./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX --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 d8ee33f278cd93a3b1e0d551730c6407889b70e338ebc3c857541220d9b0f75f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:34:59,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:34:59,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:34:59,574 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:34:59,575 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:34:59,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:34:59,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:34:59,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:34:59,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:34:59,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:34:59,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:34:59,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:34:59,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:34:59,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:34:59,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:34:59,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:34:59,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:34:59,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:34:59,614 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:34:59,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:34:59,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:34:59,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:34:59,626 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:34:59,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:34:59,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:34:59,645 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:34:59,645 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:34:59,647 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:34:59,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:34:59,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:34:59,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:34:59,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:34:59,655 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:34:59,656 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:34:59,658 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:34:59,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:34:59,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:34:59,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:34:59,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:34:59,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:34:59,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:34:59,663 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:34:59,715 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:34:59,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:34:59,718 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:34:59,718 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:34:59,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:34:59,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:34:59,721 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:34:59,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:34:59,721 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:34:59,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:34:59,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:34:59,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:34:59,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:34:59,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:34:59,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:34:59,724 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:34:59,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:34:59,725 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:34:59,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:34:59,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:34:59,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:34:59,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:34:59,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:34:59,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:34:59,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:34:59,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:34:59,727 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:34:59,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:34:59,728 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:34:59,730 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:34:59,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:34:59,730 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:34:59,730 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_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8ee33f278cd93a3b1e0d551730c6407889b70e338ebc3c857541220d9b0f75f [2021-11-09 08:35:00,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:35:00,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:35:00,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:35:00,057 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:35:00,057 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:35:00,058 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound10.c [2021-11-09 08:35:00,141 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/data/8a5eb336d/82ea406ac7144d2a81b2a0a3d03202b7/FLAG9f9f538f7 [2021-11-09 08:35:00,603 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:35:00,604 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound10.c [2021-11-09 08:35:00,612 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/data/8a5eb336d/82ea406ac7144d2a81b2a0a3d03202b7/FLAG9f9f538f7 [2021-11-09 08:35:00,983 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/data/8a5eb336d/82ea406ac7144d2a81b2a0a3d03202b7 [2021-11-09 08:35:00,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:35:00,987 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:35:00,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:35:00,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:35:01,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:35:01,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:35:00" (1/1) ... [2021-11-09 08:35:01,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f7fcdbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:01, skipping insertion in model container [2021-11-09 08:35:01,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:35:00" (1/1) ... [2021-11-09 08:35:01,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:35:01,031 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:35:01,192 WARN L228 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_40be467e-d269-4c32-b239-adecf57fac05/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound10.c[597,610] [2021-11-09 08:35:01,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:35:01,254 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:35:01,271 WARN L228 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_40be467e-d269-4c32-b239-adecf57fac05/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound10.c[597,610] [2021-11-09 08:35:01,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:35:01,315 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:35:01,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:01 WrapperNode [2021-11-09 08:35:01,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:35:01,318 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:35:01,319 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:35:01,319 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:35:01,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:01" (1/1) ... [2021-11-09 08:35:01,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:01" (1/1) ... [2021-11-09 08:35:01,366 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:35:01,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:35:01,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:35:01,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:35:01,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:01" (1/1) ... [2021-11-09 08:35:01,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:01" (1/1) ... [2021-11-09 08:35:01,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:01" (1/1) ... [2021-11-09 08:35:01,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:01" (1/1) ... [2021-11-09 08:35:01,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:01" (1/1) ... [2021-11-09 08:35:01,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:01" (1/1) ... [2021-11-09 08:35:01,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:01" (1/1) ... [2021-11-09 08:35:01,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:35:01,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:35:01,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:35:01,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:35:01,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:01" (1/1) ... [2021-11-09 08:35:01,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:35:01,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:01,455 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:35:01,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:35:01,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:35:01,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:35:01,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:35:01,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:35:01,782 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:35:01,783 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-09 08:35:01,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:35:01 BoogieIcfgContainer [2021-11-09 08:35:01,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:35:01,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:35:01,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:35:01,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:35:01,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:35:00" (1/3) ... [2021-11-09 08:35:01,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591ac735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:35:01, skipping insertion in model container [2021-11-09 08:35:01,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:01" (2/3) ... [2021-11-09 08:35:01,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591ac735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:35:01, skipping insertion in model container [2021-11-09 08:35:01,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:35:01" (3/3) ... [2021-11-09 08:35:01,794 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound10.c [2021-11-09 08:35:01,800 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:35:01,800 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-09 08:35:01,852 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:35:01,860 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 [2021-11-09 08:35:01,860 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-09 08:35:01,877 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:01,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-09 08:35:01,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:01,906 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-09 08:35:01,907 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:01,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:01,913 INFO L85 PathProgramCache]: Analyzing trace with hash 890461031, now seen corresponding path program 1 times [2021-11-09 08:35:01,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:01,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694127276] [2021-11-09 08:35:01,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:01,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:02,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:02,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694127276] [2021-11-09 08:35:02,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694127276] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:35:02,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:35:02,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:35:02,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206300049] [2021-11-09 08:35:02,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 08:35:02,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:02,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 08:35:02,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:35:02,193 INFO L87 Difference]: Start difference. First operand has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:02,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:02,209 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2021-11-09 08:35:02,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 08:35:02,211 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-09 08:35:02,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:02,220 INFO L225 Difference]: With dead ends: 34 [2021-11-09 08:35:02,220 INFO L226 Difference]: Without dead ends: 14 [2021-11-09 08:35:02,223 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:35:02,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-09 08:35:02,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-09 08:35:02,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:02,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-09 08:35:02,274 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2021-11-09 08:35:02,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:02,274 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-09 08:35:02,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:02,275 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-09 08:35:02,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-09 08:35:02,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:02,276 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-09 08:35:02,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:35:02,277 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:02,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:02,278 INFO L85 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-11-09 08:35:02,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:02,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28867998] [2021-11-09 08:35:02,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:02,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:02,303 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:02,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627703350] [2021-11-09 08:35:02,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:02,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:02,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:02,321 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:02,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:35:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:02,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:35:02,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:02,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:02,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28867998] [2021-11-09 08:35:02,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:02,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627703350] [2021-11-09 08:35:02,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627703350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:35:02,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:35:02,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:35:02,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636613952] [2021-11-09 08:35:02,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:35:02,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:02,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:35:02,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:35:02,562 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:02,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:02,650 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-11-09 08:35:02,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:35:02,651 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-09 08:35:02,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:02,652 INFO L225 Difference]: With dead ends: 30 [2021-11-09 08:35:02,653 INFO L226 Difference]: Without dead ends: 23 [2021-11-09 08:35:02,654 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:35:02,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-09 08:35:02,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2021-11-09 08:35:02,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:02,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-11-09 08:35:02,664 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2021-11-09 08:35:02,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:02,665 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-11-09 08:35:02,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:02,666 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-11-09 08:35:02,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 08:35:02,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:02,668 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:02,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:02,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-09 08:35:02,870 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:02,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:02,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1545533000, now seen corresponding path program 1 times [2021-11-09 08:35:02,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:02,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475412402] [2021-11-09 08:35:02,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:02,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:02,888 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:02,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324854252] [2021-11-09 08:35:02,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:02,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:02,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:02,890 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:02,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:35:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:02,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 08:35:02,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:03,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:03,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475412402] [2021-11-09 08:35:03,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:03,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324854252] [2021-11-09 08:35:03,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324854252] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:03,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:03,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 08:35:03,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919969890] [2021-11-09 08:35:03,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:35:03,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:03,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:35:03,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:35:03,295 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:03,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:03,419 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-11-09 08:35:03,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:35:03,419 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-09 08:35:03,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:03,420 INFO L225 Difference]: With dead ends: 35 [2021-11-09 08:35:03,421 INFO L226 Difference]: Without dead ends: 33 [2021-11-09 08:35:03,421 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:35:03,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-09 08:35:03,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-11-09 08:35:03,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:03,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-09 08:35:03,426 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-11-09 08:35:03,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:03,426 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-09 08:35:03,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:03,427 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-09 08:35:03,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 08:35:03,428 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:03,428 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:03,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:03,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:03,651 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:03,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:03,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1602791302, now seen corresponding path program 1 times [2021-11-09 08:35:03,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:03,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973282006] [2021-11-09 08:35:03,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:03,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:03,675 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:03,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019051305] [2021-11-09 08:35:03,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:03,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:03,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:03,677 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:03,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:35:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:03,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 08:35:03,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:03,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:03,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973282006] [2021-11-09 08:35:03,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:03,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019051305] [2021-11-09 08:35:03,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019051305] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:03,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:03,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 08:35:03,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993291380] [2021-11-09 08:35:03,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:35:03,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:03,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:35:03,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:35:03,919 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:04,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:04,016 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-11-09 08:35:04,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:35:04,017 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-09 08:35:04,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:04,018 INFO L225 Difference]: With dead ends: 39 [2021-11-09 08:35:04,019 INFO L226 Difference]: Without dead ends: 33 [2021-11-09 08:35:04,019 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:35:04,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-09 08:35:04,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-11-09 08:35:04,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:04,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-09 08:35:04,025 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 12 [2021-11-09 08:35:04,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:04,026 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-09 08:35:04,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:04,026 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-09 08:35:04,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 08:35:04,027 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:04,027 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:04,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:04,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:04,254 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:04,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:04,254 INFO L85 PathProgramCache]: Analyzing trace with hash -666919436, now seen corresponding path program 1 times [2021-11-09 08:35:04,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:04,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525519259] [2021-11-09 08:35:04,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:04,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:04,272 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:04,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566876287] [2021-11-09 08:35:04,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:04,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:04,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:04,274 