./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound20.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_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/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_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/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_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/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 c16561338eb70030ddc560fe6b7af6d1b48b7a566766a02092344cb5475a4c1a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:59:45,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:59:45,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:59:45,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:59:45,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:59:45,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:59:45,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:59:45,488 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:59:45,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:59:45,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:59:45,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:59:45,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:59:45,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:59:45,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:59:45,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:59:45,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:59:45,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:59:45,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:59:45,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:59:45,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:59:45,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:59:45,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:59:45,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:59:45,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:59:45,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:59:45,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:59:45,509 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:59:45,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:59:45,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:59:45,511 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:59:45,512 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:59:45,512 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:59:45,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:59:45,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:59:45,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:59:45,515 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:59:45,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:59:45,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:59:45,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:59:45,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:59:45,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:59:45,517 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:59:45,535 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:59:45,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:59:45,536 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:59:45,536 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:59:45,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:59:45,537 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:59:45,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:59:45,537 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:59:45,537 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:59:45,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:59:45,538 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:59:45,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:59:45,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:59:45,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:59:45,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:59:45,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:59:45,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:59:45,539 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:59:45,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:59:45,539 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:59:45,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:59:45,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:59:45,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:59:45,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:59:45,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:59:45,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:59:45,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:59:45,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:59:45,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:59:45,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:59:45,540 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:59:45,540 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:59:45,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:59:45,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:59:45,541 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_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c16561338eb70030ddc560fe6b7af6d1b48b7a566766a02092344cb5475a4c1a [2021-12-06 17:59:45,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:59:45,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:59:45,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:59:45,753 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:59:45,753 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:59:45,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound20.c [2021-12-06 17:59:45,812 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/data/b37397ea0/91d07b56dfe44b90a129abb9f3f5d0be/FLAG48b88c4fb [2021-12-06 17:59:46,193 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:59:46,194 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound20.c [2021-12-06 17:59:46,199 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/data/b37397ea0/91d07b56dfe44b90a129abb9f3f5d0be/FLAG48b88c4fb [2021-12-06 17:59:46,209 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/data/b37397ea0/91d07b56dfe44b90a129abb9f3f5d0be [2021-12-06 17:59:46,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:59:46,212 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:59:46,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:59:46,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:59:46,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:59:46,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:59:46" (1/1) ... [2021-12-06 17:59:46,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39c93bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:59:46, skipping insertion in model container [2021-12-06 17:59:46,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:59:46" (1/1) ... [2021-12-06 17:59:46,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:59:46,232 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:59:46,331 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_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound20.c[524,537] [2021-12-06 17:59:46,343 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:59:46,352 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:59:46,361 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_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound20.c[524,537] [2021-12-06 17:59:46,367 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:59:46,380 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:59:46,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:59:46 WrapperNode [2021-12-06 17:59:46,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:59:46,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:59:46,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:59:46,382 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:59:46,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:59:46" (1/1) ... [2021-12-06 17:59:46,393 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:59:46" (1/1) ... [2021-12-06 17:59:46,407 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 46 [2021-12-06 17:59:46,407 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:59:46,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:59:46,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:59:46,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:59:46,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:59:46" (1/1) ... [2021-12-06 17:59:46,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:59:46" (1/1) ... [2021-12-06 17:59:46,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:59:46" (1/1) ... [2021-12-06 17:59:46,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:59:46" (1/1) ... [2021-12-06 17:59:46,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:59:46" (1/1) ... [2021-12-06 17:59:46,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:59:46" (1/1) ... [2021-12-06 17:59:46,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:59:46" (1/1) ... [2021-12-06 17:59:46,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:59:46,423 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:59:46,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:59:46,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:59:46,424 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:59:46" (1/1) ... [2021-12-06 17:59:46,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:59:46,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:59:46,451 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:59:46,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:59:46,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:59:46,491 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 17:59:46,491 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 17:59:46,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:59:46,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:59:46,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:59:46,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 17:59:46,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 17:59:46,546 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:59:46,547 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:59:46,627 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:59:46,632 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:59:46,632 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 17:59:46,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:59:46 BoogieIcfgContainer [2021-12-06 17:59:46,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:59:46,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:59:46,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:59:46,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:59:46,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:59:46" (1/3) ... [2021-12-06 17:59:46,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf3201a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:59:46, skipping insertion in model container [2021-12-06 17:59:46,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:59:46" (2/3) ... [2021-12-06 17:59:46,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf3201a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:59:46, skipping insertion in model container [2021-12-06 17:59:46,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:59:46" (3/3) ... [2021-12-06 17:59:46,640 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound20.c [2021-12-06 17:59:46,644 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:59:46,644 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:59:46,681 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:59:46,686 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 17:59:46,686 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:59:46,699 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:59:46,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 17:59:46,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:46,704 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:59:46,704 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:46,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:46,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1086166160, now seen corresponding path program 1 times [2021-12-06 17:59:46,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:46,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722516458] [2021-12-06 17:59:46,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:46,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:46,806 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:59:46,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038302338] [2021-12-06 17:59:46,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:46,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:46,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:59:46,809 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:59:46,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:59:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:46,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 17:59:46,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:59:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:59:46,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:59:46,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:46,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722516458] [2021-12-06 17:59:46,920 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:59:46,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038302338] [2021-12-06 17:59:46,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038302338] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:59:46,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:59:46,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:59:46,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897747641] [2021-12-06 17:59:46,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:59:46,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 17:59:46,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:46,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 17:59:46,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:59:46,951 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 17:59:46,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:46,967 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-12-06 17:59:46,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 17:59:46,969 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-12-06 17:59:46,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:46,976 INFO L225 Difference]: With dead ends: 47 [2021-12-06 17:59:46,976 INFO L226 Difference]: Without dead ends: 21 [2021-12-06 17:59:46,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 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 17:59:46,983 INFO L933 BasicCegarLoop]: 29 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, 29 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 17:59:46,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:59:46,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-06 17:59:47,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-06 17:59:47,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:59:47,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-12-06 17:59:47,015 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2021-12-06 17:59:47,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:47,015 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-12-06 17:59:47,016 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 17:59:47,016 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-12-06 17:59:47,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 17:59:47,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:47,018 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:59:47,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:59:47,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-06 17:59:47,220 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:47,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:47,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1345709874, now seen corresponding path program 1 times [2021-12-06 17:59:47,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:47,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872493791] [2021-12-06 17:59:47,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:47,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:47,283 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:59:47,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783074110] [2021-12-06 17:59:47,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:47,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:47,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:59:47,289 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:59:47,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:59:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:47,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 17:59:47,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:59:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:59:47,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:59:47,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:47,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872493791] [2021-12-06 17:59:47,448 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:59:47,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783074110] [2021-12-06 17:59:47,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783074110] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:59:47,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:59:47,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:59:47,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142596653] [2021-12-06 17:59:47,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:59:47,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:59:47,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:47,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:59:47,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:59:47,451 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 17:59:47,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:47,465 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-12-06 17:59:47,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:59:47,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-12-06 17:59:47,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:47,467 INFO L225 Difference]: With dead ends: 30 [2021-12-06 17:59:47,467 INFO L226 Difference]: Without dead ends: 23 [2021-12-06 17:59:47,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:59:47,469 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:47,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:59:47,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-06 17:59:47,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-06 17:59:47,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:59:47,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-06 17:59:47,474 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 19 [2021-12-06 17:59:47,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:47,475 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-06 17:59:47,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 17:59:47,476 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-06 17:59:47,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 17:59:47,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:47,476 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:59:47,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:59:47,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:47,679 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:47,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:47,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1347497334, now seen corresponding path program 1 times [2021-12-06 17:59:47,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:47,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106038146] [2021-12-06 17:59:47,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:47,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:47,711 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:59:47,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966700007] [2021-12-06 17:59:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:47,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:47,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:59:47,716 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:59:47,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:59:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:47,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:59:47,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:59:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:59:47,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:59:47,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:47,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106038146] [2021-12-06 17:59:47,991 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:59:47,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966700007] [2021-12-06 17:59:47,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966700007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:59:47,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:59:47,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:59:47,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831289450] [2021-12-06 17:59:47,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:59:47,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:59:47,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:47,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:59:47,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:59:47,993 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 17:59:49,067 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 17:59:49,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:49,077 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-12-06 17:59:49,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:59:49,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-12-06 17:59:49,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:49,078 INFO L225 Difference]: With dead ends: 35 [2021-12-06 17:59:49,079 INFO L226 Difference]: Without dead ends: 33 [2021-12-06 17:59:49,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:59:49,080 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:49,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 75 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 17:59:49,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-06 17:59:49,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-12-06 17:59:49,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:59:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-12-06 17:59:49,086 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 19 [2021-12-06 17:59:49,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:49,086 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-12-06 17:59:49,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 17:59:49,086 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-12-06 17:59:49,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 17:59:49,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:49,087 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:59:49,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:59:49,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:49,289 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:49,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:49,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1636478750, now seen corresponding path program 1 times [2021-12-06 17:59:49,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:49,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897668617] [2021-12-06 17:59:49,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:49,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:49,319 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:59:49,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43020822] [2021-12-06 17:59:49,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:49,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:49,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:59:49,322 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:59:49,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:59:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:49,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 17:59:49,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:59:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:59:49,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:59:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:59:49,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:49,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897668617] [2021-12-06 17:59:49,563 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:59:49,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43020822] [2021-12-06 17:59:49,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43020822] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:59:49,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:59:49,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-12-06 17:59:49,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774405882] [2021-12-06 17:59:49,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:59:49,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:59:49,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:49,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:59:49,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:59:49,565 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 17:59:49,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:49,669 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-12-06 17:59:49,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:59:49,669 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2021-12-06 17:59:49,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:49,670 INFO L225 Difference]: With dead ends: 39 [2021-12-06 17:59:49,670 INFO L226 Difference]: Without dead ends: 34 [2021-12-06 17:59:49,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:59:49,672 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:49,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 128 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:59:49,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-06 17:59:49,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2021-12-06 17:59:49,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:59:49,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-12-06 17:59:49,679 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 25 [2021-12-06 17:59:49,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:49,679 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-12-06 17:59:49,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 17:59:49,680 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-12-06 17:59:49,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 17:59:49,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:49,681 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:59:49,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 17:59:49,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:49,883 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:49,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:49,885 INFO L85 PathProgramCache]: Analyzing trace with hash -126969667, now seen corresponding path program 1 times [2021-12-06 17:59:49,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:49,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933019918] [2021-12-06 17:59:49,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:49,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:49,920 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:59:49,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158569239] [2021-12-06 17:59:49,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:49,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:49,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:59:49,925 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:59:49,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:59:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:49,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 17:59:49,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:59:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:59:50,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:59:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:59:50,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:50,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933019918] [2021-12-06 17:59:50,079 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:59:50,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158569239] [2021-12-06 17:59:50,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158569239] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:59:50,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:59:50,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-12-06 17:59:50,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701297916] [2021-12-06 17:59:50,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:59:50,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:59:50,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:50,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:59:50,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:59:50,081 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 17:59:50,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:50,125 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-12-06 17:59:50,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:59:50,125 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 28 [2021-12-06 17:59:50,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:50,126 INFO L225 Difference]: With dead ends: 57 [2021-12-06 17:59:50,126 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 17:59:50,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:59:50,127 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:50,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 106 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:59:50,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 17:59:50,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-06 17:59:50,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 17:59:50,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-12-06 17:59:50,135 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 28 [2021-12-06 17:59:50,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:50,136 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-12-06 17:59:50,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 17:59:50,136 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-12-06 17:59:50,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 17:59:50,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:50,138 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:59:50,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 17:59:50,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:50,339 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:50,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:50,341 INFO L85 PathProgramCache]: Analyzing trace with hash 972990450, now seen corresponding path program 2 times [2021-12-06 17:59:50,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:50,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583037437] [2021-12-06 17:59:50,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:50,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:50,377 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:59:50,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320306785] [2021-12-06 17:59:50,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:59:50,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:50,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:59:50,380 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:59:50,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:59:50,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:59:50,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:59:50,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 17:59:50,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:59:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:59:50,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:59:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 17:59:50,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:50,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583037437] [2021-12-06 17:59:50,614 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:59:50,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320306785] [2021-12-06 17:59:50,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320306785] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:59:50,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:59:50,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-12-06 17:59:50,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750297082] [2021-12-06 17:59:50,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:59:50,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 17:59:50,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:50,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 17:59:50,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-06 17:59:50,616 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-06 17:59:50,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:50,745 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2021-12-06 17:59:50,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 17:59:50,746 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 55 [2021-12-06 17:59:50,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:50,747 INFO L225 Difference]: With dead ends: 111 [2021-12-06 17:59:50,747 INFO L226 Difference]: Without dead ends: 106 [2021-12-06 17:59:50,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2021-12-06 17:59:50,749 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 115 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:50,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 131 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:59:50,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-06 17:59:50,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-12-06 17:59:50,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 17:59:50,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2021-12-06 17:59:50,761 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 55 [2021-12-06 17:59:50,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:50,762 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2021-12-06 17:59:50,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-06 17:59:50,762 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2021-12-06 17:59:50,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-06 17:59:50,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:50,765 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:59:50,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 17:59:50,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:50,967 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:50,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:50,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1909967598, now seen corresponding path program 3 times [2021-12-06 17:59:50,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:50,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629114446] [2021-12-06 17:59:50,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:50,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:51,000 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:59:51,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068964752] [2021-12-06 17:59:51,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:59:51,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:51,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:59:51,004 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:59:51,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3079d75-bd9a-43f3-b8e7-dd884dbd17c5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process