) (|v_ULTIMATE.start_main_~i~0#1_111| Int) (v_ArrVal_369 Int)) (or (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_112| 4)) v_ArrVal_368) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_111| 4)) v_ArrVal_369) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< |v_ULTIMATE.start_main_~i~0#1_111| (+ |v_ULTIMATE.start_main_~i~0#1_112| 1)))))) (forall ((|v_ULTIMATE.start_main_~i~0#1_111| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_111| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_369 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_111| 4)) v_ArrVal_369) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_113| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_113| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_368 Int) (v_ArrVal_366 Int) (|v_ULTIMATE.start_main_~i~0#1_112| Int) (|v_ULTIMATE.start_main_~i~0#1_111| Int) (v_ArrVal_369 Int)) (or (= (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_113| 4)) v_ArrVal_366) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_112| 4)) v_ArrVal_368) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_111| 4)) v_ArrVal_369) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< |v_ULTIMATE.start_main_~i~0#1_111| (+ |v_ULTIMATE.start_main_~i~0#1_112| 1)) (< |v_ULTIMATE.start_main_~i~0#1_112| (+ |v_ULTIMATE.start_main_~i~0#1_113| 1)))))) (exists ((~N~0 Int)) (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (mod 4 ~N~0)) (<= ~N~0 4) (< 3 ~N~0))) (<= 2 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2021-12-06 20:39:57,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:39:57,388 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2021-12-06 20:39:57,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 20:39:57,389 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-06 20:39:57,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:39:57,390 INFO L225 Difference]: With dead ends: 94 [2021-12-06 20:39:57,390 INFO L226 Difference]: Without dead ends: 92 [2021-12-06 20:39:57,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 8 IntricatePredicates, 3 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 97.8s TimeCoverageRelationStatistics Valid=306, Invalid=1954, Unknown=28, NotChecked=792, Total=3080 [2021-12-06 20:39:57,392 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:39:57,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 126 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 248 Unchecked, 0.3s Time] [2021-12-06 20:39:57,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-06 20:39:57,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2021-12-06 20:39:57,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 70 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:39:57,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2021-12-06 20:39:57,405 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 28 [2021-12-06 20:39:57,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:39:57,405 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2021-12-06 20:39:57,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:39:57,405 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2021-12-06 20:39:57,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 20:39:57,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:39:57,406 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:39:57,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 20:39:57,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:39:57,608 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:39:57,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:39:57,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1146912830, now seen corresponding path program 2 times [2021-12-06 20:39:57,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:39:57,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502383084] [2021-12-06 20:39:57,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:39:57,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:39:57,637 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:39:57,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842434181] [2021-12-06 20:39:57,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:39:57,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:39:57,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:39:57,638 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:39:57,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 20:39:57,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:39:57,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:39:57,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 20:39:57,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:39:57,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 20:39:57,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 20:39:57,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 20:39:58,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 20:39:58,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:39:58,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 20:39:58,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:39:58,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 41 [2021-12-06 20:39:59,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:39:59,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:39:59,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 53 [2021-12-06 20:40:03,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:40:03,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 33 [2021-12-06 20:40:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:40:03,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:40:20,305 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_417 (Array Int Int)) (~N~0 Int)) (let ((.cse0 (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse1 (store v_ArrVal_417 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse2 4) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_417) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)))) (store .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse2) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)))))) (or (not (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 0)) (= 0 (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))) (< ~N~0 0)))) (forall ((v_ArrVal_417 (Array Int Int)) (~N~0 Int)) (let ((.cse3 (let ((.cse5 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse4 (store v_ArrVal_417 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse5 4) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_417) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)))) (store .cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse5) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse4) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)))))) (or (<= 0 ~N~0) (not (= (select .cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 0)) (= 0 (select .cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))))))) is different from false [2021-12-06 20:40:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 14 refuted. 5 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-06 20:40:22,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:40:22,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502383084] [2021-12-06 20:40:22,719 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:40:22,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842434181] [2021-12-06 20:40:22,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842434181] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:40:22,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:40:22,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-12-06 20:40:22,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8441628] [2021-12-06 20:40:22,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:40:22,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 20:40:22,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:40:22,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 20:40:22,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=767, Unknown=14, NotChecked=58, Total=992 [2021-12-06 20:40:22,721 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:40:25,576 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (~N~0 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse0 (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse1 (mod .cse0 ~N~0)) (.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (<= 3 .cse0) (< (+ |c_ULTIMATE.start_main_~a~0#1.base| 1) |ULTIMATE.start_main_~#sum~0#1.base|) (= .cse1 (select .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))) (= .cse1 (select .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))))) (let ((.cse3 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (mod (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) c_~N~0)))) (or (not (= (select .cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 0)) (= (select .cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) 0))) (forall ((~N~0 Int)) (or (<= 0 ~N~0) (let ((.cse14 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) (.cse9 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse14 4)) (.cse10 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse11 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse14)) (.cse6 (mod (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0))) (and (let ((.cse4 (let ((.cse8 (store .cse10 .cse11 (+ .cse6 ~N~0)))) (store .cse8 .cse9 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse8) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0))))) (or (not (= (select .cse4 .cse5) 0)) (= .cse6 0) (= (select .cse4 .cse7) 0))) (let ((.cse12 (let ((.cse13 (store .cse10 .cse11 .cse6))) (store .cse13 .cse9 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse13) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0))))) (or (not (= (select .cse12 .cse5) 0)) (= (select .cse12 .cse7) 0)))))))) (forall ((~N~0 Int)) (or (let ((.cse25 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse17 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse16 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) (.cse20 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse25 4)) (.cse21 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse22 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse25)) (.cse18 (mod (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0))) (and (let ((.cse15 (let ((.cse19 (store .cse21 .cse22 (+ .cse18 (* ~N~0 (- 1)))))) (store .cse19 .cse20 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse19) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0))))) (or (= (select .cse15 .cse16) 0) (not (= (select .cse15 .cse17) 0)) (= .cse18 0))) (let ((.cse23 (let ((.cse24 (store .cse21 .cse22 .cse18))) (store .cse24 .cse20 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse24) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0))))) (or (not (= (select .cse23 .cse17) 0)) (= (select .cse23 .cse16) 0)))))) (< ~N~0 0)))) is different from false [2021-12-06 20:40:26,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:40:26,418 INFO L93 Difference]: Finished difference Result 99 states and 112 transitions. [2021-12-06 20:40:26,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 20:40:26,418 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-06 20:40:26,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:40:26,420 INFO L225 Difference]: With dead ends: 99 [2021-12-06 20:40:26,420 INFO L226 Difference]: Without dead ends: 78 [2021-12-06 20:40:26,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=184, Invalid=931, Unknown=15, NotChecked=130, Total=1260 [2021-12-06 20:40:26,422 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:40:26,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 183 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 116 Unchecked, 0.6s Time] [2021-12-06 20:40:26,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-06 20:40:26,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-12-06 20:40:26,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 71 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:40:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2021-12-06 20:40:26,434 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 32 [2021-12-06 20:40:26,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:40:26,435 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2021-12-06 20:40:26,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:40:26,435 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2021-12-06 20:40:26,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 20:40:26,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:40:26,436 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:40:26,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 20:40:26,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:40:26,637 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:40:26,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:40:26,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1910230140, now seen corresponding path program 3 times [2021-12-06 20:40:26,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:40:26,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440205457] [2021-12-06 20:40:26,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:40:26,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:40:26,674 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:40:26,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [844648924] [2021-12-06 20:40:26,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:40:26,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:40:26,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:40:26,676 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:40:26,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 20:40:26,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 20:40:26,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:40:26,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-06 20:40:26,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:40:26,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 20:40:26,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 20:40:27,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 20:40:27,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 20:40:27,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 20:40:27,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:40:27,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 41 [2021-12-06 20:40:28,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:40:28,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:40:28,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2021-12-06 20:40:28,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:40:28,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:40:28,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:40:28,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:40:28,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2021-12-06 20:40:29,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:40:29,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:40:29,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:40:29,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:40:29,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 67 [2021-12-06 20:40:49,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:40:49,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:40:49,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:40:49,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 38 [2021-12-06 20:40:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:40:49,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:42:35,862 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_143| Int) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_144| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_144| (+ 2 |c_ULTIMATE.start_main_~i~0#1|)) (let ((.cse1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse0 (= (mod .cse1 ~N~0) 0))) (and (or .cse0 (<= 0 .cse1) (forall ((v_ArrVal_482 Int)) (let ((.cse2 (let ((.cse3 (store (let ((.cse5 (* |c_ULTIMATE.start_main_~i~0#1| 4)) (.cse6 (* ~N~0 (- 1)))) (let ((.cse4 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse5) (+ (mod (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0) .cse6)))) (store .cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse5 4) (+ (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse4) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0) .cse6)))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_144| 4)) v_ArrVal_482))) (store .cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_143| 4)) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0))))) (or (= (select .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 0) (not (= (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))))) (or (forall ((v_ArrVal_482 Int)) (let ((.cse7 (let ((.cse8 (store (let ((.cse10 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse9 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse10) (mod (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)))) (store .cse9 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse10 4) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse9) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_144| 4)) v_ArrVal_482))) (store .cse8 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_143| 4)) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse8) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0))))) (or (not (= (select .cse7 |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= (select .cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 0)))) (and (< .cse1 0) (not .cse0)))))) (< (+ |v_ULTIMATE.start_main_~i~0#1_143| 1) ~N~0) (< |v_ULTIMATE.start_main_~i~0#1_143| (+ |v_ULTIMATE.start_main_~i~0#1_144| 1)) (<= ~N~0 1))) is different from false [2021-12-06 20:42:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 10 refuted. 4 times theorem prover too weak. 16 trivial. 4 not checked. [2021-12-06 20:42:36,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:36,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440205457] [2021-12-06 20:42:36,176 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:36,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844648924] [2021-12-06 20:42:36,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844648924] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:42:36,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:42:36,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2021-12-06 20:42:36,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904750086] [2021-12-06 20:42:36,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:42:36,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 20:42:36,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:36,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 20:42:36,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=877, Unknown=37, NotChecked=64, Total=1190 [2021-12-06 20:42:36,178 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:42:43,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:43,755 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2021-12-06 20:42:43,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 20:42:43,757 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-06 20:42:43,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:43,758 INFO L225 Difference]: With dead ends: 85 [2021-12-06 20:42:43,758 INFO L226 Difference]: Without dead ends: 83 [2021-12-06 20:42:43,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 97.0s TimeCoverageRelationStatistics Valid=252, Invalid=973, Unknown=39, NotChecked=68, Total=1332 [2021-12-06 20:42:43,759 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:42:43,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 115 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 75 Invalid, 0 Unknown, 85 Unchecked, 0.6s Time] [2021-12-06 20:42:43,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-06 20:42:43,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2021-12-06 20:42:43,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 73 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:42:43,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2021-12-06 20:42:43,772 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 32 [2021-12-06 20:42:43,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:43,772 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2021-12-06 20:42:43,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:42:43,772 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2021-12-06 20:42:43,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 20:42:43,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:43,773 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:43,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 20:42:43,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 20:42:43,975 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:43,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:43,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2089702010, now seen corresponding path program 9 times [2021-12-06 20:42:43,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:43,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296502997] [2021-12-06 20:42:43,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:43,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:43,992 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:43,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800968689] [2021-12-06 20:42:43,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:42:43,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:43,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:43,993 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:43,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 20:42:44,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 20:42:44,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:42:44,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 20:42:44,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 49 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:42:45,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:42:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 49 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:42:46,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:42:46,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296502997] [2021-12-06 20:42:46,356 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:42:46,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800968689] [2021-12-06 20:42:46,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800968689] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:42:46,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:42:46,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-12-06 20:42:46,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754896087] [2021-12-06 20:42:46,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:42:46,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 20:42:46,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:42:46,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 20:42:46,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2021-12-06 20:42:46,358 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:42:52,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:42:52,203 INFO L93 Difference]: Finished difference Result 216 states and 234 transitions. [2021-12-06 20:42:52,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 20:42:52,205 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-06 20:42:52,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:42:52,206 INFO L225 Difference]: With dead ends: 216 [2021-12-06 20:42:52,206 INFO L226 Difference]: Without dead ends: 193 [2021-12-06 20:42:52,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=567, Invalid=1689, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 20:42:52,208 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 200 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:42:52,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 437 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-12-06 20:42:52,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-12-06 20:42:52,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 85. [2021-12-06 20:42:52,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.130952380952381) internal successors, (95), 84 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:42:52,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2021-12-06 20:42:52,227 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 36 [2021-12-06 20:42:52,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:42:52,228 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2021-12-06 20:42:52,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:42:52,228 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2021-12-06 20:42:52,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 20:42:52,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:42:52,228 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:42:52,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 20:42:52,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 20:42:52,430 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:42:52,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:42:52,431 INFO L85 PathProgramCache]: Analyzing trace with hash -835467152, now seen corresponding path program 4 times [2021-12-06 20:42:52,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:42:52,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555672554] [2021-12-06 20:42:52,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:42:52,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:42:52,458 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:42:52,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877825757] [2021-12-06 20:42:52,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:42:52,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:42:52,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:42:52,459 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:42:52,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 20:42:52,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:42:52,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:42:52,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 20:42:52,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:42:52,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 20:42:52,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 20:42:52,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 20:42:52,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 20:42:52,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 20:42:53,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:42:53,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 20:42:53,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:42:53,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 41 [2021-12-06 20:42:53,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:42:54,046 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 20:42:54,046 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 1 case distinctions, treesize of input 38 treesize of output 36 [2021-12-06 20:42:54,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:42:54,398 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 20:42:54,398 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 1 case distinctions, treesize of input 63 treesize of output 53 [2021-12-06 20:43:00,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:43:00,149 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 20:43:00,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 33 [2021-12-06 20:43:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:43:00,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:43:08,858 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((~N~0 Int)) (or (<= 0 ~N~0) (let ((.cse4 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse3 (= (mod .cse4 ~N~0) 0))) (and (or (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_608 Int)) (let ((.cse0 (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse1 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse2) (+ (mod (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0) ~N~0)) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse2 4) v_ArrVal_608))) (store .cse1 (+ |ULTIMATE.start_main_~a~0#1.offset| 8 .cse2) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)))))) (or (not (= (select .cse0 (+ |ULTIMATE.start_main_~a~0#1.offset| 4)) 0)) (= (select .cse0 (+ |ULTIMATE.start_main_~a~0#1.offset| 12)) 0)))) .cse3 (<= 0 .cse4)) (or (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_608 Int)) (let ((.cse5 (let ((.cse7 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse6 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse7) (mod (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse7 4) v_ArrVal_608))) (store .cse6 (+ |ULTIMATE.start_main_~a~0#1.offset| 8 .cse7) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse6) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)))))) (or (= (select .cse5 (+ |ULTIMATE.start_main_~a~0#1.offset| 12)) 0) (not (= (select .cse5 (+ |ULTIMATE.start_main_~a~0#1.offset| 4)) 0))))) (and (< .cse4 0) (not .cse3)))))))) (forall ((~N~0 Int)) (or (let ((.cse11 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse12 (= (mod .cse11 ~N~0) 0))) (and (or (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_608 Int)) (let ((.cse8 (let ((.cse10 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse9 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse10) (mod (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse10 4) v_ArrVal_608))) (store .cse9 (+ |ULTIMATE.start_main_~a~0#1.offset| 8 .cse10) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse9) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)))))) (or (= (select .cse8 (+ |ULTIMATE.start_main_~a~0#1.offset| 12)) 0) (not (= (select .cse8 (+ |ULTIMATE.start_main_~a~0#1.offset| 4)) 0))))) (and (< .cse11 0) (not .cse12))) (or (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_608 Int)) (let ((.cse13 (let ((.cse15 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse14 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse15) (+ (mod (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0) (* ~N~0 (- 1)))) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse15 4) v_ArrVal_608))) (store .cse14 (+ |ULTIMATE.start_main_~a~0#1.offset| 8 .cse15) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse14) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)))))) (or (not (= 0 (select .cse13 (+ |ULTIMATE.start_main_~a~0#1.offset| 4)))) (= (select .cse13 (+ |ULTIMATE.start_main_~a~0#1.offset| 12)) 0)))) .cse12 (<= 0 .cse11))))) (< ~N~0 0)))) is different from false [2021-12-06 20:43:12,955 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((~N~0 Int)) (or (let ((.cse1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse0 (= (mod .cse1 ~N~0) 0))) (and (or .cse0 (<= 0 .cse1) (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_608 Int)) (let ((.cse2 (let ((.cse4 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse3 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse4 4) (+ (mod (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0) (* ~N~0 (- 1)))) (+ |ULTIMATE.start_main_~a~0#1.offset| 8 .cse4) v_ArrVal_608))) (store .cse3 (+ |ULTIMATE.start_main_~a~0#1.offset| 12 .cse4) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)))))) (or (not (= (select .cse2 (+ |ULTIMATE.start_main_~a~0#1.offset| 4)) 0)) (= (select .cse2 (+ |ULTIMATE.start_main_~a~0#1.offset| 12)) 0))))) (or (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_608 Int)) (let ((.cse5 (let ((.cse7 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse6 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse7 4) (mod (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)) (+ |ULTIMATE.start_main_~a~0#1.offset| 8 .cse7) v_ArrVal_608))) (store .cse6 (+ |ULTIMATE.start_main_~a~0#1.offset| 12 .cse7) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse6) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)))))) (or (= (select .cse5 (+ |ULTIMATE.start_main_~a~0#1.offset| 12)) 0) (not (= (select .cse5 (+ |ULTIMATE.start_main_~a~0#1.offset| 4)) 0))))) (and (< .cse1 0) (not .cse0)))))) (< ~N~0 0))) (forall ((~N~0 Int)) (or (<= 0 ~N~0) (let ((.cse9 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse8 (= (mod .cse9 ~N~0) 0))) (and (or .cse8 (<= 0 .cse9) (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_608 Int)) (let ((.cse10 (let ((.cse12 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse11 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse12 4) (+ (mod (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0) ~N~0)) (+ |ULTIMATE.start_main_~a~0#1.offset| 8 .cse12) v_ArrVal_608))) (store .cse11 (+ |ULTIMATE.start_main_~a~0#1.offset| 12 .cse12) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse11) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)))))) (or (= (select .cse10 (+ |ULTIMATE.start_main_~a~0#1.offset| 12)) 0) (not (= (select .cse10 (+ |ULTIMATE.start_main_~a~0#1.offset| 4)) 0)))))) (or (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_608 Int)) (let ((.cse13 (let ((.cse15 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse14 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse15 4) (mod (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)) (+ |ULTIMATE.start_main_~a~0#1.offset| 8 .cse15) v_ArrVal_608))) (store .cse14 (+ |ULTIMATE.start_main_~a~0#1.offset| 12 .cse15) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse14) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)))))) (or (= (select .cse13 (+ |ULTIMATE.start_main_~a~0#1.offset| 12)) 0) (not (= (select .cse13 (+ |ULTIMATE.start_main_~a~0#1.offset| 4)) 0))))) (and (< .cse9 0) (not .cse8))))))))) is different from false [2021-12-06 20:43:26,434 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((~N~0 Int)) (or (<= 0 ~N~0) (and (forall ((v_ArrVal_604 (Array Int Int))) (or (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_608 Int)) (let ((.cse0 (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse1 (store (store v_ArrVal_604 (+ |ULTIMATE.start_main_~a~0#1.offset| .cse2 4) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_604) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)) (+ |ULTIMATE.start_main_~a~0#1.offset| 8 .cse2) v_ArrVal_608))) (store .cse1 (+ |ULTIMATE.start_main_~a~0#1.offset| 12 .cse2) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)))))) (or (= (select .cse0 (+ |ULTIMATE.start_main_~a~0#1.offset| 12)) 0) (not (= (select .cse0 (+ |ULTIMATE.start_main_~a~0#1.offset| 4)) 0))))) (let ((.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_604) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (and (< .cse3 0) (not (= (mod .cse3 ~N~0) 0)))))) (forall ((v_ArrVal_604 (Array Int Int))) (let ((.cse7 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_604) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (or (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_608 Int)) (let ((.cse4 (let ((.cse6 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse5 (store (store v_ArrVal_604 (+ |ULTIMATE.start_main_~a~0#1.offset| .cse6 4) (+ (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_604) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0) ~N~0)) (+ |ULTIMATE.start_main_~a~0#1.offset| 8 .cse6) v_ArrVal_608))) (store .cse5 (+ |ULTIMATE.start_main_~a~0#1.offset| 12 .cse6) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse5) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)))))) (or (= (select .cse4 (+ |ULTIMATE.start_main_~a~0#1.offset| 12)) 0) (not (= (select .cse4 (+ |ULTIMATE.start_main_~a~0#1.offset| 4)) 0))))) (= (mod .cse7 ~N~0) 0) (<= 0 .cse7))))))) (forall ((~N~0 Int)) (or (and (forall ((v_ArrVal_604 (Array Int Int))) (or (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_608 Int)) (let ((.cse8 (let ((.cse10 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse9 (store (store v_ArrVal_604 (+ |ULTIMATE.start_main_~a~0#1.offset| .cse10 4) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_604) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)) (+ |ULTIMATE.start_main_~a~0#1.offset| 8 .cse10) v_ArrVal_608))) (store .cse9 (+ |ULTIMATE.start_main_~a~0#1.offset| 12 .cse10) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse9) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)))))) (or (= (select .cse8 (+ |ULTIMATE.start_main_~a~0#1.offset| 12)) 0) (not (= (select .cse8 (+ |ULTIMATE.start_main_~a~0#1.offset| 4)) 0))))) (let ((.cse11 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_604) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (and (< .cse11 0) (not (= (mod .cse11 ~N~0) 0)))))) (forall ((v_ArrVal_604 (Array Int Int))) (let ((.cse12 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_604) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (or (= (mod .cse12 ~N~0) 0) (<= 0 .cse12) (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_608 Int)) (let ((.cse13 (let ((.cse15 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse14 (store (store v_ArrVal_604 (+ |ULTIMATE.start_main_~a~0#1.offset| .cse15 4) (+ (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_604) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0) (* ~N~0 (- 1)))) (+ |ULTIMATE.start_main_~a~0#1.offset| 8 .cse15) v_ArrVal_608))) (store .cse14 (+ |ULTIMATE.start_main_~a~0#1.offset| 12 .cse15) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse14) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)))))) (or (not (= (select .cse13 (+ |ULTIMATE.start_main_~a~0#1.offset| 4)) 0)) (= (select .cse13 (+ |ULTIMATE.start_main_~a~0#1.offset| 12)) 0)))))))) (< ~N~0 0)))) is different from false [2021-12-06 20:43:29,816 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((~N~0 Int)) (or (forall ((v_ArrVal_604 (Array Int Int))) (or (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_604) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (and (< .cse0 0) (not (= (mod .cse0 ~N~0) 0)))) (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_608 Int)) (let ((.cse3 (+ |ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse2 (store (store v_ArrVal_604 .cse3 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_604) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)) (+ |ULTIMATE.start_main_~a~0#1.offset| 8) v_ArrVal_608))) (let ((.cse1 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0))) (or (= .cse1 0) (not (= (select (store .cse2 (+ |ULTIMATE.start_main_~a~0#1.offset| 12) .cse1) .cse3) 0))))))))) (< ~N~0 0))) (forall ((~N~0 Int)) (or (<= 0 ~N~0) (forall ((v_ArrVal_604 (Array Int Int))) (or (let ((.cse4 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_604) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (and (< .cse4 0) (not (= (mod .cse4 ~N~0) 0)))) (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_608 Int)) (let ((.cse7 (+ |ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse6 (store (store v_ArrVal_604 .cse7 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_604) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0)) (+ |ULTIMATE.start_main_~a~0#1.offset| 8) v_ArrVal_608))) (let ((.cse5 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse6) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) ~N~0))) (or (= .cse5 0) (not (= (select (store .cse6 (+ |ULTIMATE.start_main_~a~0#1.offset| 12) .cse5) .cse7) 0)))))))))))) is different from false [2021-12-06 20:45:22,243 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 17 not checked. [2021-12-06 20:45:22,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:22,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555672554] [2021-12-06 20:45:22,244 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:45:22,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877825757] [2021-12-06 20:45:22,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877825757] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:22,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:45:22,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 39 [2021-12-06 20:45:22,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278544515] [2021-12-06 20:45:22,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:22,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 20:45:22,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:22,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 20:45:22,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=997, Unknown=11, NotChecked=276, Total=1482 [2021-12-06 20:45:22,245 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 39 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:37,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:37,035 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2021-12-06 20:45:37,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 20:45:37,035 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 39 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-06 20:45:37,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:37,036 INFO L225 Difference]: With dead ends: 128 [2021-12-06 20:45:37,036 INFO L226 Difference]: Without dead ends: 126 [2021-12-06 20:45:37,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 40 SyntacticMatches, 12 SemanticMatches, 43 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 40.5s TimeCoverageRelationStatistics Valid=251, Invalid=1394, Unknown=11, NotChecked=324, Total=1980 [2021-12-06 20:45:37,038 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 34 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:37,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 208 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 192 Unchecked, 1.5s Time] [2021-12-06 20:45:37,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-06 20:45:37,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 100. [2021-12-06 20:45:37,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.121212121212121) internal successors, (111), 99 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:37,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2021-12-06 20:45:37,054 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 40 [2021-12-06 20:45:37,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:37,054 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2021-12-06 20:45:37,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 39 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:37,055 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2021-12-06 20:45:37,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 20:45:37,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:37,055 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:37,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 20:45:37,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 20:45:37,257 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:37,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:37,258 INFO L85 PathProgramCache]: Analyzing trace with hash -2034440074, now seen corresponding path program 5 times [2021-12-06 20:45:37,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:37,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803540298] [2021-12-06 20:45:37,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:37,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:37,293 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:45:37,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114889926] [2021-12-06 20:45:37,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:45:37,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:37,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:37,295 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:37,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 20:45:37,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-06 20:45:37,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:45:37,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 20:45:37,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:45:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 36 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 20:45:38,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:45:39,790 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 36 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 20:45:39,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:45:39,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803540298] [2021-12-06 20:45:39,791 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:45:39,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114889926] [2021-12-06 20:45:39,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114889926] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:45:39,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:45:39,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-12-06 20:45:39,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982465192] [2021-12-06 20:45:39,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:45:39,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 20:45:39,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:45:39,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 20:45:39,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2021-12-06 20:45:39,793 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:42,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:45:42,312 INFO L93 Difference]: Finished difference Result 218 states and 234 transitions. [2021-12-06 20:45:42,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 20:45:42,313 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-06 20:45:42,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:45:42,314 INFO L225 Difference]: With dead ends: 218 [2021-12-06 20:45:42,314 INFO L226 Difference]: Without dead ends: 148 [2021-12-06 20:45:42,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=285, Invalid=837, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 20:45:42,316 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 308 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:45:42,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 121 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 20:45:42,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-06 20:45:42,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 112. [2021-12-06 20:45:42,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.09009009009009) internal successors, (121), 111 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:42,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2021-12-06 20:45:42,335 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 40 [2021-12-06 20:45:42,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:45:42,335 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2021-12-06 20:45:42,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:45:42,335 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2021-12-06 20:45:42,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 20:45:42,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:45:42,336 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:45:42,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-06 20:45:42,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 20:45:42,537 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:45:42,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:45:42,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1740648434, now seen corresponding path program 6 times [2021-12-06 20:45:42,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:45:42,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651604952] [2021-12-06 20:45:42,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:45:42,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:45:42,549 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:45:42,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926052792] [2021-12-06 20:45:42,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:45:42,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:45:42,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:45:42,550 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:45:42,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80ebe093-7a48-4932-bc79-af250927fe54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 20:45:42,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-06 20:45:42,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:45:42,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-06 20:45:42,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:45:42,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 20:45:43,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 20:45:43,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 20:45:43,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 20:45:43,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 20:45:43,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 20:45:44,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 20:45:44,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:45:44,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 41 [2021-12-06 20:45:45,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:45:45,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:45:45,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-12-06 20:45:45,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:45:45,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:45:45,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 53 [2021-12-06 20:45:46,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:45:46,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:45:46,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:45:46,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:45:46,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2021-12-06 20:45:47,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:45:47,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:45:47,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:45:47,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:45:47,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2021-12-06 20:45:48,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:45:48,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:45:48,589 INFO L354 Elim1Store]: treesize reduction 42, result has 40.8 percent of original size [2021-12-06 20:45:48,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 60 [2021-12-06 20:45:56,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:45:56,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 33 [2021-12-06 20:45:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 37 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:45:57,119 INFO L328 TraceCheckSpWp]: Computing backward predicates...