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:04,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:35:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:04,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:35:04,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:04,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:04,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525519259] [2021-11-09 08:35:04,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:04,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566876287] [2021-11-09 08:35:04,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566876287] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:04,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:04,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-11-09 08:35:04,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764753237] [2021-11-09 08:35:04,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:35:04,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:04,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:35:04,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:35:04,433 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:04,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:04,455 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-11-09 08:35:04,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:35:04,455 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-09 08:35:04,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:04,456 INFO L225 Difference]: With dead ends: 32 [2021-11-09 08:35:04,456 INFO L226 Difference]: Without dead ends: 28 [2021-11-09 08:35:04,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:35:04,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-09 08:35:04,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-09 08:35:04,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:04,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-11-09 08:35:04,461 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 13 [2021-11-09 08:35:04,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:04,462 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-11-09 08:35:04,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:04,462 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-11-09 08:35:04,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 08:35:04,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:04,463 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:04,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:04,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:04,690 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:04,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:04,690 INFO L85 PathProgramCache]: Analyzing trace with hash -919296115, now seen corresponding path program 1 times [2021-11-09 08:35:04,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:04,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499239075] [2021-11-09 08:35:04,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:04,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:04,705 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:04,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647152755] [2021-11-09 08:35:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:04,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:04,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:04,707 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:04,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:35:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:04,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 08:35:04,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:05,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:05,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499239075] [2021-11-09 08:35:05,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:05,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647152755] [2021-11-09 08:35:05,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647152755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:05,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:05,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 08:35:05,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986273622] [2021-11-09 08:35:05,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:35:05,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:05,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:35:05,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:35:05,189 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:05,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:05,328 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-11-09 08:35:05,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:35:05,329 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-09 08:35:05,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:05,329 INFO L225 Difference]: With dead ends: 38 [2021-11-09 08:35:05,330 INFO L226 Difference]: Without dead ends: 34 [2021-11-09 08:35:05,330 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:35:05,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-09 08:35:05,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2021-11-09 08:35:05,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:05,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-09 08:35:05,339 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2021-11-09 08:35:05,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:05,340 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-09 08:35:05,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:05,340 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-09 08:35:05,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 08:35:05,342 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:05,342 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-09 08:35:05,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:05,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:05,566 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:05,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:05,566 INFO L85 PathProgramCache]: Analyzing trace with hash -443375322, now seen corresponding path program 2 times [2021-11-09 08:35:05,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:05,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559178074] [2021-11-09 08:35:05,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:05,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:05,579 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:05,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260172288] [2021-11-09 08:35:05,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:35:05,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:05,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:05,581 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:05,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:35:05,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:35:05,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:05,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 08:35:05,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:06,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:06,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559178074] [2021-11-09 08:35:06,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:06,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260172288] [2021-11-09 08:35:06,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260172288] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:06,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:06,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 08:35:06,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93964432] [2021-11-09 08:35:06,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:35:06,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:06,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:35:06,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:35:06,024 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:06,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:06,218 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-11-09 08:35:06,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:35:06,220 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-09 08:35:06,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:06,221 INFO L225 Difference]: With dead ends: 46 [2021-11-09 08:35:06,221 INFO L226 Difference]: Without dead ends: 44 [2021-11-09 08:35:06,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:35:06,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-09 08:35:06,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2021-11-09 08:35:06,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:06,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-11-09 08:35:06,228 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2021-11-09 08:35:06,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:06,228 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-11-09 08:35:06,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:06,229 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-11-09 08:35:06,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 08:35:06,234 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:06,234 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:06,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-09 08:35:06,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:06,454 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:06,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:06,454 INFO L85 PathProgramCache]: Analyzing trace with hash -500633624, now seen corresponding path program 1 times [2021-11-09 08:35:06,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:06,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94185876] [2021-11-09 08:35:06,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:06,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:06,467 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:06,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549780526] [2021-11-09 08:35:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:06,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:06,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:06,469 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:06,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:35:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:06,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 08:35:06,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:07,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:07,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94185876] [2021-11-09 08:35:07,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:07,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549780526] [2021-11-09 08:35:07,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549780526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:07,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:07,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-09 08:35:07,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629983421] [2021-11-09 08:35:07,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:35:07,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:07,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:35:07,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:35:07,305 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:08,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:08,018 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-11-09 08:35:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:35:08,019 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-09 08:35:08,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:08,020 INFO L225 Difference]: With dead ends: 60 [2021-11-09 08:35:08,020 INFO L226 Difference]: Without dead ends: 48 [2021-11-09 08:35:08,021 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:35:08,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-09 08:35:08,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-11-09 08:35:08,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:08,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-11-09 08:35:08,028 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 18 [2021-11-09 08:35:08,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:08,033 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-11-09 08:35:08,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:08,034 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-11-09 08:35:08,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 08:35:08,035 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:08,035 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:08,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:08,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-09 08:35:08,261 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:08,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:08,262 INFO L85 PathProgramCache]: Analyzing trace with hash -701540760, now seen corresponding path program 2 times [2021-11-09 08:35:08,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:08,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609583194] [2021-11-09 08:35:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:08,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:08,287 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:08,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183692945] [2021-11-09 08:35:08,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:35:08,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:08,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:08,293 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:08,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:35:08,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:35:08,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:08,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 08:35:08,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:08,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:08,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609583194] [2021-11-09 08:35:08,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:08,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183692945] [2021-11-09 08:35:08,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183692945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:08,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:08,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 08:35:08,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972142483] [2021-11-09 08:35:08,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:35:08,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:08,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:35:08,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:35:08,686 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:08,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:08,857 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-11-09 08:35:08,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:35:08,858 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-09 08:35:08,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:08,860 INFO L225 Difference]: With dead ends: 57 [2021-11-09 08:35:08,860 INFO L226 Difference]: Without dead ends: 55 [2021-11-09 08:35:08,861 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:35:08,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-09 08:35:08,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2021-11-09 08:35:08,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:08,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-11-09 08:35:08,868 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 18 [2021-11-09 08:35:08,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:08,868 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-11-09 08:35:08,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:08,868 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-11-09 08:35:08,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 08:35:08,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:08,869 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-09 08:35:08,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:09,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:09,070 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:09,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:09,071 INFO L85 PathProgramCache]: Analyzing trace with hash -758799062, now seen corresponding path program 2 times [2021-11-09 08:35:09,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:09,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60120769] [2021-11-09 08:35:09,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:09,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:09,085 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:09,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415869567] [2021-11-09 08:35:09,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:35:09,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:09,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:09,087 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:09,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:35:09,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:35:09,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:09,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 08:35:09,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:09,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:09,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60120769] [2021-11-09 08:35:09,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:09,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415869567] [2021-11-09 08:35:09,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415869567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:09,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:09,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-09 08:35:09,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662747767] [2021-11-09 08:35:09,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:35:09,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:09,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:35:09,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:35:09,635 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:10,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:10,006 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-11-09 08:35:10,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:35:10,006 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-09 08:35:10,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:10,007 INFO L225 Difference]: With dead ends: 60 [2021-11-09 08:35:10,007 INFO L226 Difference]: Without dead ends: 54 [2021-11-09 08:35:10,008 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:35:10,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-09 08:35:10,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2021-11-09 08:35:10,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:10,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-11-09 08:35:10,015 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 18 [2021-11-09 08:35:10,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:10,015 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-11-09 08:35:10,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:10,016 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-11-09 08:35:10,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 08:35:10,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:10,017 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:10,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:10,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 08:35:10,233 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:10,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:10,234 INFO L85 PathProgramCache]: Analyzing trace with hash -859769786, now seen corresponding path program 2 times [2021-11-09 08:35:10,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:10,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281963407] [2021-11-09 08:35:10,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:10,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:10,250 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:10,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431967245] [2021-11-09 08:35:10,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:35:10,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:10,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:10,252 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:10,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 08:35:10,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:35:10,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:10,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:35:10,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:10,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:10,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281963407] [2021-11-09 08:35:10,497 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:10,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431967245] [2021-11-09 08:35:10,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431967245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:10,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:10,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-09 08:35:10,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472830460] [2021-11-09 08:35:10,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:35:10,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:10,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:35:10,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:35:10,499 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:10,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:10,528 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-11-09 08:35:10,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:35:10,528 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-09 08:35:10,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:10,529 INFO L225 Difference]: With dead ends: 50 [2021-11-09 08:35:10,529 INFO L226 Difference]: Without dead ends: 46 [2021-11-09 08:35:10,529 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:35:10,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-09 08:35:10,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-09 08:35:10,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:10,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-11-09 08:35:10,536 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 19 [2021-11-09 08:35:10,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:10,536 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-11-09 08:35:10,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:10,536 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-11-09 08:35:10,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 08:35:10,537 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:10,537 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:10,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:10,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 08:35:10,765 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:10,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:10,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1564888737, now seen corresponding path program 2 times [2021-11-09 08:35:10,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:10,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570873957] [2021-11-09 08:35:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:10,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:10,776 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:10,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322832186] [2021-11-09 08:35:10,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:35:10,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:10,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:10,777 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:10,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 08:35:11,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:35:11,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:11,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 08:35:11,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:11,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:11,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570873957] [2021-11-09 08:35:11,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:11,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322832186] [2021-11-09 08:35:11,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322832186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:11,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:11,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-09 08:35:11,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797006021] [2021-11-09 08:35:11,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:35:11,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:11,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:35:11,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:35:11,439 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:11,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:11,730 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-11-09 08:35:11,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:35:11,731 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-09 08:35:11,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:11,732 INFO L225 Difference]: With dead ends: 61 [2021-11-09 08:35:11,732 INFO L226 Difference]: Without dead ends: 57 [2021-11-09 08:35:11,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:35:11,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-09 08:35:11,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-11-09 08:35:11,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:11,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-11-09 08:35:11,740 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 21 [2021-11-09 08:35:11,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:11,740 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-11-09 08:35:11,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:11,741 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-11-09 08:35:11,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 08:35:11,742 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:11,742 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:11,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:11,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:11,950 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:11,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:11,950 INFO L85 PathProgramCache]: Analyzing trace with hash -285025059, now seen corresponding path program 1 times [2021-11-09 08:35:11,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:11,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806114524] [2021-11-09 08:35:11,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:11,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:11,961 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:11,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802009329] [2021-11-09 08:35:11,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:11,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:11,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:11,963 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:11,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 08:35:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:12,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:35:12,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:12,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:12,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806114524] [2021-11-09 08:35:12,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:12,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802009329] [2021-11-09 08:35:12,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802009329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:12,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:12,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 08:35:12,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3581216] [2021-11-09 08:35:12,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:35:12,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:12,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:35:12,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:35:12,395 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:12,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:12,615 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-11-09 08:35:12,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:35:12,616 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-09 08:35:12,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:12,616 INFO L225 Difference]: With dead ends: 53 [2021-11-09 08:35:12,616 INFO L226 Difference]: Without dead ends: 49 [2021-11-09 08:35:12,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:35:12,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-09 08:35:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2021-11-09 08:35:12,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.175) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:12,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-11-09 08:35:12,623 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 21 [2021-11-09 08:35:12,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:12,623 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-11-09 08:35:12,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:12,623 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-11-09 08:35:12,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 08:35:12,624 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:12,624 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2021-11-09 08:35:12,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:12,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:12,849 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:12,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:12,850 INFO L85 PathProgramCache]: Analyzing trace with hash -429625836, now seen corresponding path program 3 times [2021-11-09 08:35:12,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:12,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999592445] [2021-11-09 08:35:12,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:12,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:12,861 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:12,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787496697] [2021-11-09 08:35:12,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:35:12,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:12,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:12,862 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:12,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 08:35:13,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 08:35:13,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:13,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 08:35:13,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 08:35:13,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:13,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999592445] [2021-11-09 08:35:13,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:13,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787496697] [2021-11-09 08:35:13,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787496697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:13,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:13,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 08:35:13,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570607850] [2021-11-09 08:35:13,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:35:13,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:13,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:35:13,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:35:13,848 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:14,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:14,146 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-11-09 08:35:14,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:35:14,147 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-09 08:35:14,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:14,147 INFO L225 Difference]: With dead ends: 64 [2021-11-09 08:35:14,147 INFO L226 Difference]: Without dead ends: 62 [2021-11-09 08:35:14,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:35:14,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-09 08:35:14,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2021-11-09 08:35:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:14,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-11-09 08:35:14,160 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 24 [2021-11-09 08:35:14,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:14,161 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-11-09 08:35:14,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:14,161 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-11-09 08:35:14,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 08:35:14,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:14,162 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2021-11-09 08:35:14,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-09 08:35:14,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:14,365 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:14,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:14,366 INFO L85 PathProgramCache]: Analyzing trace with hash -486884138, now seen corresponding path program 3 times [2021-11-09 08:35:14,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:14,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236982190] [2021-11-09 08:35:14,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:14,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:14,388 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:14,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860535291] [2021-11-09 08:35:14,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:35:14,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:14,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:14,399 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:14,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 08:35:14,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 08:35:14,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:14,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 08:35:14,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 08:35:14,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:14,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236982190] [2021-11-09 08:35:14,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:14,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860535291] [2021-11-09 08:35:14,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860535291] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:14,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:14,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 08:35:14,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440602492] [2021-11-09 08:35:14,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:35:14,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:14,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:35:14,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:35:14,769 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:14,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:14,845 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-11-09 08:35:14,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:35:14,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-09 08:35:14,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:14,846 INFO L225 Difference]: With dead ends: 47 [2021-11-09 08:35:14,846 INFO L226 Difference]: Without dead ends: 45 [2021-11-09 08:35:14,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:35:14,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-09 08:35:14,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-11-09 08:35:14,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:14,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-11-09 08:35:14,855 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 24 [2021-11-09 08:35:14,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:14,855 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-11-09 08:35:14,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:14,855 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-11-09 08:35:14,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 08:35:14,856 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:14,856 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:14,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:15,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 08:35:15,077 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:15,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:15,078 INFO L85 PathProgramCache]: Analyzing trace with hash -433535720, now seen corresponding path program 3 times [2021-11-09 08:35:15,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:15,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349257635] [2021-11-09 08:35:15,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:15,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:15,099 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:15,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37490791] [2021-11-09 08:35:15,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:35:15,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:15,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:15,101 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:15,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 08:35:15,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:35:15,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:15,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 08:35:15,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:15,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:15,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349257635] [2021-11-09 08:35:15,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:15,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37490791] [2021-11-09 08:35:15,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37490791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:15,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:15,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 08:35:15,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106727325] [2021-11-09 08:35:15,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:35:15,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:15,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:35:15,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:35:15,424 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:15,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:15,459 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-11-09 08:35:15,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:35:15,459 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-09 08:35:15,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:15,461 INFO L225 Difference]: With dead ends: 48 [2021-11-09 08:35:15,461 INFO L226 Difference]: Without dead ends: 44 [2021-11-09 08:35:15,461 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:35:15,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-09 08:35:15,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-09 08:35:15,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:15,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-11-09 08:35:15,467 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 25 [2021-11-09 08:35:15,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:15,467 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-11-09 08:35:15,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:15,468 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-11-09 08:35:15,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 08:35:15,470 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:15,470 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:15,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:15,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 08:35:15,673 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:15,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:15,674 INFO L85 PathProgramCache]: Analyzing trace with hash 24155569, now seen corresponding path program 3 times [2021-11-09 08:35:15,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:15,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11925593] [2021-11-09 08:35:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:15,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:15,683 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:15,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267231057] [2021-11-09 08:35:15,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:35:15,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:15,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:15,685 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:15,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 08:35:16,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 08:35:16,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:16,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 08:35:16,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-09 08:35:16,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:16,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11925593] [2021-11-09 08:35:16,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:16,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267231057] [2021-11-09 08:35:16,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267231057] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:35:16,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:35:16,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 08:35:16,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668501523] [2021-11-09 08:35:16,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:35:16,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:16,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:35:16,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:35:16,481 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:16,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:16,706 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-11-09 08:35:16,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:35:16,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-09 08:35:16,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:16,708 INFO L225 Difference]: With dead ends: 48 [2021-11-09 08:35:16,708 INFO L226 Difference]: Without dead ends: 44 [2021-11-09 08:35:16,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:35:16,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-09 08:35:16,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-09 08:35:16,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:16,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-11-09 08:35:16,714 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 27 [2021-11-09 08:35:16,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:16,714 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-11-09 08:35:16,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:16,714 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-11-09 08:35:16,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 08:35:16,715 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:16,716 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:16,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:16,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 08:35:16,916 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:16,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:16,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1957613462, now seen corresponding path program 4 times [2021-11-09 08:35:16,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:16,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607537717] [2021-11-09 08:35:16,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:16,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:16,930 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:16,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449664292] [2021-11-09 08:35:16,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:35:16,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:16,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:16,932 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:16,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 08:35:17,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:35:17,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:17,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 08:35:17,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:17,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:17,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607537717] [2021-11-09 08:35:17,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:17,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449664292] [2021-11-09 08:35:17,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449664292] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:17,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:17,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 08:35:17,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206534443] [2021-11-09 08:35:17,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:35:17,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:17,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:35:17,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:35:17,287 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:17,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:17,353 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-11-09 08:35:17,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:35:17,354 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-09 08:35:17,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:17,355 INFO L225 Difference]: With dead ends: 54 [2021-11-09 08:35:17,355 INFO L226 Difference]: Without dead ends: 50 [2021-11-09 08:35:17,355 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:35:17,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-09 08:35:17,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-09 08:35:17,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:17,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-11-09 08:35:17,376 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 31 [2021-11-09 08:35:17,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:17,376 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-11-09 08:35:17,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:17,377 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-11-09 08:35:17,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 08:35:17,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:17,377 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:17,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:17,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 08:35:17,602 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:17,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:17,602 INFO L85 PathProgramCache]: Analyzing trace with hash -553888196, now seen corresponding path program 5 times [2021-11-09 08:35:17,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:17,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899680307] [2021-11-09 08:35:17,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:17,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:17,610 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:17,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747312952] [2021-11-09 08:35:17,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:35:17,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:17,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:17,619 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:17,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 08:35:17,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 08:35:17,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:17,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:35:17,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:17,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:17,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899680307] [2021-11-09 08:35:17,996 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:17,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747312952] [2021-11-09 08:35:17,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747312952] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:17,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:17,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 08:35:17,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605986504] [2021-11-09 08:35:17,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:35:17,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:18,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:35:18,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:35:18,000 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:18,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:18,050 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2021-11-09 08:35:18,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:35:18,051 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 08:35:18,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:18,052 INFO L225 Difference]: With dead ends: 60 [2021-11-09 08:35:18,052 INFO L226 Difference]: Without dead ends: 56 [2021-11-09 08:35:18,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:35:18,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-09 08:35:18,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-09 08:35:18,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:18,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-11-09 08:35:18,058 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 37 [2021-11-09 08:35:18,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:18,059 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-11-09 08:35:18,059 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:18,059 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-11-09 08:35:18,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 08:35:18,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:18,060 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:18,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:18,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:18,274 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:18,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:18,274 INFO L85 PathProgramCache]: Analyzing trace with hash 835999374, now seen corresponding path program 6 times [2021-11-09 08:35:18,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:18,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225285037] [2021-11-09 08:35:18,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:18,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:18,283 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:18,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153773791] [2021-11-09 08:35:18,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:35:18,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:18,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:18,293 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:18,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 08:35:18,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 08:35:18,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:18,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 08:35:18,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:18,920 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:18,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:18,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225285037] [2021-11-09 08:35:18,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:18,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153773791] [2021-11-09 08:35:18,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153773791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:18,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:18,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 08:35:18,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843387671] [2021-11-09 08:35:18,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:35:18,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:18,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:35:18,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:35:18,923 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:18,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:18,993 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2021-11-09 08:35:18,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 08:35:18,994 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-09 08:35:18,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:18,995 INFO L225 Difference]: With dead ends: 66 [2021-11-09 08:35:18,995 INFO L226 Difference]: Without dead ends: 62 [2021-11-09 08:35:18,995 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:35:18,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-09 08:35:19,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-09 08:35:19,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:19,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-11-09 08:35:19,001 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 43 [2021-11-09 08:35:19,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:19,002 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-11-09 08:35:19,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:19,002 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-11-09 08:35:19,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 08:35:19,003 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:19,003 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:19,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:19,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:19,203 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:19,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:19,204 INFO L85 PathProgramCache]: Analyzing trace with hash -194293408, now seen corresponding path program 7 times [2021-11-09 08:35:19,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:19,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340277577] [2021-11-09 08:35:19,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:19,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:19,211 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:19,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275464357] [2021-11-09 08:35:19,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:35:19,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:19,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:19,215 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:19,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 08:35:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:19,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 08:35:19,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:19,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:19,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340277577] [2021-11-09 08:35:19,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:19,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275464357] [2021-11-09 08:35:19,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275464357] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:19,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:19,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-09 08:35:19,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772562273] [2021-11-09 08:35:19,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:35:19,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:19,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:35:19,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:35:19,697 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:19,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:19,794 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-11-09 08:35:19,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:35:19,795 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-09 08:35:19,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:19,796 INFO L225 Difference]: With dead ends: 72 [2021-11-09 08:35:19,796 INFO L226 Difference]: Without dead ends: 68 [2021-11-09 08:35:19,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:35:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-09 08:35:19,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-09 08:35:19,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 67 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:19,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2021-11-09 08:35:19,805 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 49 [2021-11-09 08:35:19,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:19,805 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2021-11-09 08:35:19,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:19,806 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2021-11-09 08:35:19,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 08:35:19,807 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:19,807 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:19,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:20,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:20,033 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:20,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:20,034 INFO L85 PathProgramCache]: Analyzing trace with hash 691758770, now seen corresponding path program 8 times [2021-11-09 08:35:20,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:20,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328380426] [2021-11-09 08:35:20,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:20,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:20,042 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:20,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092831054] [2021-11-09 08:35:20,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:35:20,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:20,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:20,063 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:20,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 08:35:20,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:35:20,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:20,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 08:35:20,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:20,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:20,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328380426] [2021-11-09 08:35:20,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:20,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092831054] [2021-11-09 08:35:20,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092831054] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:20,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:20,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 08:35:20,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587856515] [2021-11-09 08:35:20,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:35:20,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:20,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:35:20,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:35:20,580 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:20,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:20,707 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2021-11-09 08:35:20,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 08:35:20,708 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-09 08:35:20,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:20,709 INFO L225 Difference]: With dead ends: 78 [2021-11-09 08:35:20,709 INFO L226 Difference]: Without dead ends: 74 [2021-11-09 08:35:20,712 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:35:20,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-09 08:35:20,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-09 08:35:20,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 73 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:20,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-11-09 08:35:20,721 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 55 [2021-11-09 08:35:20,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:20,721 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-11-09 08:35:20,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:20,722 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-11-09 08:35:20,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 08:35:20,723 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:20,723 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:20,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:20,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:20,937 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:20,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:20,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1453766276, now seen corresponding path program 9 times [2021-11-09 08:35:20,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:20,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765808024] [2021-11-09 08:35:20,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:20,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:20,950 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:20,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704905168] [2021-11-09 08:35:20,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:35:20,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:20,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:20,952 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:20,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 08:35:21,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-09 08:35:21,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:21,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 08:35:21,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:21,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:21,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765808024] [2021-11-09 08:35:21,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:21,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704905168] [2021-11-09 08:35:21,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704905168] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:21,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:21,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-09 08:35:21,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276857151] [2021-11-09 08:35:21,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:35:21,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:21,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:35:21,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:35:21,815 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:21,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:21,938 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2021-11-09 08:35:21,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 08:35:21,939 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-09 08:35:21,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:21,939 INFO L225 Difference]: With dead ends: 84 [2021-11-09 08:35:21,940 INFO L226 Difference]: Without dead ends: 80 [2021-11-09 08:35:21,940 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:35:21,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-09 08:35:21,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-09 08:35:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 79 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-11-09 08:35:21,949 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 61 [2021-11-09 08:35:21,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:21,949 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-11-09 08:35:21,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:21,950 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-11-09 08:35:21,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 08:35:21,950 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:21,951 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:21,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:22,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 08:35:22,157 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:22,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:22,157 INFO L85 PathProgramCache]: Analyzing trace with hash -118005546, now seen corresponding path program 10 times [2021-11-09 08:35:22,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:22,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796840949] [2021-11-09 08:35:22,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:22,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:22,167 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:22,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272034765] [2021-11-09 08:35:22,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:35:22,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:22,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:22,169 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:22,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 08:35:22,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:35:22,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-09 08:35:22,887 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:35:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:35:23,018 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:35:23,018 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-09 08:35:23,019 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 08:35:23,021 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 08:35:23,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:23,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 08:35:23,231 INFO L731 BasicCegarLoop]: Path program histogram: [10, 3, 3, 3, 2, 1, 1, 1] [2021-11-09 08:35:23,235 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-09 08:35:23,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 08:35:23 BoogieIcfgContainer [2021-11-09 08:35:23,313 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-09 08:35:23,313 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-09 08:35:23,314 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-09 08:35:23,314 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-09 08:35:23,314 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:35:01" (3/4) ... [2021-11-09 08:35:23,316 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-09 08:35:23,398 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/witness.graphml [2021-11-09 08:35:23,398 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-09 08:35:23,400 INFO L168 Benchmark]: Toolchain (without parser) took 22411.88 ms. Allocated memory was 92.3 MB in the beginning and 142.6 MB in the end (delta: 50.3 MB). Free memory was 58.1 MB in the beginning and 64.7 MB in the end (delta: -6.6 MB). Peak memory consumption was 43.4 MB. Max. memory is 16.1 GB. [2021-11-09 08:35:23,400 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 92.3 MB. Free memory was 64.4 MB in the beginning and 64.3 MB in the end (delta: 33.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 08:35:23,401 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.30 ms. Allocated memory is still 92.3 MB. Free memory was 58.1 MB in the beginning and 68.4 MB in the end (delta: -10.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-09 08:35:23,401 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.58 ms. Allocated memory is still 92.3 MB. Free memory was 68.4 MB in the beginning and 67.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 08:35:23,402 INFO L168 Benchmark]: Boogie Preprocessor took 46.45 ms. Allocated memory is still 92.3 MB. Free memory was 66.7 MB in the beginning and 65.9 MB in the end (delta: 819.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 08:35:23,402 INFO L168 Benchmark]: RCFGBuilder took 370.52 ms. Allocated memory is still 92.3 MB. Free memory was 65.9 MB in the beginning and 56.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 08:35:23,403 INFO L168 Benchmark]: TraceAbstraction took 21526.19 ms. Allocated memory was 92.3 MB in the beginning and 142.6 MB in the end (delta: 50.3 MB). Free memory was 55.4 MB in the beginning and 71.0 MB in the end (delta: -15.6 MB). Peak memory consumption was 37.9 MB. Max. memory is 16.1 GB. [2021-11-09 08:35:23,403 INFO L168 Benchmark]: Witness Printer took 85.16 ms. Allocated memory is still 142.6 MB. Free memory was 71.0 MB in the beginning and 64.7 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-09 08:35:23,406 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 92.3 MB. Free memory was 64.4 MB in the beginning and 64.3 MB in the end (delta: 33.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 328.30 ms. Allocated memory is still 92.3 MB. Free memory was 58.1 MB in the beginning and 68.4 MB in the end (delta: -10.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.58 ms. Allocated memory is still 92.3 MB. Free memory was 68.4 MB in the beginning and 67.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.45 ms. Allocated memory is still 92.3 MB. Free memory was 66.7 MB in the beginning and 65.9 MB in the end (delta: 819.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 370.52 ms. Allocated memory is still 92.3 MB. Free memory was 65.9 MB in the beginning and 56.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 21526.19 ms. Allocated memory was 92.3 MB in the beginning and 142.6 MB in the end (delta: 50.3 MB). Free memory was 55.4 MB in the beginning and 71.0 MB in the end (delta: -15.6 MB). Peak memory consumption was 37.9 MB. Max. memory is 16.1 GB. * Witness Printer took 85.16 ms. Allocated memory is still 142.6 MB. Free memory was 71.0 MB in the beginning and 64.7 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] int counter = 0; VAL [counter=0] [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 VAL [counter=0] [L31] EXPR counter++ VAL [counter=1] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(x <= X)) VAL [counter=1] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=1] [L45] x++ VAL [counter=1] [L31] EXPR counter++ VAL [counter=2] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=2] [L35] COND FALSE !(!(x <= X)) VAL [counter=2] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=2] [L45] x++ VAL [counter=2] [L31] EXPR counter++ VAL [counter=3] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=3] [L35] COND FALSE !(!(x <= X)) VAL [counter=3] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=3] [L45] x++ VAL [counter=3] [L31] EXPR counter++ VAL [counter=4] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=4] [L35] COND FALSE !(!(x <= X)) VAL [counter=4] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=4] [L45] x++ VAL [counter=4] [L31] EXPR counter++ VAL [counter=5] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=5] [L35] COND FALSE !(!(x <= X)) VAL [counter=5] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=5] [L45] x++ VAL [counter=5] [L31] EXPR counter++ VAL [counter=6] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=6] [L35] COND FALSE !(!(x <= X)) VAL [counter=6] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=6] [L45] x++ VAL [counter=6] [L31] EXPR counter++ VAL [counter=7] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=7] [L35] COND FALSE !(!(x <= X)) VAL [counter=7] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=7] [L45] x++ VAL [counter=7] [L31] EXPR counter++ VAL [counter=8] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=8] [L35] COND FALSE !(!(x <= X)) VAL [counter=8] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=8] [L45] x++ VAL [counter=8] [L31] EXPR counter++ VAL [counter=9] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=9] [L35] COND FALSE !(!(x <= X)) VAL [counter=9] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=9] [L45] x++ VAL [counter=9] [L31] EXPR counter++ VAL [counter=10] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=10] [L35] COND FALSE !(!(x <= X)) VAL [counter=10] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=10] [L45] x++ VAL [counter=10] [L31] EXPR counter++ VAL [counter=11] [L31] COND FALSE !(counter++<10) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x [L14] COND TRUE !(cond) VAL [counter=11] [L16] reach_error() VAL [counter=11] - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 21.3s, OverallIterations: 24, TraceHistogramMax: 11, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 294 SDtfs, 303 SDslu, 1107 SDs, 0 SdLazy, 1310 SolverSat, 134 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 652 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=23, InterpolantAutomatonStates: 251, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 23 MinimizatonAttempts, 109 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 5.3s InterpolantComputationTime, 640 NumberOfCodeBlocks, 604 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 3646 SizeOfPredicates, 182 NumberOfNonLiveVariables, 2798 ConjunctsInSsa, 431 ConjunctsInUnsatCore, 23 InterpolantComputations, 3 PerfectInterpolantSequences, 82/980 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-09 08:35:23,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40be467e-d269-4c32-b239-adecf57fac05/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE