./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF --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 deef9b1f63fa90bdeace0bbb769d25578ef53bda95c70ad5e444555427b2b0e2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:14:47,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:14:47,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:14:47,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:14:47,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:14:47,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:14:47,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:14:47,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:14:47,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:14:47,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:14:47,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:14:47,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:14:47,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:14:47,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:14:47,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:14:47,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:14:47,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:14:47,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:14:47,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:14:47,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:14:47,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:14:47,575 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:14:47,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:14:47,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:14:47,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:14:47,585 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:14:47,585 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:14:47,586 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:14:47,588 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:14:47,589 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:14:47,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:14:47,592 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:14:47,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:14:47,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:14:47,597 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:14:47,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:14:47,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:14:47,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:14:47,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:14:47,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:14:47,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:14:47,602 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:14:47,635 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:14:47,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:14:47,638 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:14:47,639 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:14:47,640 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:14:47,641 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:14:47,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:14:47,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:14:47,642 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:14:47,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:14:47,644 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:14:47,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:14:47,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:14:47,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:14:47,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:14:47,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:14:47,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:14:47,645 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:14:47,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:14:47,646 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:14:47,646 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:14:47,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:14:47,646 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:14:47,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:14:47,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:14:47,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:14:47,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:14:47,648 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:14:47,648 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:14:47,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:14:47,650 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:14:47,650 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:14:47,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:14:47,651 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:14:47,651 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_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> deef9b1f63fa90bdeace0bbb769d25578ef53bda95c70ad5e444555427b2b0e2 [2021-11-20 06:14:47,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:14:47,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:14:47,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:14:47,980 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:14:47,981 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:14:47,983 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2021-11-20 06:14:48,091 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/data/e5f5adcf1/cef9bfa63cbf40c4a41bb65d964960a4/FLAG4b6728790 [2021-11-20 06:14:48,587 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:14:48,587 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2021-11-20 06:14:48,595 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/data/e5f5adcf1/cef9bfa63cbf40c4a41bb65d964960a4/FLAG4b6728790 [2021-11-20 06:14:48,936 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/data/e5f5adcf1/cef9bfa63cbf40c4a41bb65d964960a4 [2021-11-20 06:14:48,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:14:48,939 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:14:48,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:14:48,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:14:48,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:14:48,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:14:48" (1/1) ... [2021-11-20 06:14:48,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cc942de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:48, skipping insertion in model container [2021-11-20 06:14:48,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:14:48" (1/1) ... [2021-11-20 06:14:48,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:14:48,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:14:49,176 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_6924b786-af10-48d6-b540-11175a936db9/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c[490,503] [2021-11-20 06:14:49,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:14:49,233 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:14:49,253 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_6924b786-af10-48d6-b540-11175a936db9/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c[490,503] [2021-11-20 06:14:49,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:14:49,295 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:14:49,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:49 WrapperNode [2021-11-20 06:14:49,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:14:49,298 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:14:49,298 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:14:49,298 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:14:49,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:49" (1/1) ... [2021-11-20 06:14:49,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:49" (1/1) ... [2021-11-20 06:14:49,364 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2021-11-20 06:14:49,364 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:14:49,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:14:49,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:14:49,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:14:49,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:49" (1/1) ... [2021-11-20 06:14:49,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:49" (1/1) ... [2021-11-20 06:14:49,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:49" (1/1) ... [2021-11-20 06:14:49,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:49" (1/1) ... [2021-11-20 06:14:49,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:49" (1/1) ... [2021-11-20 06:14:49,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:49" (1/1) ... [2021-11-20 06:14:49,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:49" (1/1) ... [2021-11-20 06:14:49,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:14:49,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:14:49,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:14:49,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:14:49,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:49" (1/1) ... [2021-11-20 06:14:49,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:14:49,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:49,450 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:14:49,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:14:49,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:14:49,503 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 06:14:49,503 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 06:14:49,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:14:49,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:14:49,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:14:49,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 06:14:49,504 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 06:14:49,567 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:14:49,568 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:14:49,737 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:14:49,744 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:14:49,744 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 06:14:49,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:14:49 BoogieIcfgContainer [2021-11-20 06:14:49,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:14:49,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:14:49,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:14:49,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:14:49,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:14:48" (1/3) ... [2021-11-20 06:14:49,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fec43e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:14:49, skipping insertion in model container [2021-11-20 06:14:49,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:49" (2/3) ... [2021-11-20 06:14:49,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fec43e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:14:49, skipping insertion in model container [2021-11-20 06:14:49,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:14:49" (3/3) ... [2021-11-20 06:14:49,757 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound50.c [2021-11-20 06:14:49,764 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:14:49,764 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:14:49,836 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:14:49,844 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 [2021-11-20 06:14:49,844 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:14:49,871 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 06:14:49,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 06:14:49,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:14:49,880 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:49,881 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:14:49,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:49,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1022199732, now seen corresponding path program 1 times [2021-11-20 06:14:49,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:49,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621239405] [2021-11-20 06:14:49,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:49,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:50,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:14:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:50,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:14:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:50,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:14:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:50,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:14:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:14:50,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:50,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621239405] [2021-11-20 06:14:50,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621239405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:14:50,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:14:50,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:14:50,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204126935] [2021-11-20 06:14:50,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:14:50,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:14:50,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:50,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:14:50,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:14:50,163 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:14:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:14:50,191 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2021-11-20 06:14:50,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:14:50,194 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-11-20 06:14:50,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:14:50,203 INFO L225 Difference]: With dead ends: 65 [2021-11-20 06:14:50,203 INFO L226 Difference]: Without dead ends: 30 [2021-11-20 06:14:50,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:14:50,212 INFO L933 BasicCegarLoop]: 45 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, 45 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 [2021-11-20 06:14:50,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:14:50,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-20 06:14:50,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-20 06:14:50,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 06:14:50,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2021-11-20 06:14:50,261 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 28 [2021-11-20 06:14:50,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:14:50,261 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2021-11-20 06:14:50,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:14:50,262 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2021-11-20 06:14:50,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 06:14:50,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:14:50,264 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:50,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:14:50,265 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:14:50,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:50,266 INFO L85 PathProgramCache]: Analyzing trace with hash -455220980, now seen corresponding path program 1 times [2021-11-20 06:14:50,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:50,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857863251] [2021-11-20 06:14:50,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:50,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:50,285 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:14:50,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [384748012] [2021-11-20 06:14:50,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:50,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:50,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:50,288 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:50,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:14:50,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:50,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:14:50,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:14:50,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:14:50,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:50,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857863251] [2021-11-20 06:14:50,538 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:14:50,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384748012] [2021-11-20 06:14:50,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384748012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:14:50,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:14:50,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:14:50,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504730902] [2021-11-20 06:14:50,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:14:50,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:14:50,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:50,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:14:50,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:14:50,544 INFO L87 Difference]: Start difference. First operand 30 states and 41 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 06:14:50,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:14:50,568 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2021-11-20 06:14:50,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:14:50,569 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-11-20 06:14:50,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:14:50,571 INFO L225 Difference]: With dead ends: 40 [2021-11-20 06:14:50,571 INFO L226 Difference]: Without dead ends: 32 [2021-11-20 06:14:50,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:14:50,574 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:14:50,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:14:50,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-20 06:14:50,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-20 06:14:50,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 06:14:50,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2021-11-20 06:14:50,586 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 29 [2021-11-20 06:14:50,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:14:50,587 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2021-11-20 06:14:50,588 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 06:14:50,588 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2021-11-20 06:14:50,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 06:14:50,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:14:50,590 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:50,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:50,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-20 06:14:50,812 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:14:50,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:50,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1233535180, now seen corresponding path program 1 times [2021-11-20 06:14:50,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:50,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916440516] [2021-11-20 06:14:50,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:50,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:50,833 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:14:50,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279624272] [2021-11-20 06:14:50,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:50,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:50,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:50,836 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:50,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:14:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:50,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:14:50,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:14:51,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:14:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:14:51,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:51,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916440516] [2021-11-20 06:14:51,156 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:14:51,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279624272] [2021-11-20 06:14:51,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279624272] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:14:51,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:14:51,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-20 06:14:51,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292184745] [2021-11-20 06:14:51,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:14:51,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:14:51,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:51,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:14:51,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:14:51,161 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:14:51,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:14:51,255 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2021-11-20 06:14:51,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:14:51,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-11-20 06:14:51,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:14:51,258 INFO L225 Difference]: With dead ends: 49 [2021-11-20 06:14:51,258 INFO L226 Difference]: Without dead ends: 41 [2021-11-20 06:14:51,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:14:51,261 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 30 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:14:51,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 111 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:14:51,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-20 06:14:51,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2021-11-20 06:14:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 06:14:51,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-11-20 06:14:51,274 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 30 [2021-11-20 06:14:51,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:14:51,274 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-11-20 06:14:51,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:14:51,275 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-11-20 06:14:51,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 06:14:51,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:14:51,277 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:51,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:51,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:51,491 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:14:51,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:51,492 INFO L85 PathProgramCache]: Analyzing trace with hash -73118621, now seen corresponding path program 1 times [2021-11-20 06:14:51,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:51,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369832705] [2021-11-20 06:14:51,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:51,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:51,518 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:14:51,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969907583] [2021-11-20 06:14:51,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:51,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:51,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:51,528 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:51,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:14:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:51,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:14:51,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:14:51,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:14:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:14:51,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:51,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369832705] [2021-11-20 06:14:51,966 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:14:51,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969907583] [2021-11-20 06:14:51,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969907583] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:14:51,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:14:51,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-11-20 06:14:51,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276224250] [2021-11-20 06:14:51,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:14:51,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:14:51,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:51,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:14:51,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:14:51,972 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 06:14:52,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:14:52,054 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2021-11-20 06:14:52,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:14:52,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2021-11-20 06:14:52,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:14:52,059 INFO L225 Difference]: With dead ends: 39 [2021-11-20 06:14:52,059 INFO L226 Difference]: Without dead ends: 37 [2021-11-20 06:14:52,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:14:52,062 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:14:52,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 124 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:14:52,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-20 06:14:52,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-20 06:14:52,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 06:14:52,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-11-20 06:14:52,085 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 32 [2021-11-20 06:14:52,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:14:52,086 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-11-20 06:14:52,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 06:14:52,087 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-11-20 06:14:52,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 06:14:52,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:14:52,094 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:52,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-20 06:14:52,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:52,295 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:14:52,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:52,296 INFO L85 PathProgramCache]: Analyzing trace with hash 96561445, now seen corresponding path program 1 times [2021-11-20 06:14:52,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:52,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920509665] [2021-11-20 06:14:52,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:52,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:52,315 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:14:52,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231863202] [2021-11-20 06:14:52,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:52,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:52,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:52,318 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:52,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:14:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:52,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:14:52,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:14:52,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:14:52,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:52,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920509665] [2021-11-20 06:14:52,524 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:14:52,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231863202] [2021-11-20 06:14:52,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231863202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:14:52,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:14:52,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:14:52,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213773813] [2021-11-20 06:14:52,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:14:52,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:14:52,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:52,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:14:52,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:14:52,527 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 06:14:52,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:14:52,576 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2021-11-20 06:14:52,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:14:52,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2021-11-20 06:14:52,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:14:52,580 INFO L225 Difference]: With dead ends: 62 [2021-11-20 06:14:52,580 INFO L226 Difference]: Without dead ends: 39 [2021-11-20 06:14:52,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:14:52,584 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:14:52,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 122 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:14:52,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-20 06:14:52,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-20 06:14:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 06:14:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2021-11-20 06:14:52,605 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 35 [2021-11-20 06:14:52,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:14:52,609 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2021-11-20 06:14:52,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 06:14:52,610 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2021-11-20 06:14:52,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 06:14:52,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:14:52,612 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:52,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:52,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:52,840 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:14:52,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:52,841 INFO L85 PathProgramCache]: Analyzing trace with hash 433790877, now seen corresponding path program 1 times [2021-11-20 06:14:52,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:52,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20458076] [2021-11-20 06:14:52,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:52,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:52,854 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:14:52,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379126187] [2021-11-20 06:14:52,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:52,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:52,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:52,856 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:52,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:14:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:52,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 06:14:52,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:14:53,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:14:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:14:53,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:53,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20458076] [2021-11-20 06:14:53,336 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:14:53,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379126187] [2021-11-20 06:14:53,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379126187] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:14:53,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:14:53,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-11-20 06:14:53,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82202975] [2021-11-20 06:14:53,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:14:53,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:14:53,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:53,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:14:53,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:14:53,340 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:14:53,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:14:53,397 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2021-11-20 06:14:53,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:14:53,398 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-11-20 06:14:53,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:14:53,401 INFO L225 Difference]: With dead ends: 53 [2021-11-20 06:14:53,401 INFO L226 Difference]: Without dead ends: 51 [2021-11-20 06:14:53,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:14:53,404 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:14:53,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 153 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:14:53,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-20 06:14:53,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-11-20 06:14:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 06:14:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2021-11-20 06:14:53,431 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 37 [2021-11-20 06:14:53,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:14:53,431 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2021-11-20 06:14:53,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:14:53,434 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2021-11-20 06:14:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 06:14:53,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:14:53,445 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:53,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:53,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 06:14:53,649 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:14:53,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:53,649 INFO L85 PathProgramCache]: Analyzing trace with hash -553232285, now seen corresponding path program 1 times [2021-11-20 06:14:53,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:53,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988709837] [2021-11-20 06:14:53,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:53,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:53,658 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:14:53,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15336340] [2021-11-20 06:14:53,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:53,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:53,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:53,659 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:53,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:14:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:53,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 06:14:53,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 06:14:54,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:14:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 06:14:54,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:54,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988709837] [2021-11-20 06:14:54,164 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:14:54,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15336340] [2021-11-20 06:14:54,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15336340] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:14:54,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:14:54,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-11-20 06:14:54,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930868763] [2021-11-20 06:14:54,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:14:54,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:14:54,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:54,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:14:54,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:14:54,169 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 06:14:54,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:14:54,234 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2021-11-20 06:14:54,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:14:54,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2021-11-20 06:14:54,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:14:54,237 INFO L225 Difference]: With dead ends: 57 [2021-11-20 06:14:54,237 INFO L226 Difference]: Without dead ends: 55 [2021-11-20 06:14:54,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:14:54,239 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:14:54,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 144 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:14:54,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-20 06:14:54,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-11-20 06:14:54,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 35 states have internal predecessors, (41), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 06:14:54,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2021-11-20 06:14:54,263 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 42 [2021-11-20 06:14:54,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:14:54,264 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2021-11-20 06:14:54,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 06:14:54,264 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2021-11-20 06:14:54,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 06:14:54,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:14:54,266 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:54,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:54,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 06:14:54,480 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:14:54,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:54,481 INFO L85 PathProgramCache]: Analyzing trace with hash 2115683101, now seen corresponding path program 1 times [2021-11-20 06:14:54,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:54,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650563599] [2021-11-20 06:14:54,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:54,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:54,490 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:14:54,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088684737] [2021-11-20 06:14:54,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:54,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:54,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:54,492 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:54,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:14:54,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:54,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:14:54,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 06:14:54,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:14:55,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:55,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650563599] [2021-11-20 06:14:55,070 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:14:55,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088684737] [2021-11-20 06:14:55,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088684737] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:14:55,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:14:55,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-20 06:14:55,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767459254] [2021-11-20 06:14:55,071 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:14:55,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:14:55,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:55,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:14:55,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:14:55,073 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:14:55,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:14:55,267 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2021-11-20 06:14:55,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:14:55,268 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-11-20 06:14:55,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:14:55,271 INFO L225 Difference]: With dead ends: 61 [2021-11-20 06:14:55,272 INFO L226 Difference]: Without dead ends: 59 [2021-11-20 06:14:55,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:14:55,273 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:14:55,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 152 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:14:55,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-20 06:14:55,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-11-20 06:14:55,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 06:14:55,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2021-11-20 06:14:55,295 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 47 [2021-11-20 06:14:55,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:14:55,296 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2021-11-20 06:14:55,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:14:55,297 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2021-11-20 06:14:55,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 06:14:55,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:14:55,299 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:55,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:55,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:55,513 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:14:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:55,513 INFO L85 PathProgramCache]: Analyzing trace with hash -879665460, now seen corresponding path program 1 times [2021-11-20 06:14:55,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:55,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038183726] [2021-11-20 06:14:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:55,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:55,522 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:14:55,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003413530] [2021-11-20 06:14:55,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:55,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:55,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:55,523 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:55,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:14:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:55,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:14:55,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-20 06:14:55,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:14:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-20 06:14:55,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:55,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038183726] [2021-11-20 06:14:55,973 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:14:55,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003413530] [2021-11-20 06:14:55,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003413530] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:14:55,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:14:55,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-11-20 06:14:55,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821541316] [2021-11-20 06:14:55,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:14:55,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:14:55,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:55,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:14:55,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:14:55,975 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-20 06:14:56,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:14:56,202 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2021-11-20 06:14:56,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:14:56,203 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 56 [2021-11-20 06:14:56,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:14:56,206 INFO L225 Difference]: With dead ends: 211 [2021-11-20 06:14:56,206 INFO L226 Difference]: Without dead ends: 203 [2021-11-20 06:14:56,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:14:56,208 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 97 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:14:56,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 264 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:14:56,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-20 06:14:56,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2021-11-20 06:14:56,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 125 states have (on average 1.192) internal successors, (149), 129 states have internal predecessors, (149), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-11-20 06:14:56,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 233 transitions. [2021-11-20 06:14:56,235 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 233 transitions. Word has length 56 [2021-11-20 06:14:56,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:14:56,235 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 233 transitions. [2021-11-20 06:14:56,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-20 06:14:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 233 transitions. [2021-11-20 06:14:56,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 06:14:56,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:14:56,237 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:56,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:56,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:56,462 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:14:56,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:56,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1506412172, now seen corresponding path program 1 times [2021-11-20 06:14:56,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:56,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011182383] [2021-11-20 06:14:56,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:56,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:56,478 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:14:56,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662566514] [2021-11-20 06:14:56,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:56,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:56,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:56,480 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:56,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:14:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:56,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:14:56,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:14:56,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:14:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:14:56,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:56,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011182383] [2021-11-20 06:14:56,909 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:14:56,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662566514] [2021-11-20 06:14:56,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662566514] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:14:56,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:14:56,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-20 06:14:56,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707604589] [2021-11-20 06:14:56,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:14:56,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:14:56,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:56,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:14:56,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:14:56,913 INFO L87 Difference]: Start difference. First operand 195 states and 233 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 06:14:57,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:14:57,183 INFO L93 Difference]: Finished difference Result 279 states and 364 transitions. [2021-11-20 06:14:57,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:14:57,184 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 57 [2021-11-20 06:14:57,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:14:57,187 INFO L225 Difference]: With dead ends: 279 [2021-11-20 06:14:57,187 INFO L226 Difference]: Without dead ends: 259 [2021-11-20 06:14:57,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:14:57,189 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 62 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:14:57,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 419 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:14:57,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-20 06:14:57,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2021-11-20 06:14:57,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.2236842105263157) internal successors, (186), 155 states have internal predecessors, (186), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2021-11-20 06:14:57,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2021-11-20 06:14:57,222 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 57 [2021-11-20 06:14:57,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:14:57,223 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2021-11-20 06:14:57,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 06:14:57,223 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2021-11-20 06:14:57,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 06:14:57,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:14:57,224 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:57,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:57,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:14:57,448 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:14:57,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:57,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1869160295, now seen corresponding path program 1 times [2021-11-20 06:14:57,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:57,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946855441] [2021-11-20 06:14:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:57,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:57,458 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:14:57,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982518574] [2021-11-20 06:14:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:57,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:57,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:57,459 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:57,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:14:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:57,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:14:57,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-20 06:14:57,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:14:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-20 06:14:57,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:57,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946855441] [2021-11-20 06:14:57,866 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:14:57,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982518574] [2021-11-20 06:14:57,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982518574] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:14:57,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:14:57,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-11-20 06:14:57,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813380282] [2021-11-20 06:14:57,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:14:57,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:14:57,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:57,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:14:57,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:14:57,869 INFO L87 Difference]: Start difference. First operand 235 states and 299 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-20 06:14:58,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:14:58,071 INFO L93 Difference]: Finished difference Result 344 states and 448 transitions. [2021-11-20 06:14:58,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:14:58,072 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 59 [2021-11-20 06:14:58,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:14:58,074 INFO L225 Difference]: With dead ends: 344 [2021-11-20 06:14:58,074 INFO L226 Difference]: Without dead ends: 248 [2021-11-20 06:14:58,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:14:58,076 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 77 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:14:58,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 188 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:14:58,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-20 06:14:58,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2021-11-20 06:14:58,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 161 states have (on average 1.173913043478261) internal successors, (189), 164 states have internal predecessors, (189), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2021-11-20 06:14:58,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 302 transitions. [2021-11-20 06:14:58,106 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 302 transitions. Word has length 59 [2021-11-20 06:14:58,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:14:58,106 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 302 transitions. [2021-11-20 06:14:58,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-20 06:14:58,106 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 302 transitions. [2021-11-20 06:14:58,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 06:14:58,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:14:58,108 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:58,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:58,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:58,320 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:14:58,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:58,321 INFO L85 PathProgramCache]: Analyzing trace with hash 991223133, now seen corresponding path program 1 times [2021-11-20 06:14:58,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:58,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195067345] [2021-11-20 06:14:58,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:58,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:58,329 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:14:58,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776105022] [2021-11-20 06:14:58,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:58,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:58,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:58,331 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:58,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:14:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:58,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:14:58,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:58,750 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 06:14:58,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:14:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 06:14:58,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:58,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195067345] [2021-11-20 06:14:58,959 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:14:58,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776105022] [2021-11-20 06:14:58,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776105022] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:14:58,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:14:58,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-11-20 06:14:58,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957892452] [2021-11-20 06:14:58,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:14:58,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:14:58,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:58,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:14:58,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:14:58,962 INFO L87 Difference]: Start difference. First operand 244 states and 302 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-20 06:14:59,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:14:59,118 INFO L93 Difference]: Finished difference Result 283 states and 355 transitions. [2021-11-20 06:14:59,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:14:59,118 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 64 [2021-11-20 06:14:59,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:14:59,121 INFO L225 Difference]: With dead ends: 283 [2021-11-20 06:14:59,121 INFO L226 Difference]: Without dead ends: 278 [2021-11-20 06:14:59,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:14:59,123 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 26 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:14:59,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 317 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:14:59,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-20 06:14:59,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 276. [2021-11-20 06:14:59,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 183 states have (on average 1.185792349726776) internal successors, (217), 187 states have internal predecessors, (217), 65 states have call successors, (65), 27 states have call predecessors, (65), 27 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2021-11-20 06:14:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 343 transitions. [2021-11-20 06:14:59,153 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 343 transitions. Word has length 64 [2021-11-20 06:14:59,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:14:59,154 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 343 transitions. [2021-11-20 06:14:59,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-20 06:14:59,154 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 343 transitions. [2021-11-20 06:14:59,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 06:14:59,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:14:59,156 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:59,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:59,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 06:14:59,384 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:14:59,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:59,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1694315171, now seen corresponding path program 2 times [2021-11-20 06:14:59,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:59,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668404758] [2021-11-20 06:14:59,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:59,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:59,393 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:14:59,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183047244] [2021-11-20 06:14:59,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:14:59,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:59,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:59,394 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:59,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:14:59,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:14:59,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:14:59,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-20 06:14:59,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-20 06:15:00,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:00,534 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-20 06:15:00,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:15:00,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668404758] [2021-11-20 06:15:00,534 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:15:00,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183047244] [2021-11-20 06:15:00,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183047244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:15:00,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:15:00,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-11-20 06:15:00,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626962462] [2021-11-20 06:15:00,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:15:00,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:15:00,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:15:00,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:15:00,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:15:00,537 INFO L87 Difference]: Start difference. First operand 276 states and 343 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-20 06:15:03,435 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:15:04,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:15:04,109 INFO L93 Difference]: Finished difference Result 291 states and 357 transitions. [2021-11-20 06:15:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:15:04,125 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 69 [2021-11-20 06:15:04,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:15:04,127 INFO L225 Difference]: With dead ends: 291 [2021-11-20 06:15:04,127 INFO L226 Difference]: Without dead ends: 288 [2021-11-20 06:15:04,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:15:04,129 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 64 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 93 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:15:04,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 326 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 289 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-11-20 06:15:04,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-20 06:15:04,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 286. [2021-11-20 06:15:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 192 states have (on average 1.1770833333333333) internal successors, (226), 195 states have internal predecessors, (226), 63 states have call successors, (63), 30 states have call predecessors, (63), 30 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2021-11-20 06:15:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 349 transitions. [2021-11-20 06:15:04,172 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 349 transitions. Word has length 69 [2021-11-20 06:15:04,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:15:04,172 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 349 transitions. [2021-11-20 06:15:04,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-20 06:15:04,173 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 349 transitions. [2021-11-20 06:15:04,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-20 06:15:04,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:15:04,174 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:04,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:04,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 06:15:04,388 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:15:04,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:04,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1349365539, now seen corresponding path program 3 times [2021-11-20 06:15:04,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:15:04,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27537918] [2021-11-20 06:15:04,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:04,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:15:04,407 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:15:04,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244883141] [2021-11-20 06:15:04,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:15:04,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:15:04,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:15:04,409 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:15:04,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:15:04,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:15:04,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:15:04,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 06:15:04,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:05,172 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-20 06:15:05,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:05,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:15:05,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27537918] [2021-11-20 06:15:05,349 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:15:05,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244883141] [2021-11-20 06:15:05,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244883141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:15:05,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:15:05,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-20 06:15:05,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094409524] [2021-11-20 06:15:05,349 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:15:05,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:15:05,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:15:05,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:15:05,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:15:05,351 INFO L87 Difference]: Start difference. First operand 286 states and 349 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-20 06:15:05,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:15:05,709 INFO L93 Difference]: Finished difference Result 309 states and 369 transitions. [2021-11-20 06:15:05,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:15:05,710 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 74 [2021-11-20 06:15:05,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:15:05,712 INFO L225 Difference]: With dead ends: 309 [2021-11-20 06:15:05,713 INFO L226 Difference]: Without dead ends: 305 [2021-11-20 06:15:05,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:15:05,714 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 26 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:15:05,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 285 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:15:05,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-20 06:15:05,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 304. [2021-11-20 06:15:05,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 206 states have (on average 1.1601941747572815) internal successors, (239), 208 states have internal predecessors, (239), 63 states have call successors, (63), 35 states have call predecessors, (63), 34 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2021-11-20 06:15:05,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 362 transitions. [2021-11-20 06:15:05,763 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 362 transitions. Word has length 74 [2021-11-20 06:15:05,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:15:05,763 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 362 transitions. [2021-11-20 06:15:05,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-20 06:15:05,764 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 362 transitions. [2021-11-20 06:15:05,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-20 06:15:05,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:15:05,766 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:05,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:05,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:15:05,980 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:15:05,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:05,981 INFO L85 PathProgramCache]: Analyzing trace with hash -484140586, now seen corresponding path program 1 times [2021-11-20 06:15:05,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:15:05,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679780220] [2021-11-20 06:15:05,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:05,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:15:05,992 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:15:05,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534183613] [2021-11-20 06:15:05,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:05,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:15:05,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:15:05,997 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:15:06,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:15:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:06,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-20 06:15:06,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-20 06:15:06,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:08,056 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-20 06:15:08,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:15:08,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679780220] [2021-11-20 06:15:08,057 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:15:08,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534183613] [2021-11-20 06:15:08,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534183613] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:15:08,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:15:08,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-11-20 06:15:08,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499751203] [2021-11-20 06:15:08,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:15:08,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:15:08,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:15:08,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:15:08,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:15:08,060 INFO L87 Difference]: Start difference. First operand 304 states and 362 transitions. Second operand has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2021-11-20 06:15:18,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:15:18,095 INFO L93 Difference]: Finished difference Result 441 states and 580 transitions. [2021-11-20 06:15:18,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 06:15:18,096 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 80 [2021-11-20 06:15:18,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:15:18,099 INFO L225 Difference]: With dead ends: 441 [2021-11-20 06:15:18,099 INFO L226 Difference]: Without dead ends: 426 [2021-11-20 06:15:18,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 06:15:18,101 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 95 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:15:18,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 605 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-11-20 06:15:18,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-11-20 06:15:18,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 392. [2021-11-20 06:15:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 259 states have (on average 1.22007722007722) internal successors, (316), 260 states have internal predecessors, (316), 97 states have call successors, (97), 35 states have call predecessors, (97), 35 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-20 06:15:18,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 509 transitions. [2021-11-20 06:15:18,171 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 509 transitions. Word has length 80 [2021-11-20 06:15:18,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:15:18,172 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 509 transitions. [2021-11-20 06:15:18,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2021-11-20 06:15:18,172 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 509 transitions. [2021-11-20 06:15:18,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-20 06:15:18,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:15:18,174 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:18,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:18,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 06:15:18,400 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:15:18,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:18,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1718599493, now seen corresponding path program 1 times [2021-11-20 06:15:18,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:15:18,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095432830] [2021-11-20 06:15:18,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:18,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:15:18,408 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:15:18,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143237376] [2021-11-20 06:15:18,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:18,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:15:18,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:15:18,425 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:15:18,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:15:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:18,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-20 06:15:18,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 65 proven. 78 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-20 06:15:20,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 79 proven. 37 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-20 06:15:35,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:15:35,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095432830] [2021-11-20 06:15:35,880 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:15:35,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143237376] [2021-11-20 06:15:35,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143237376] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:15:35,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:15:35,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 26 [2021-11-20 06:15:35,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867555919] [2021-11-20 06:15:35,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:15:35,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 06:15:35,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:15:35,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 06:15:35,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:15:35,885 INFO L87 Difference]: Start difference. First operand 392 states and 509 transitions. Second operand has 26 states, 23 states have (on average 2.217391304347826) internal successors, (51), 18 states have internal predecessors, (51), 16 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 14 states have call predecessors, (30), 15 states have call successors, (30) [2021-11-20 06:15:47,737 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:15:49,749 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:15:51,752 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:15:53,999 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:15:56,058 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:15:58,401 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:16:09,048 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:16:12,072 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:16:14,077 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:16:26,571 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:16:33,334 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:16:38,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:38,216 INFO L93 Difference]: Finished difference Result 519 states and 703 transitions. [2021-11-20 06:16:38,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 06:16:38,217 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.217391304347826) internal successors, (51), 18 states have internal predecessors, (51), 16 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 14 states have call predecessors, (30), 15 states have call successors, (30) Word has length 97 [2021-11-20 06:16:38,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:38,222 INFO L225 Difference]: With dead ends: 519 [2021-11-20 06:16:38,223 INFO L226 Difference]: Without dead ends: 517 [2021-11-20 06:16:38,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 165 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 39.3s TimeCoverageRelationStatistics Valid=526, Invalid=1636, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 06:16:38,245 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 197 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 260 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:38,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 531 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 834 Invalid, 11 Unknown, 0 Unchecked, 31.9s Time] [2021-11-20 06:16:38,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-11-20 06:16:38,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 491. [2021-11-20 06:16:38,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 315 states have (on average 1.253968253968254) internal successors, (395), 320 states have internal predecessors, (395), 137 states have call successors, (137), 38 states have call predecessors, (137), 38 states have return successors, (136), 132 states have call predecessors, (136), 136 states have call successors, (136) [2021-11-20 06:16:38,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 668 transitions. [2021-11-20 06:16:38,387 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 668 transitions. Word has length 97 [2021-11-20 06:16:38,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:38,387 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 668 transitions. [2021-11-20 06:16:38,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.217391304347826) internal successors, (51), 18 states have internal predecessors, (51), 16 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 14 states have call predecessors, (30), 15 states have call successors, (30) [2021-11-20 06:16:38,388 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 668 transitions. [2021-11-20 06:16:38,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 06:16:38,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:38,391 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:38,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:16:38,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:16:38,600 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:16:38,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:38,601 INFO L85 PathProgramCache]: Analyzing trace with hash 160443165, now seen corresponding path program 4 times [2021-11-20 06:16:38,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:38,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203600627] [2021-11-20 06:16:38,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:38,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:38,607 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:16:38,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933248687] [2021-11-20 06:16:38,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:16:38,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:16:38,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:16:38,612 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:16:38,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:16:38,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:16:38,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:16:38,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:16:38,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:16:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-20 06:16:38,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:16:38,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:38,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203600627] [2021-11-20 06:16:38,846 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:16:38,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933248687] [2021-11-20 06:16:38,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933248687] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:16:38,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:16:38,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:16:38,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109403087] [2021-11-20 06:16:38,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:16:38,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:16:38,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:38,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:16:38,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:16:38,848 INFO L87 Difference]: Start difference. First operand 491 states and 668 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-20 06:16:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:39,069 INFO L93 Difference]: Finished difference Result 724 states and 1046 transitions. [2021-11-20 06:16:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:16:39,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 101 [2021-11-20 06:16:39,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:39,075 INFO L225 Difference]: With dead ends: 724 [2021-11-20 06:16:39,075 INFO L226 Difference]: Without dead ends: 560 [2021-11-20 06:16:39,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:16:39,077 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 12 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:39,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 178 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:16:39,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-11-20 06:16:39,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 506. [2021-11-20 06:16:39,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 326 states have (on average 1.2576687116564418) internal successors, (410), 330 states have internal predecessors, (410), 141 states have call successors, (141), 38 states have call predecessors, (141), 38 states have return successors, (140), 137 states have call predecessors, (140), 140 states have call successors, (140) [2021-11-20 06:16:39,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 691 transitions. [2021-11-20 06:16:39,254 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 691 transitions. Word has length 101 [2021-11-20 06:16:39,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:39,254 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 691 transitions. [2021-11-20 06:16:39,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-20 06:16:39,255 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 691 transitions. [2021-11-20 06:16:39,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 06:16:39,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:39,257 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:39,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:16:39,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:16:39,464 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:16:39,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:39,465 INFO L85 PathProgramCache]: Analyzing trace with hash -245423741, now seen corresponding path program 1 times [2021-11-20 06:16:39,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:39,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838976116] [2021-11-20 06:16:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:39,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:39,486 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:16:39,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386190430] [2021-11-20 06:16:39,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:39,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:16:39,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:16:39,490 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:16:39,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:16:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:39,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 06:16:39,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:16:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-20 06:16:39,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:16:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-11-20 06:16:40,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:40,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838976116] [2021-11-20 06:16:40,162 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:16:40,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386190430] [2021-11-20 06:16:40,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386190430] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:16:40,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:16:40,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-11-20 06:16:40,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203361835] [2021-11-20 06:16:40,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:16:40,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:16:40,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:40,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:16:40,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:16:40,165 INFO L87 Difference]: Start difference. First operand 506 states and 691 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2021-11-20 06:16:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:41,297 INFO L93 Difference]: Finished difference Result 1845 states and 2580 transitions. [2021-11-20 06:16:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 06:16:41,298 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 112 [2021-11-20 06:16:41,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:41,310 INFO L225 Difference]: With dead ends: 1845 [2021-11-20 06:16:41,311 INFO L226 Difference]: Without dead ends: 1628 [2021-11-20 06:16:41,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:16:41,314 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 298 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:41,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 427 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:16:41,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-11-20 06:16:41,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1572. [2021-11-20 06:16:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 979 states have (on average 1.1961184882533198) internal successors, (1171), 994 states have internal predecessors, (1171), 460 states have call successors, (460), 133 states have call predecessors, (460), 132 states have return successors, (452), 444 states have call predecessors, (452), 452 states have call successors, (452) [2021-11-20 06:16:41,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 2083 transitions. [2021-11-20 06:16:41,814 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 2083 transitions. Word has length 112 [2021-11-20 06:16:41,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:41,816 INFO L470 AbstractCegarLoop]: Abstraction has 1572 states and 2083 transitions. [2021-11-20 06:16:41,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2021-11-20 06:16:41,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 2083 transitions. [2021-11-20 06:16:41,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-20 06:16:41,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:41,820 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:41,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:16:42,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:16:42,033 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:16:42,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:42,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1036292276, now seen corresponding path program 1 times [2021-11-20 06:16:42,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:42,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148113099] [2021-11-20 06:16:42,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:42,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:42,046 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:16:42,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828627714] [2021-11-20 06:16:42,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:42,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:16:42,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:16:42,055 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:16:42,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 06:16:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:42,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 06:16:42,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:16:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-20 06:16:42,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:16:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2021-11-20 06:16:42,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:42,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148113099] [2021-11-20 06:16:42,781 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:16:42,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828627714] [2021-11-20 06:16:42,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828627714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:16:42,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:16:42,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-11-20 06:16:42,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821655035] [2021-11-20 06:16:42,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:16:42,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:16:42,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:42,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:16:42,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:16:42,786 INFO L87 Difference]: Start difference. First operand 1572 states and 2083 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2021-11-20 06:16:43,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:43,671 INFO L93 Difference]: Finished difference Result 1644 states and 2153 transitions. [2021-11-20 06:16:43,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 06:16:43,672 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) Word has length 129 [2021-11-20 06:16:43,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:43,686 INFO L225 Difference]: With dead ends: 1644 [2021-11-20 06:16:43,686 INFO L226 Difference]: Without dead ends: 1604 [2021-11-20 06:16:43,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:16:43,689 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 295 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:43,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 320 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:16:43,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-11-20 06:16:44,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1590. [2021-11-20 06:16:44,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 997 states have (on average 1.160481444332999) internal successors, (1157), 1012 states have internal predecessors, (1157), 460 states have call successors, (460), 133 states have call predecessors, (460), 132 states have return successors, (452), 444 states have call predecessors, (452), 452 states have call successors, (452) [2021-11-20 06:16:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 2069 transitions. [2021-11-20 06:16:44,231 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 2069 transitions. Word has length 129 [2021-11-20 06:16:44,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:44,232 INFO L470 AbstractCegarLoop]: Abstraction has 1590 states and 2069 transitions. [2021-11-20 06:16:44,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2021-11-20 06:16:44,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 2069 transitions. [2021-11-20 06:16:44,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 06:16:44,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:44,237 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:44,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:16:44,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:16:44,456 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:16:44,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:44,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2066876172, now seen corresponding path program 2 times [2021-11-20 06:16:44,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:44,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978503939] [2021-11-20 06:16:44,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:44,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:44,468 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:16:44,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227674073] [2021-11-20 06:16:44,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:16:44,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:16:44,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:16:44,474 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:16:44,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 06:16:44,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:16:44,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:16:44,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-20 06:16:44,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:16:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 130 proven. 98 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-11-20 06:16:45,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:16:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 156 proven. 12 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-11-20 06:16:46,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:46,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978503939] [2021-11-20 06:16:46,708 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:16:46,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227674073] [2021-11-20 06:16:46,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227674073] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:16:46,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:16:46,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 24 [2021-11-20 06:16:46,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426162030] [2021-11-20 06:16:46,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:16:46,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 06:16:46,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:46,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 06:16:46,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:16:46,710 INFO L87 Difference]: Start difference. First operand 1590 states and 2069 transitions. Second operand has 24 states, 18 states have (on average 3.0) internal successors, (54), 19 states have internal predecessors, (54), 15 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 12 states have call predecessors, (30), 13 states have call successors, (30) [2021-11-20 06:16:49,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:49,548 INFO L93 Difference]: Finished difference Result 1739 states and 2227 transitions. [2021-11-20 06:16:49,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 06:16:49,549 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 3.0) internal successors, (54), 19 states have internal predecessors, (54), 15 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 12 states have call predecessors, (30), 13 states have call successors, (30) Word has length 130 [2021-11-20 06:16:49,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:49,562 INFO L225 Difference]: With dead ends: 1739 [2021-11-20 06:16:49,562 INFO L226 Difference]: Without dead ends: 1698 [2021-11-20 06:16:49,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=221, Invalid=1185, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 06:16:49,565 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 74 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:49,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 796 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 06:16:49,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-11-20 06:16:50,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1556. [2021-11-20 06:16:50,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1556 states, 978 states have (on average 1.1175869120654396) internal successors, (1093), 987 states have internal predecessors, (1093), 429 states have call successors, (429), 148 states have call predecessors, (429), 148 states have return successors, (428), 420 states have call predecessors, (428), 428 states have call successors, (428) [2021-11-20 06:16:50,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 1950 transitions. [2021-11-20 06:16:50,210 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 1950 transitions. Word has length 130 [2021-11-20 06:16:50,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:50,211 INFO L470 AbstractCegarLoop]: Abstraction has 1556 states and 1950 transitions. [2021-11-20 06:16:50,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 3.0) internal successors, (54), 19 states have internal predecessors, (54), 15 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 12 states have call predecessors, (30), 13 states have call successors, (30) [2021-11-20 06:16:50,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 1950 transitions. [2021-11-20 06:16:50,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-20 06:16:50,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:50,215 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:50,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:16:50,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:16:50,436 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:16:50,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:50,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1962327715, now seen corresponding path program 2 times [2021-11-20 06:16:50,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:50,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034525840] [2021-11-20 06:16:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:50,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:50,452 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:16:50,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966847656] [2021-11-20 06:16:50,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:16:50,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:16:50,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:16:50,460 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:16:50,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 06:16:50,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:16:50,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:16:50,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-20 06:16:50,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:16:52,890 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 132 proven. 192 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2021-11-20 06:16:52,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:16:58,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:58,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034525840] [2021-11-20 06:16:58,638 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:16:58,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966847656] [2021-11-20 06:16:58,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966847656] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:16:58,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:16:58,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-20 06:16:58,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632957455] [2021-11-20 06:16:58,639 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:16:58,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:16:58,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:58,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:16:58,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=295, Unknown=2, NotChecked=0, Total=380 [2021-11-20 06:16:58,641 INFO L87 Difference]: Start difference. First operand 1556 states and 1950 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2021-11-20 06:16:59,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:59,820 INFO L93 Difference]: Finished difference Result 1608 states and 1992 transitions. [2021-11-20 06:16:59,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:16:59,821 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) Word has length 147 [2021-11-20 06:16:59,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:59,831 INFO L225 Difference]: With dead ends: 1608 [2021-11-20 06:16:59,831 INFO L226 Difference]: Without dead ends: 1606 [2021-11-20 06:16:59,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 174 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=115, Invalid=435, Unknown=2, NotChecked=0, Total=552 [2021-11-20 06:16:59,834 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 40 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:59,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 590 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:16:59,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2021-11-20 06:17:00,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1592. [2021-11-20 06:17:00,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1005 states have (on average 1.1134328358208956) internal successors, (1119), 1014 states have internal predecessors, (1119), 429 states have call successors, (429), 157 states have call predecessors, (429), 157 states have return successors, (428), 420 states have call predecessors, (428), 428 states have call successors, (428) [2021-11-20 06:17:00,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1976 transitions. [2021-11-20 06:17:00,324 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1976 transitions. Word has length 147 [2021-11-20 06:17:00,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:17:00,324 INFO L470 AbstractCegarLoop]: Abstraction has 1592 states and 1976 transitions. [2021-11-20 06:17:00,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2021-11-20 06:17:00,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1976 transitions. [2021-11-20 06:17:00,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-20 06:17:00,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:17:00,329 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:17:00,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:17:00,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 06:17:00,552 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:17:00,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:17:00,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1340948421, now seen corresponding path program 3 times [2021-11-20 06:17:00,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:17:00,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524381973] [2021-11-20 06:17:00,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:00,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:17:00,570 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:17:00,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673585885] [2021-11-20 06:17:00,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:17:00,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:17:00,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:17:00,576 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:17:00,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 06:17:01,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:17:01,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:17:01,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-20 06:17:01,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:17:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 132 proven. 69 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2021-11-20 06:17:06,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:17:27,369 WARN L227 SmtUtils]: Spent 10.28s on a formula simplification. DAG size of input: 84 DAG size of output: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:17:36,741 WARN L227 SmtUtils]: Spent 5.15s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:17:37,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:17:37,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524381973] [2021-11-20 06:17:37,054 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:17:37,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673585885] [2021-11-20 06:17:37,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673585885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:17:37,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:17:37,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-20 06:17:37,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457768229] [2021-11-20 06:17:37,055 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:17:37,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:17:37,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:17:37,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:17:37,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=331, Unknown=1, NotChecked=0, Total=420 [2021-11-20 06:17:37,057 INFO L87 Difference]: Start difference. First operand 1592 states and 1976 transitions. Second operand has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-20 06:17:39,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:17:39,894 INFO L93 Difference]: Finished difference Result 1784 states and 2200 transitions. [2021-11-20 06:17:39,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:17:39,897 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 170 [2021-11-20 06:17:39,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:17:39,908 INFO L225 Difference]: With dead ends: 1784 [2021-11-20 06:17:39,909 INFO L226 Difference]: Without dead ends: 1782 [2021-11-20 06:17:39,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=128, Invalid=521, Unknown=1, NotChecked=0, Total=650 [2021-11-20 06:17:39,910 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 35 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:17:39,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 629 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:17:39,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2021-11-20 06:17:40,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1679. [2021-11-20 06:17:40,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1068 states have (on average 1.1067415730337078) internal successors, (1182), 1076 states have internal predecessors, (1182), 445 states have call successors, (445), 165 states have call predecessors, (445), 165 states have return successors, (444), 437 states have call predecessors, (444), 444 states have call successors, (444) [2021-11-20 06:17:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 2071 transitions. [2021-11-20 06:17:40,316 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 2071 transitions. Word has length 170 [2021-11-20 06:17:40,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:17:40,317 INFO L470 AbstractCegarLoop]: Abstraction has 1679 states and 2071 transitions. [2021-11-20 06:17:40,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-20 06:17:40,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 2071 transitions. [2021-11-20 06:17:40,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-20 06:17:40,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:17:40,322 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:17:40,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-20 06:17:40,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 06:17:40,528 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:17:40,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:17:40,529 INFO L85 PathProgramCache]: Analyzing trace with hash -164722535, now seen corresponding path program 4 times [2021-11-20 06:17:40,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:17:40,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426112761] [2021-11-20 06:17:40,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:40,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:17:40,536 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:17:40,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622671704] [2021-11-20 06:17:40,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:17:40,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:17:40,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:17:40,539 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:17:40,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 06:17:42,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:17:42,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:17:42,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-20 06:17:42,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:17:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 238 proven. 235 refuted. 0 times theorem prover too weak. 730 trivial. 0 not checked. [2021-11-20 06:17:47,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:18:02,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:18:02,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426112761] [2021-11-20 06:18:02,757 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:18:02,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622671704] [2021-11-20 06:18:02,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622671704] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:18:02,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:18:02,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-20 06:18:02,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296858273] [2021-11-20 06:18:02,759 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:18:02,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:18:02,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:18:02,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:18:02,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:18:02,761 INFO L87 Difference]: Start difference. First operand 1679 states and 2071 transitions. Second operand has 21 states, 20 states have (on average 2.35) internal successors, (47), 17 states have internal predecessors, (47), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 11 states have call predecessors, (27), 10 states have call successors, (27) [2021-11-20 06:18:06,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:18:06,971 INFO L93 Difference]: Finished difference Result 1823 states and 2260 transitions. [2021-11-20 06:18:06,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:18:06,972 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 17 states have internal predecessors, (47), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 11 states have call predecessors, (27), 10 states have call successors, (27) Word has length 174 [2021-11-20 06:18:06,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:18:06,985 INFO L225 Difference]: With dead ends: 1823 [2021-11-20 06:18:06,986 INFO L226 Difference]: Without dead ends: 1821 [2021-11-20 06:18:06,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 172 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=228, Invalid=1104, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 06:18:06,988 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 56 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:18:06,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 1025 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 06:18:06,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-11-20 06:18:07,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1687. [2021-11-20 06:18:07,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1074 states have (on average 1.106145251396648) internal successors, (1188), 1082 states have internal predecessors, (1188), 445 states have call successors, (445), 167 states have call predecessors, (445), 167 states have return successors, (444), 437 states have call predecessors, (444), 444 states have call successors, (444) [2021-11-20 06:18:07,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 2077 transitions. [2021-11-20 06:18:07,582 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 2077 transitions. Word has length 174 [2021-11-20 06:18:07,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:18:07,583 INFO L470 AbstractCegarLoop]: Abstraction has 1687 states and 2077 transitions. [2021-11-20 06:18:07,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 17 states have internal predecessors, (47), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 11 states have call predecessors, (27), 10 states have call successors, (27) [2021-11-20 06:18:07,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 2077 transitions. [2021-11-20 06:18:07,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-20 06:18:07,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:18:07,588 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:18:07,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 06:18:07,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:18:07,796 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:18:07,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:18:07,796 INFO L85 PathProgramCache]: Analyzing trace with hash 346112797, now seen corresponding path program 5 times [2021-11-20 06:18:07,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:18:07,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926291606] [2021-11-20 06:18:07,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:18:07,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:18:07,803 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:18:07,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207132401] [2021-11-20 06:18:07,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:18:07,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:18:07,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:18:07,807 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:18:07,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6924b786-af10-48d6-b540-11175a936db9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 06:18:08,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-20 06:18:08,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:18:08,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-20 06:18:08,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:18:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 128 proven. 353 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2021-11-20 06:18:16,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:19:15,960 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse10 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse11 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|))) (let ((.cse2 (* 2 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|))) (.cse3 (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|))) (.cse4 (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|))) (.cse5 (* 2 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (.cse6 (* 5 .cse11)) (.cse7 (* 5 .cse10))) (let ((.cse8 (+ .cse4 .cse5 .cse6 .cse7)) (.cse9 (+ .cse2 .cse3)) (.cse1 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|))) (or (= (+ (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (* 5 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (* 5 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (* 2 (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (* 2 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|))) (+ (* 2 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (* 5 .cse0) (* 2 (* |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (* 5 .cse1))) (not (= (+ .cse2 .cse3 (* 5 |c_ULTIMATE.start_main_~b~0#1|)) (+ .cse4 (* 2 |c_ULTIMATE.start_main_~c~0#1|) .cse5 .cse6 .cse7))) (<= (+ |c_ULTIMATE.start_main_~c~0#1| .cse2 .cse3) (+ .cse4 (* 2 |c_ULTIMATE.start_main_~b~0#1|) .cse5 .cse6 .cse7)) (= .cse8 .cse9) (< .cse8 .cse9) (not (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~b~0#1|) .cse10 .cse11) (+ .cse1 |c_ULTIMATE.start_main_~b~0#1| .cse0))))))) is different from true [2021-11-20 06:19:43,173 WARN L227 SmtUtils]: Spent 8.68s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:20:20,160 WARN L227 SmtUtils]: Spent 10.64s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:21:00,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 135 proven. 335 refuted. 5 times theorem prover too weak. 1152 trivial. 6 not checked. [2021-11-20 06:21:00,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:21:00,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926291606] [2021-11-20 06:21:00,246 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:21:00,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207132401] [2021-11-20 06:21:00,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207132401] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:21:00,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:21:00,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-11-20 06:21:00,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035004704] [2021-11-20 06:21:00,247 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:21:00,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 06:21:00,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:21:00,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 06:21:00,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=900, Unknown=12, NotChecked=66, Total=1260 [2021-11-20 06:21:00,249 INFO L87 Difference]: Start difference. First operand 1687 states and 2077 transitions. Second operand has 36 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 30 states have internal predecessors, (81), 22 states have call successors, (64), 2 states have call predecessors, (64), 2 states have return successors, (62), 23 states have call predecessors, (62), 21 states have call successors, (62) [2021-11-20 06:21:01,262 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:21:05,947 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:22:34,535 WARN L227 SmtUtils]: Spent 1.36m on a formula simplification that was a NOOP. DAG size: 163 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:22:37,333 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:23:20,145 WARN L227 SmtUtils]: Spent 35.64s on a formula simplification. DAG size of input: 111 DAG size of output: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:23:22,173 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:23:28,540 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:23:30,739 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:23:32,947 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:23:35,522 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:23:38,050 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:23:39,258 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:23:41,501 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:23:43,869 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:23:46,039 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:25:05,161 WARN L227 SmtUtils]: Spent 1.17m on a formula simplification. DAG size of input: 112 DAG size of output: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:25:07,653 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:25:10,051 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:25:12,696 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:25:57,935 WARN L227 SmtUtils]: Spent 32.79s on a formula simplification that was a NOOP. DAG size: 108 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:25:59,943 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:26:01,956 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:26:05,772 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.61s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:26:07,924 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:26:10,023 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:26:11,124 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:26:18,634 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:27:26,423 WARN L227 SmtUtils]: Spent 1.06m on a formula simplification that was a NOOP. DAG size: 142 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:27:28,431 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:27:30,436 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:27:32,498 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:28:12,582 WARN L227 SmtUtils]: Spent 29.13s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:28:15,579 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:28:17,582 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:28:19,594 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:28:21,657 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse40 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse39 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|))) (let ((.cse28 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse12 (* 2 .cse39)) (.cse13 (* 2 .cse40)) (.cse38 (* |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse36 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse35 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse37 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse34 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse31 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse32 (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse29 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse33 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (let ((.cse20 (* 2 |c_ULTIMATE.start_main_~b~0#1|)) (.cse26 (+ .cse39 .cse40)) (.cse0 (* 2 .cse33)) (.cse16 (* 2 .cse29)) (.cse3 (* 2 .cse32)) (.cse2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse4 (* 2 .cse31)) (.cse1 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse5 (* 2 .cse34)) (.cse6 (* 2 .cse37)) (.cse7 (* 2 .cse35)) (.cse8 (* 2 .cse36)) (.cse11 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse10 (* 2 .cse38)) (.cse9 (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse19 (+ |c_ULTIMATE.start_main_~c~0#1| .cse12 .cse13)) (.cse22 (+ .cse12 .cse13)) (.cse15 (* 2 |c_ULTIMATE.start_main_~c~0#1|)) (.cse25 (* 3 |c_ULTIMATE.start_main_~b~0#1|)) (.cse14 (* 2 .cse28)) (.cse24 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse23 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (and (let ((.cse17 (* 5 .cse24)) (.cse18 (* 5 .cse23))) (let ((.cse21 (+ .cse14 .cse16 .cse17 .cse18))) (or (= (+ .cse0 (* 5 .cse1) (* 5 .cse2) .cse3 .cse4 .cse5) (+ .cse6 .cse7 .cse8 (* 5 .cse9) .cse10 (* 5 .cse11))) (not (= (+ .cse12 .cse13 (* 5 |c_ULTIMATE.start_main_~b~0#1|)) (+ .cse14 .cse15 .cse16 .cse17 .cse18))) (<= .cse19 (+ .cse14 .cse20 .cse16 .cse17 .cse18)) (= .cse21 .cse22) (< .cse21 .cse22)))) (let ((.cse27 (* 2 .cse23)) (.cse30 (* 2 .cse24))) (or (< |c_ULTIMATE.start_main_~c~0#1| .cse20) (<= .cse25 |c_ULTIMATE.start_main_~c~0#1|) (= .cse26 (+ .cse27 .cse28 .cse29 .cse30)) (= (+ .cse31 (* 2 .cse1) (* 2 .cse2) .cse32 .cse33 .cse34) (+ (* 2 .cse9) .cse35 .cse36 .cse37 (* 2 .cse11) .cse38)) (not (= (+ .cse20 .cse39 .cse40) (+ .cse27 |c_ULTIMATE.start_main_~c~0#1| .cse28 .cse29 .cse30))))) (or (<= .cse20 |c_ULTIMATE.start_main_~c~0#1|) (= (+ .cse23 .cse24 .cse28 .cse29) .cse26) (= (+ .cse2 .cse31 .cse32 .cse33 .cse1 .cse34) (+ .cse11 .cse35 .cse36 .cse37 .cse9 .cse38)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~b~0#1|) (not (= (+ |c_ULTIMATE.start_main_~b~0#1| .cse39 .cse40) (+ .cse23 .cse24 |c_ULTIMATE.start_main_~c~0#1| .cse28 .cse29)))) (or (= (+ .cse28 .cse29) .cse26) (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|) (not (= .cse26 (+ |c_ULTIMATE.start_main_~c~0#1| .cse28 .cse29))) (= (+ .cse31 .cse32 .cse33 .cse34) (+ .cse35 .cse36 .cse37 .cse38))) (let ((.cse41 (+ .cse14 .cse23 .cse24 .cse16))) (or (= (+ .cse6 .cse7 .cse8 .cse11 .cse10 .cse9) (+ .cse0 .cse2 .cse3 .cse1 .cse4 .cse5)) (not (= (+ |c_ULTIMATE.start_main_~b~0#1| .cse12 .cse13) (+ .cse14 .cse23 .cse24 .cse15 .cse16))) (<= .cse19 .cse41) (< .cse41 .cse22) (= .cse41 .cse22))) (let ((.cse43 (* 2 (* |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (.cse44 (* 3 .cse23)) (.cse45 (* 3 .cse24))) (let ((.cse42 (+ .cse14 .cse43 .cse44 .cse45))) (or (= (+ (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) .cse3 (* 3 .cse2) .cse4 (* 3 .cse1) .cse5) (+ .cse6 .cse7 .cse8 (* 3 .cse11) .cse10 (* 3 .cse9))) (< .cse42 .cse22) (<= .cse19 (+ .cse14 .cse43 .cse44 |c_ULTIMATE.start_main_~b~0#1| .cse45)) (= .cse42 .cse22) (not (= (+ .cse14 .cse43 .cse44 .cse15 .cse45) (+ .cse25 .cse12 .cse13)))))) (<= |c_ULTIMATE.start_main_~y~0#1| 2147483647))))) is different from true [2021-11-20 06:28:23,748 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:28:27,192 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:28:29,306 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:28:31,808 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:28:33,819 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:28:37,038 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:28:39,398 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:28:41,687 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:28:44,737 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:28:46,739 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []