./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be --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 0bb6ea6333d2c4e133ad252fe2bcbc17b832f383e2bb5defb402851de157204c ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:54:58,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:54:58,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:54:58,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:54:58,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:54:58,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:54:58,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:54:58,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:54:58,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:54:58,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:54:58,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:54:58,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:54:58,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:54:58,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:54:58,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:54:58,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:54:58,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:54:58,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:54:58,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:54:58,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:54:58,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:54:58,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:54:58,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:54:58,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:54:58,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:54:58,624 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:54:58,624 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:54:58,625 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:54:58,626 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:54:58,628 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:54:58,628 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:54:58,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:54:58,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:54:58,632 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:54:58,634 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:54:58,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:54:58,636 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:54:58,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:54:58,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:54:58,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:54:58,639 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:54:58,641 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:54:58,704 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:54:58,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:54:58,707 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:54:58,707 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:54:58,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:54:58,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:54:58,710 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:54:58,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:54:58,711 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:54:58,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:54:58,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:54:58,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:54:58,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:54:58,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:54:58,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:54:58,714 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:54:58,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:54:58,715 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:54:58,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:54:58,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:54:58,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:54:58,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:54:58,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:54:58,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:54:58,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:54:58,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:54:58,717 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:54:58,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:54:58,718 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:54:58,720 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:54:58,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:54:58,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:54:58,721 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_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bb6ea6333d2c4e133ad252fe2bcbc17b832f383e2bb5defb402851de157204c [2021-10-21 19:54:59,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:54:59,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:54:59,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:54:59,120 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:54:59,121 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:54:59,122 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound50.c [2021-10-21 19:54:59,197 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/data/059dcb876/ebfb322e7a794e2bb7c739afbe3653c0/FLAG8d229306b [2021-10-21 19:54:59,765 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:54:59,766 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound50.c [2021-10-21 19:54:59,774 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/data/059dcb876/ebfb322e7a794e2bb7c739afbe3653c0/FLAG8d229306b [2021-10-21 19:55:00,086 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/data/059dcb876/ebfb322e7a794e2bb7c739afbe3653c0 [2021-10-21 19:55:00,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:55:00,094 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:55:00,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:55:00,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:55:00,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:55:00,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:55:00" (1/1) ... [2021-10-21 19:55:00,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63ce4bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:00, skipping insertion in model container [2021-10-21 19:55:00,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:55:00" (1/1) ... [2021-10-21 19:55:00,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:55:00,144 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:55:00,336 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_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound50.c[597,610] [2021-10-21 19:55:00,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:55:00,365 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:55:00,380 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_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound50.c[597,610] [2021-10-21 19:55:00,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:55:00,407 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:55:00,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:00 WrapperNode [2021-10-21 19:55:00,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:55:00,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:55:00,409 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:55:00,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:55:00,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:00" (1/1) ... [2021-10-21 19:55:00,427 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:00" (1/1) ... [2021-10-21 19:55:00,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:55:00,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:55:00,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:55:00,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:55:00,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:00" (1/1) ... [2021-10-21 19:55:00,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:00" (1/1) ... [2021-10-21 19:55:00,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:00" (1/1) ... [2021-10-21 19:55:00,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:00" (1/1) ... [2021-10-21 19:55:00,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:00" (1/1) ... [2021-10-21 19:55:00,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:00" (1/1) ... [2021-10-21 19:55:00,477 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:00" (1/1) ... [2021-10-21 19:55:00,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:55:00,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:55:00,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:55:00,481 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:55:00,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:00" (1/1) ... [2021-10-21 19:55:00,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:55:00,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:00,523 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:55:00,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:55:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:55:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:55:00,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:55:00,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:55:00,823 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:55:00,823 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-21 19:55:00,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:55:00 BoogieIcfgContainer [2021-10-21 19:55:00,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:55:00,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:55:00,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:55:00,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:55:00,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:55:00" (1/3) ... [2021-10-21 19:55:00,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4767def2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:55:00, skipping insertion in model container [2021-10-21 19:55:00,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:00" (2/3) ... [2021-10-21 19:55:00,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4767def2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:55:00, skipping insertion in model container [2021-10-21 19:55:00,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:55:00" (3/3) ... [2021-10-21 19:55:00,846 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound50.c [2021-10-21 19:55:00,856 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:55:00,856 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-21 19:55:00,922 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:55:00,931 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 [2021-10-21 19:55:00,931 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-21 19:55:00,949 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) [2021-10-21 19:55:00,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-21 19:55:00,955 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:00,956 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:55:00,957 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:00,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:00,964 INFO L82 PathProgramCache]: Analyzing trace with hash 890461031, now seen corresponding path program 1 times [2021-10-21 19:55:00,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:00,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644120783] [2021-10-21 19:55:00,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:00,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:01,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:01,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644120783] [2021-10-21 19:55:01,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644120783] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:55:01,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:55:01,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 19:55:01,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446346115] [2021-10-21 19:55:01,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 19:55:01,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:01,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:55:01,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:55:01,174 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) [2021-10-21 19:55:01,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:01,191 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2021-10-21 19:55:01,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:55:01,193 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 [2021-10-21 19:55:01,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:01,203 INFO L225 Difference]: With dead ends: 34 [2021-10-21 19:55:01,203 INFO L226 Difference]: Without dead ends: 14 [2021-10-21 19:55:01,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:55:01,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-21 19:55:01,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-21 19:55:01,240 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) [2021-10-21 19:55:01,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-21 19:55:01,242 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2021-10-21 19:55:01,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:01,243 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-21 19:55:01,243 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) [2021-10-21 19:55:01,244 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-10-21 19:55:01,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-21 19:55:01,244 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:01,245 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:55:01,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:55:01,246 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:01,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:01,247 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-10-21 19:55:01,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:01,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150767268] [2021-10-21 19:55:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:01,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:01,279 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:01,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430905119] [2021-10-21 19:55:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:01,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:01,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:01,295 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:01,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:55:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:01,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:55:01,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:01,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:01,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150767268] [2021-10-21 19:55:01,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:01,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430905119] [2021-10-21 19:55:01,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430905119] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:55:01,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:55:01,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:55:01,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754636791] [2021-10-21 19:55:01,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:55:01,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:01,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:55:01,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:55:01,605 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) [2021-10-21 19:55:01,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:01,728 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-10-21 19:55:01,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:55:01,729 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 [2021-10-21 19:55:01,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:01,730 INFO L225 Difference]: With dead ends: 30 [2021-10-21 19:55:01,730 INFO L226 Difference]: Without dead ends: 23 [2021-10-21 19:55:01,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:55:01,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-21 19:55:01,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2021-10-21 19:55:01,745 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) [2021-10-21 19:55:01,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-10-21 19:55:01,746 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2021-10-21 19:55:01,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:01,746 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-10-21 19:55:01,747 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) [2021-10-21 19:55:01,747 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-10-21 19:55:01,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:55:01,748 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:01,748 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:01,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:01,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:01,949 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:01,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:01,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1545533000, now seen corresponding path program 1 times [2021-10-21 19:55:01,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:01,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686479969] [2021-10-21 19:55:01,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:01,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:01,972 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:01,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [127429913] [2021-10-21 19:55:01,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:01,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:01,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:01,975 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:02,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:55:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:02,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 19:55:02,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:02,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:02,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686479969] [2021-10-21 19:55:02,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:02,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127429913] [2021-10-21 19:55:02,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127429913] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:02,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:02,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:55:02,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151045032] [2021-10-21 19:55:02,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:55:02,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:02,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:55:02,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:55:02,337 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) [2021-10-21 19:55:02,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:02,472 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-10-21 19:55:02,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:55:02,473 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 [2021-10-21 19:55:02,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:02,474 INFO L225 Difference]: With dead ends: 35 [2021-10-21 19:55:02,477 INFO L226 Difference]: Without dead ends: 33 [2021-10-21 19:55:02,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:55:02,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-21 19:55:02,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-10-21 19:55:02,486 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) [2021-10-21 19:55:02,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-10-21 19:55:02,489 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-10-21 19:55:02,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:02,490 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-10-21 19:55:02,490 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) [2021-10-21 19:55:02,490 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-10-21 19:55:02,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:55:02,492 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:02,492 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:02,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-21 19:55:02,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:02,706 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:02,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:02,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1602791302, now seen corresponding path program 1 times [2021-10-21 19:55:02,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:02,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146714615] [2021-10-21 19:55:02,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:02,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:02,727 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:02,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192409009] [2021-10-21 19:55:02,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:02,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:02,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:02,745 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:02,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:55:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:02,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:55:02,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:03,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:03,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146714615] [2021-10-21 19:55:03,069 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:03,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192409009] [2021-10-21 19:55:03,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192409009] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:03,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:03,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:55:03,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859617585] [2021-10-21 19:55:03,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:55:03,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:03,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:55:03,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:55:03,090 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) [2021-10-21 19:55:03,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:03,237 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-10-21 19:55:03,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:55:03,238 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 [2021-10-21 19:55:03,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:03,241 INFO L225 Difference]: With dead ends: 39 [2021-10-21 19:55:03,241 INFO L226 Difference]: Without dead ends: 33 [2021-10-21 19:55:03,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:55:03,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-21 19:55:03,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-10-21 19:55:03,258 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) [2021-10-21 19:55:03,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-10-21 19:55:03,264 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 12 [2021-10-21 19:55:03,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:03,265 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-10-21 19:55:03,265 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) [2021-10-21 19:55:03,265 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-10-21 19:55:03,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:55:03,267 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:03,267 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:03,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:03,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:03,488 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:03,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:03,489 INFO L82 PathProgramCache]: Analyzing trace with hash -666919436, now seen corresponding path program 1 times [2021-10-21 19:55:03,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:03,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608544722] [2021-10-21 19:55:03,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:03,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:03,504 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:03,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255023809] [2021-10-21 19:55:03,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:03,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:03,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:03,506 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:03,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:55:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:03,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:55:03,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:03,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:03,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608544722] [2021-10-21 19:55:03,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:03,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255023809] [2021-10-21 19:55:03,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255023809] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:03,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:03,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-21 19:55:03,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716678998] [2021-10-21 19:55:03,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:55:03,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:03,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:55:03,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:55:03,721 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) [2021-10-21 19:55:03,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:03,768 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-10-21 19:55:03,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:55:03,768 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 [2021-10-21 19:55:03,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:03,769 INFO L225 Difference]: With dead ends: 32 [2021-10-21 19:55:03,769 INFO L226 Difference]: Without dead ends: 28 [2021-10-21 19:55:03,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:55:03,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-21 19:55:03,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-21 19:55:03,774 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) [2021-10-21 19:55:03,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-10-21 19:55:03,775 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 13 [2021-10-21 19:55:03,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:03,775 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-10-21 19:55:03,776 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) [2021-10-21 19:55:03,776 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-10-21 19:55:03,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:55:03,777 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:03,777 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:03,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:04,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:04,001 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:04,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:04,002 INFO L82 PathProgramCache]: Analyzing trace with hash -919296115, now seen corresponding path program 1 times [2021-10-21 19:55:04,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:04,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897831786] [2021-10-21 19:55:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:04,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:04,017 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:04,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091504240] [2021-10-21 19:55:04,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:04,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:04,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:04,019 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:04,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:55:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:04,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-21 19:55:04,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:04,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:04,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897831786] [2021-10-21 19:55:04,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:04,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091504240] [2021-10-21 19:55:04,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091504240] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:04,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:04,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 19:55:04,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654158269] [2021-10-21 19:55:04,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:55:04,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:04,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:55:04,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:55:04,678 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) [2021-10-21 19:55:04,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:04,848 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-10-21 19:55:04,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:55:04,848 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 [2021-10-21 19:55:04,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:04,849 INFO L225 Difference]: With dead ends: 38 [2021-10-21 19:55:04,849 INFO L226 Difference]: Without dead ends: 34 [2021-10-21 19:55:04,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 186.1ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:55:04,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-21 19:55:04,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2021-10-21 19:55:04,854 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) [2021-10-21 19:55:04,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-10-21 19:55:04,854 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2021-10-21 19:55:04,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:04,855 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-10-21 19:55:04,855 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) [2021-10-21 19:55:04,855 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-10-21 19:55:04,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:55:04,856 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:04,856 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-21 19:55:04,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:05,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-21 19:55:05,057 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:05,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:05,058 INFO L82 PathProgramCache]: Analyzing trace with hash -443375322, now seen corresponding path program 2 times [2021-10-21 19:55:05,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:05,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989008541] [2021-10-21 19:55:05,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:05,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:05,071 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:05,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853079117] [2021-10-21 19:55:05,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:55:05,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:05,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:05,081 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:05,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:55:05,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:55:05,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:05,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-21 19:55:05,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:05,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:05,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989008541] [2021-10-21 19:55:05,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:05,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853079117] [2021-10-21 19:55:05,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853079117] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:05,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:05,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 19:55:05,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797440761] [2021-10-21 19:55:05,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:55:05,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:05,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:55:05,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:55:05,610 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) [2021-10-21 19:55:05,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:05,831 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-10-21 19:55:05,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:55:05,835 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 [2021-10-21 19:55:05,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:05,836 INFO L225 Difference]: With dead ends: 46 [2021-10-21 19:55:05,836 INFO L226 Difference]: Without dead ends: 44 [2021-10-21 19:55:05,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 199.3ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:55:05,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-21 19:55:05,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2021-10-21 19:55:05,843 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) [2021-10-21 19:55:05,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-10-21 19:55:05,844 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2021-10-21 19:55:05,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:05,845 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-10-21 19:55:05,845 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) [2021-10-21 19:55:05,845 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-10-21 19:55:05,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:55:05,846 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:05,846 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:05,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:06,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:06,073 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:06,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:06,074 INFO L82 PathProgramCache]: Analyzing trace with hash -500633624, now seen corresponding path program 1 times [2021-10-21 19:55:06,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:06,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658190089] [2021-10-21 19:55:06,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:06,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:06,085 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:06,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120046291] [2021-10-21 19:55:06,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:06,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:06,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:06,094 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:06,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:55:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:06,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-21 19:55:06,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:07,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:07,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658190089] [2021-10-21 19:55:07,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:07,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120046291] [2021-10-21 19:55:07,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120046291] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:07,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:07,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-21 19:55:07,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251292896] [2021-10-21 19:55:07,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:55:07,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:07,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:55:07,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:55:07,097 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) [2021-10-21 19:55:07,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:07,943 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-10-21 19:55:07,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:55:07,943 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 [2021-10-21 19:55:07,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:07,944 INFO L225 Difference]: With dead ends: 60 [2021-10-21 19:55:07,944 INFO L226 Difference]: Without dead ends: 48 [2021-10-21 19:55:07,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 610.9ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:55:07,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-21 19:55:07,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-10-21 19:55:07,951 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) [2021-10-21 19:55:07,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-10-21 19:55:07,952 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 18 [2021-10-21 19:55:07,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:07,953 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-10-21 19:55:07,953 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) [2021-10-21 19:55:07,953 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-10-21 19:55:07,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:55:07,954 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:07,954 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:07,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-21 19:55:08,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:08,177 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:08,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:08,178 INFO L82 PathProgramCache]: Analyzing trace with hash -701540760, now seen corresponding path program 2 times [2021-10-21 19:55:08,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:08,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359179830] [2021-10-21 19:55:08,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:08,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:08,201 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:08,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776857281] [2021-10-21 19:55:08,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:55:08,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:08,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:08,214 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:08,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:55:08,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:55:08,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:08,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-21 19:55:08,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:08,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:08,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359179830] [2021-10-21 19:55:08,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:08,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776857281] [2021-10-21 19:55:08,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776857281] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:08,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:08,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:55:08,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394451021] [2021-10-21 19:55:08,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:55:08,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:08,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:55:08,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:55:08,692 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) [2021-10-21 19:55:08,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:08,911 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-10-21 19:55:08,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:55:08,912 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 [2021-10-21 19:55:08,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:08,914 INFO L225 Difference]: With dead ends: 57 [2021-10-21 19:55:08,914 INFO L226 Difference]: Without dead ends: 55 [2021-10-21 19:55:08,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:55:08,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-21 19:55:08,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2021-10-21 19:55:08,922 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) [2021-10-21 19:55:08,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-10-21 19:55:08,923 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 18 [2021-10-21 19:55:08,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:08,923 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-10-21 19:55:08,924 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) [2021-10-21 19:55:08,924 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-10-21 19:55:08,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:55:08,925 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:08,925 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-21 19:55:08,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:09,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-21 19:55:09,139 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:09,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:09,139 INFO L82 PathProgramCache]: Analyzing trace with hash -758799062, now seen corresponding path program 2 times [2021-10-21 19:55:09,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:09,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406765263] [2021-10-21 19:55:09,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:09,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:09,158 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:09,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785536666] [2021-10-21 19:55:09,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:55:09,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:09,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:09,167 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:09,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:55:09,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:55:09,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:09,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-21 19:55:09,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:09,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:09,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406765263] [2021-10-21 19:55:09,817 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:09,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785536666] [2021-10-21 19:55:09,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785536666] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:09,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:09,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 19:55:09,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704623247] [2021-10-21 19:55:09,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:55:09,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:09,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:55:09,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:55:09,820 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) [2021-10-21 19:55:10,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:10,202 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-10-21 19:55:10,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:55:10,203 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 [2021-10-21 19:55:10,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:10,204 INFO L225 Difference]: With dead ends: 60 [2021-10-21 19:55:10,204 INFO L226 Difference]: Without dead ends: 54 [2021-10-21 19:55:10,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:55:10,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-21 19:55:10,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2021-10-21 19:55:10,233 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) [2021-10-21 19:55:10,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-10-21 19:55:10,233 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 18 [2021-10-21 19:55:10,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:10,234 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-10-21 19:55:10,234 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) [2021-10-21 19:55:10,234 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-10-21 19:55:10,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:55:10,235 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:10,235 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:10,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:10,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:10,445 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:10,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:10,446 INFO L82 PathProgramCache]: Analyzing trace with hash -859769786, now seen corresponding path program 2 times [2021-10-21 19:55:10,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:10,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651984895] [2021-10-21 19:55:10,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:10,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:10,458 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:10,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920461903] [2021-10-21 19:55:10,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:55:10,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:10,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:10,460 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:10,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:55:10,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:55:10,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:10,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:55:10,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:10,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:10,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651984895] [2021-10-21 19:55:10,768 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:10,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920461903] [2021-10-21 19:55:10,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920461903] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:10,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:10,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 19:55:10,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781418929] [2021-10-21 19:55:10,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:55:10,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:10,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:55:10,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:55:10,770 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) [2021-10-21 19:55:10,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:10,802 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-10-21 19:55:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:55:10,802 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 [2021-10-21 19:55:10,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:10,803 INFO L225 Difference]: With dead ends: 50 [2021-10-21 19:55:10,804 INFO L226 Difference]: Without dead ends: 46 [2021-10-21 19:55:10,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:55:10,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-21 19:55:10,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-10-21 19:55:10,810 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) [2021-10-21 19:55:10,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-10-21 19:55:10,811 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 19 [2021-10-21 19:55:10,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:10,812 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-10-21 19:55:10,812 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) [2021-10-21 19:55:10,812 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-10-21 19:55:10,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:55:10,813 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:10,814 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:10,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:11,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-21 19:55:11,041 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:11,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:11,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1564888737, now seen corresponding path program 2 times [2021-10-21 19:55:11,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:11,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850015704] [2021-10-21 19:55:11,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:11,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:11,065 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:11,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231818427] [2021-10-21 19:55:11,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:55:11,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:11,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:11,075 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:11,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:55:11,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:55:11,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:11,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-21 19:55:11,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:11,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:11,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850015704] [2021-10-21 19:55:11,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:11,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231818427] [2021-10-21 19:55:11,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231818427] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:11,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:11,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-21 19:55:11,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805494321] [2021-10-21 19:55:11,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:55:11,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:11,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:55:11,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:55:11,983 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) [2021-10-21 19:55:12,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:12,392 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-10-21 19:55:12,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:55:12,393 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 [2021-10-21 19:55:12,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:12,394 INFO L225 Difference]: With dead ends: 61 [2021-10-21 19:55:12,394 INFO L226 Difference]: Without dead ends: 57 [2021-10-21 19:55:12,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 375.6ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:55:12,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-21 19:55:12,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-10-21 19:55:12,407 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) [2021-10-21 19:55:12,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-10-21 19:55:12,407 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 21 [2021-10-21 19:55:12,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:12,408 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-10-21 19:55:12,408 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) [2021-10-21 19:55:12,408 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-10-21 19:55:12,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:55:12,409 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:12,409 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:12,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:12,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-21 19:55:12,610 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:12,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:12,611 INFO L82 PathProgramCache]: Analyzing trace with hash -285025059, now seen corresponding path program 1 times [2021-10-21 19:55:12,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:12,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202754311] [2021-10-21 19:55:12,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:12,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:12,626 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:12,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726338003] [2021-10-21 19:55:12,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:12,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:12,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:12,627 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:12,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:55:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:12,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:55:12,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:13,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:13,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202754311] [2021-10-21 19:55:13,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:13,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726338003] [2021-10-21 19:55:13,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726338003] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:13,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:13,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:55:13,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596663092] [2021-10-21 19:55:13,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:55:13,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:13,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:55:13,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:55:13,112 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) [2021-10-21 19:55:13,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:13,353 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-10-21 19:55:13,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:55:13,354 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 [2021-10-21 19:55:13,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:13,354 INFO L225 Difference]: With dead ends: 53 [2021-10-21 19:55:13,354 INFO L226 Difference]: Without dead ends: 49 [2021-10-21 19:55:13,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:55:13,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-21 19:55:13,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2021-10-21 19:55:13,361 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) [2021-10-21 19:55:13,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-10-21 19:55:13,362 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 21 [2021-10-21 19:55:13,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:13,362 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-10-21 19:55:13,362 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) [2021-10-21 19:55:13,362 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-10-21 19:55:13,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:55:13,364 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:13,364 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2021-10-21 19:55:13,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:13,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-21 19:55:13,589 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:13,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:13,589 INFO L82 PathProgramCache]: Analyzing trace with hash -429625836, now seen corresponding path program 3 times [2021-10-21 19:55:13,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:13,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707294455] [2021-10-21 19:55:13,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:13,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:13,601 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:13,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128295507] [2021-10-21 19:55:13,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:55:13,602 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:13,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:13,610 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:13,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:55:14,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:55:14,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:14,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-21 19:55:14,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-21 19:55:14,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:14,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707294455] [2021-10-21 19:55:14,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:14,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128295507] [2021-10-21 19:55:14,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128295507] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:14,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:14,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:55:14,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594117833] [2021-10-21 19:55:14,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:55:14,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:14,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:55:14,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:55:14,784 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) [2021-10-21 19:55:15,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:15,118 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-10-21 19:55:15,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:55:15,119 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 [2021-10-21 19:55:15,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:15,120 INFO L225 Difference]: With dead ends: 64 [2021-10-21 19:55:15,120 INFO L226 Difference]: Without dead ends: 62 [2021-10-21 19:55:15,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 236.9ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:55:15,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-21 19:55:15,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2021-10-21 19:55:15,127 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) [2021-10-21 19:55:15,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-10-21 19:55:15,128 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 24 [2021-10-21 19:55:15,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:15,128 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-10-21 19:55:15,129 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) [2021-10-21 19:55:15,129 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-10-21 19:55:15,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:55:15,130 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:15,130 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2021-10-21 19:55:15,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:15,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-21 19:55:15,330 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:15,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:15,331 INFO L82 PathProgramCache]: Analyzing trace with hash -486884138, now seen corresponding path program 3 times [2021-10-21 19:55:15,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:15,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37419096] [2021-10-21 19:55:15,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:15,331 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:15,350 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:15,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673529140] [2021-10-21 19:55:15,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:55:15,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:15,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:15,366 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:15,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:55:15,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:55:15,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:15,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-21 19:55:15,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:15,752 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-21 19:55:15,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:15,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37419096] [2021-10-21 19:55:15,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:15,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673529140] [2021-10-21 19:55:15,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673529140] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:15,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:15,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:55:15,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165379564] [2021-10-21 19:55:15,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:55:15,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:15,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:55:15,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:55:15,756 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) [2021-10-21 19:55:15,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:15,846 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-10-21 19:55:15,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:55:15,847 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 [2021-10-21 19:55:15,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:15,848 INFO L225 Difference]: With dead ends: 47 [2021-10-21 19:55:15,848 INFO L226 Difference]: Without dead ends: 45 [2021-10-21 19:55:15,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:55:15,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-21 19:55:15,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-10-21 19:55:15,855 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) [2021-10-21 19:55:15,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-10-21 19:55:15,855 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 24 [2021-10-21 19:55:15,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:15,855 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-10-21 19:55:15,856 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) [2021-10-21 19:55:15,856 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-10-21 19:55:15,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 19:55:15,857 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:15,857 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:15,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:16,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:16,058 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:16,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:16,058 INFO L82 PathProgramCache]: Analyzing trace with hash -433535720, now seen corresponding path program 3 times [2021-10-21 19:55:16,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:16,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46542673] [2021-10-21 19:55:16,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:16,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:16,070 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:16,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130029401] [2021-10-21 19:55:16,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:55:16,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:16,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:16,071 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:16,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:55:16,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 19:55:16,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:16,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:55:16,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:16,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:16,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46542673] [2021-10-21 19:55:16,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:16,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130029401] [2021-10-21 19:55:16,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130029401] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:16,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:16,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:55:16,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198340992] [2021-10-21 19:55:16,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:55:16,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:16,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:55:16,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:55:16,444 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) [2021-10-21 19:55:16,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:16,493 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-10-21 19:55:16,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:55:16,494 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 [2021-10-21 19:55:16,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:16,495 INFO L225 Difference]: With dead ends: 48 [2021-10-21 19:55:16,495 INFO L226 Difference]: Without dead ends: 44 [2021-10-21 19:55:16,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:55:16,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-21 19:55:16,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-21 19:55:16,502 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) [2021-10-21 19:55:16,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-10-21 19:55:16,503 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 25 [2021-10-21 19:55:16,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:16,503 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-10-21 19:55:16,503 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) [2021-10-21 19:55:16,503 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-10-21 19:55:16,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:55:16,504 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:16,505 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:16,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:16,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:16,719 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:16,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:16,719 INFO L82 PathProgramCache]: Analyzing trace with hash 24155569, now seen corresponding path program 3 times [2021-10-21 19:55:16,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:16,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21039819] [2021-10-21 19:55:16,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:16,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:16,730 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:16,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906295789] [2021-10-21 19:55:16,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:55:16,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:16,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:16,731 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:16,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:55:17,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:55:17,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:17,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 19:55:17,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-21 19:55:18,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:18,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21039819] [2021-10-21 19:55:18,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:18,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906295789] [2021-10-21 19:55:18,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906295789] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:55:18,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:55:18,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 19:55:18,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878158928] [2021-10-21 19:55:18,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:55:18,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:18,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:55:18,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:55:18,085 INFO L87 Difference]: Start difference. First operand 44 states and 50 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) [2021-10-21 19:55:18,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:18,313 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2021-10-21 19:55:18,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:55:18,313 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 27 [2021-10-21 19:55:18,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:18,314 INFO L225 Difference]: With dead ends: 84 [2021-10-21 19:55:18,314 INFO L226 Difference]: Without dead ends: 80 [2021-10-21 19:55:18,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 286.8ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:55:18,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-21 19:55:18,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2021-10-21 19:55:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 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) [2021-10-21 19:55:18,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-10-21 19:55:18,321 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 27 [2021-10-21 19:55:18,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:18,321 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-10-21 19:55:18,321 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) [2021-10-21 19:55:18,321 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-10-21 19:55:18,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:55:18,322 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:18,322 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:18,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:18,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 19:55:18,528 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:18,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:18,529 INFO L82 PathProgramCache]: Analyzing trace with hash -655902801, now seen corresponding path program 2 times [2021-10-21 19:55:18,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:18,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933956533] [2021-10-21 19:55:18,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:18,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:18,537 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:18,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226184316] [2021-10-21 19:55:18,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:55:18,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:18,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:18,538 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:18,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 19:55:18,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:55:18,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:18,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:55:18,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:19,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:19,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933956533] [2021-10-21 19:55:19,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:19,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226184316] [2021-10-21 19:55:19,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226184316] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:19,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:19,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 19:55:19,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898390294] [2021-10-21 19:55:19,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:55:19,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:19,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:55:19,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:55:19,415 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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) [2021-10-21 19:55:19,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:19,768 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2021-10-21 19:55:19,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:55:19,768 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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) Word has length 27 [2021-10-21 19:55:19,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:19,769 INFO L225 Difference]: With dead ends: 70 [2021-10-21 19:55:19,769 INFO L226 Difference]: Without dead ends: 66 [2021-10-21 19:55:19,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:55:19,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-21 19:55:19,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2021-10-21 19:55:19,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 57 states have internal predecessors, (66), 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) [2021-10-21 19:55:19,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-10-21 19:55:19,777 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 27 [2021-10-21 19:55:19,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:19,777 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-10-21 19:55:19,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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) [2021-10-21 19:55:19,777 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-10-21 19:55:19,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:55:19,778 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:19,778 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:19,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:19,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 19:55:19,983 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:19,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:19,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1078604627, now seen corresponding path program 3 times [2021-10-21 19:55:19,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:19,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109621495] [2021-10-21 19:55:19,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:19,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:19,997 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:19,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1806363371] [2021-10-21 19:55:19,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:55:19,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:19,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:20,010 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:20,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:55:20,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:55:20,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:20,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:55:20,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-21 19:55:20,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:20,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109621495] [2021-10-21 19:55:20,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:20,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806363371] [2021-10-21 19:55:20,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806363371] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:55:20,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:55:20,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 19:55:20,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783872] [2021-10-21 19:55:20,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:55:20,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:20,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:55:20,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:55:20,839 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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) [2021-10-21 19:55:20,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:20,973 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2021-10-21 19:55:20,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:55:20,974 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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 27 [2021-10-21 19:55:20,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:20,974 INFO L225 Difference]: With dead ends: 62 [2021-10-21 19:55:20,974 INFO L226 Difference]: Without dead ends: 58 [2021-10-21 19:55:20,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:55:20,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-21 19:55:20,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2021-10-21 19:55:20,980 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) [2021-10-21 19:55:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-10-21 19:55:20,981 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 27 [2021-10-21 19:55:20,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:20,981 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-10-21 19:55:20,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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) [2021-10-21 19:55:20,982 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-10-21 19:55:20,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-21 19:55:20,982 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:20,982 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:20,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:21,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:21,188 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:21,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:21,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1957613462, now seen corresponding path program 4 times [2021-10-21 19:55:21,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:21,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577753336] [2021-10-21 19:55:21,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:21,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:21,202 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:21,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420705418] [2021-10-21 19:55:21,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:55:21,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:21,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:21,204 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:21,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 19:55:21,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:55:21,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:21,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:55:21,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:21,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:21,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577753336] [2021-10-21 19:55:21,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:21,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420705418] [2021-10-21 19:55:21,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420705418] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:21,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:21,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:55:21,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795849923] [2021-10-21 19:55:21,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:55:21,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:21,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:55:21,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:55:21,612 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) [2021-10-21 19:55:21,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:21,653 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-10-21 19:55:21,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:55:21,654 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 [2021-10-21 19:55:21,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:21,654 INFO L225 Difference]: With dead ends: 54 [2021-10-21 19:55:21,655 INFO L226 Difference]: Without dead ends: 50 [2021-10-21 19:55:21,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:55:21,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-21 19:55:21,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-10-21 19:55:21,660 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) [2021-10-21 19:55:21,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-10-21 19:55:21,661 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 31 [2021-10-21 19:55:21,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:21,661 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-10-21 19:55:21,662 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) [2021-10-21 19:55:21,662 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-10-21 19:55:21,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 19:55:21,662 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:21,662 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:21,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:21,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:21,881 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:21,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:21,881 INFO L82 PathProgramCache]: Analyzing trace with hash -553888196, now seen corresponding path program 5 times [2021-10-21 19:55:21,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:21,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088244786] [2021-10-21 19:55:21,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:21,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:21,889 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:21,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548018462] [2021-10-21 19:55:21,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:55:21,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:21,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:21,890 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:21,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 19:55:22,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-21 19:55:22,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:22,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:55:22,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:22,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:22,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088244786] [2021-10-21 19:55:22,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:22,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548018462] [2021-10-21 19:55:22,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548018462] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:22,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:22,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:55:22,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939878723] [2021-10-21 19:55:22,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:55:22,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:22,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:55:22,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:55:22,312 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) [2021-10-21 19:55:22,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:22,370 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2021-10-21 19:55:22,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:55:22,370 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 [2021-10-21 19:55:22,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:22,371 INFO L225 Difference]: With dead ends: 60 [2021-10-21 19:55:22,371 INFO L226 Difference]: Without dead ends: 56 [2021-10-21 19:55:22,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:55:22,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-21 19:55:22,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-10-21 19:55:22,378 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) [2021-10-21 19:55:22,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-10-21 19:55:22,378 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 37 [2021-10-21 19:55:22,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:22,379 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-10-21 19:55:22,379 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) [2021-10-21 19:55:22,379 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-10-21 19:55:22,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-21 19:55:22,380 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:22,380 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:22,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:22,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-21 19:55:22,595 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:22,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:22,595 INFO L82 PathProgramCache]: Analyzing trace with hash 835999374, now seen corresponding path program 6 times [2021-10-21 19:55:22,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:22,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562162287] [2021-10-21 19:55:22,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:22,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:22,603 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:22,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469248605] [2021-10-21 19:55:22,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:55:22,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:22,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:22,607 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:22,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 19:55:23,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-21 19:55:23,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:23,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:55:23,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:23,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:23,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562162287] [2021-10-21 19:55:23,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:23,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469248605] [2021-10-21 19:55:23,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469248605] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:23,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:23,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 19:55:23,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337811998] [2021-10-21 19:55:23,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:55:23,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:23,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:55:23,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:55:23,284 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) [2021-10-21 19:55:23,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:23,379 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2021-10-21 19:55:23,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:55:23,379 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 [2021-10-21 19:55:23,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:23,380 INFO L225 Difference]: With dead ends: 66 [2021-10-21 19:55:23,380 INFO L226 Difference]: Without dead ends: 62 [2021-10-21 19:55:23,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:55:23,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-21 19:55:23,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-21 19:55:23,389 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) [2021-10-21 19:55:23,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-10-21 19:55:23,390 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 43 [2021-10-21 19:55:23,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:23,391 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-10-21 19:55:23,391 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) [2021-10-21 19:55:23,391 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-10-21 19:55:23,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-21 19:55:23,392 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:23,392 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:23,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:23,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:23,599 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:23,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:23,600 INFO L82 PathProgramCache]: Analyzing trace with hash -194293408, now seen corresponding path program 7 times [2021-10-21 19:55:23,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:23,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156854892] [2021-10-21 19:55:23,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:23,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:23,606 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:23,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545264108] [2021-10-21 19:55:23,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:55:23,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:23,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:23,611 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:23,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 19:55:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:23,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:55:23,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:24,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:24,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156854892] [2021-10-21 19:55:24,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:24,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545264108] [2021-10-21 19:55:24,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545264108] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:24,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:24,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 19:55:24,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905808181] [2021-10-21 19:55:24,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:55:24,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:24,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:55:24,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:55:24,127 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) [2021-10-21 19:55:24,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:24,221 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-10-21 19:55:24,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:55:24,222 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 [2021-10-21 19:55:24,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:24,223 INFO L225 Difference]: With dead ends: 72 [2021-10-21 19:55:24,223 INFO L226 Difference]: Without dead ends: 68 [2021-10-21 19:55:24,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:55:24,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-21 19:55:24,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-10-21 19:55:24,232 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) [2021-10-21 19:55:24,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2021-10-21 19:55:24,233 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 49 [2021-10-21 19:55:24,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:24,233 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2021-10-21 19:55:24,233 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) [2021-10-21 19:55:24,233 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2021-10-21 19:55:24,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-21 19:55:24,234 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:24,234 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:24,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-10-21 19:55:24,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:24,441 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:24,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:24,441 INFO L82 PathProgramCache]: Analyzing trace with hash 691758770, now seen corresponding path program 8 times [2021-10-21 19:55:24,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:24,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489193913] [2021-10-21 19:55:24,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:24,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:24,449 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:24,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164982614] [2021-10-21 19:55:24,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:55:24,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:24,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:24,451 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:24,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-21 19:55:24,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:55:24,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:24,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:55:24,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:25,041 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:25,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:25,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489193913] [2021-10-21 19:55:25,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:25,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164982614] [2021-10-21 19:55:25,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164982614] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:25,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:25,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-21 19:55:25,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456144798] [2021-10-21 19:55:25,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:55:25,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:25,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:55:25,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:55:25,045 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) [2021-10-21 19:55:25,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:25,168 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2021-10-21 19:55:25,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 19:55:25,169 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 [2021-10-21 19:55:25,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:25,170 INFO L225 Difference]: With dead ends: 78 [2021-10-21 19:55:25,170 INFO L226 Difference]: Without dead ends: 74 [2021-10-21 19:55:25,171 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 126.9ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:55:25,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-21 19:55:25,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-21 19:55:25,181 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) [2021-10-21 19:55:25,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-10-21 19:55:25,181 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 55 [2021-10-21 19:55:25,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:25,182 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-10-21 19:55:25,182 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) [2021-10-21 19:55:25,182 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-10-21 19:55:25,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-21 19:55:25,183 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:25,183 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:25,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:25,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-21 19:55:25,389 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:25,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:25,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1453766276, now seen corresponding path program 9 times [2021-10-21 19:55:25,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:25,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182840976] [2021-10-21 19:55:25,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:25,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:25,397 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:25,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117983720] [2021-10-21 19:55:25,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:55:25,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:25,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:25,417 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:25,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-21 19:55:25,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-21 19:55:25,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:25,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:55:25,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:26,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:26,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182840976] [2021-10-21 19:55:26,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:26,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117983720] [2021-10-21 19:55:26,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117983720] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:26,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:26,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-21 19:55:26,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372855358] [2021-10-21 19:55:26,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:55:26,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:26,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:55:26,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:55:26,130 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) [2021-10-21 19:55:26,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:26,253 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2021-10-21 19:55:26,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-21 19:55:26,253 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 [2021-10-21 19:55:26,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:26,254 INFO L225 Difference]: With dead ends: 84 [2021-10-21 19:55:26,255 INFO L226 Difference]: Without dead ends: 80 [2021-10-21 19:55:26,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:55:26,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-21 19:55:26,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-10-21 19:55:26,265 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) [2021-10-21 19:55:26,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-10-21 19:55:26,266 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 61 [2021-10-21 19:55:26,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:26,266 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-10-21 19:55:26,266 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) [2021-10-21 19:55:26,267 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-10-21 19:55:26,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-21 19:55:26,267 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:26,268 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:26,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-21 19:55:26,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:26,481 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:26,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:26,481 INFO L82 PathProgramCache]: Analyzing trace with hash -118005546, now seen corresponding path program 10 times [2021-10-21 19:55:26,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:26,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792853393] [2021-10-21 19:55:26,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:26,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:26,491 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:26,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891512587] [2021-10-21 19:55:26,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:55:26,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:26,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:26,492 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:26,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-21 19:55:26,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:55:26,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:26,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 19:55:26,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:27,176 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:27,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:27,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792853393] [2021-10-21 19:55:27,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:27,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891512587] [2021-10-21 19:55:27,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891512587] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:27,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:27,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-21 19:55:27,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133179248] [2021-10-21 19:55:27,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:55:27,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:27,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:55:27,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:55:27,179 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 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) [2021-10-21 19:55:27,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:27,316 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2021-10-21 19:55:27,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-21 19:55:27,317 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 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 67 [2021-10-21 19:55:27,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:27,318 INFO L225 Difference]: With dead ends: 90 [2021-10-21 19:55:27,318 INFO L226 Difference]: Without dead ends: 86 [2021-10-21 19:55:27,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-10-21 19:55:27,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-21 19:55:27,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-10-21 19:55:27,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 85 states have internal predecessors, (98), 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) [2021-10-21 19:55:27,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2021-10-21 19:55:27,330 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 67 [2021-10-21 19:55:27,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:27,331 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2021-10-21 19:55:27,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 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) [2021-10-21 19:55:27,331 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2021-10-21 19:55:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-21 19:55:27,332 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:27,332 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:27,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:27,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-21 19:55:27,551 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:27,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:27,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1952417192, now seen corresponding path program 11 times [2021-10-21 19:55:27,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:27,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744956770] [2021-10-21 19:55:27,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:27,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:27,569 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:27,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673070039] [2021-10-21 19:55:27,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:55:27,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:27,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:27,571 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:27,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-21 19:55:30,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-10-21 19:55:30,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:30,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-21 19:55:30,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:30,469 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:30,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:30,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744956770] [2021-10-21 19:55:30,469 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:30,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673070039] [2021-10-21 19:55:30,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673070039] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:30,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:30,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-21 19:55:30,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168599674] [2021-10-21 19:55:30,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:55:30,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:30,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:55:30,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:55:30,472 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 14 states have internal predecessors, (73), 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) [2021-10-21 19:55:30,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:30,632 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2021-10-21 19:55:30,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-21 19:55:30,633 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 14 states have internal predecessors, (73), 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 73 [2021-10-21 19:55:30,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:30,634 INFO L225 Difference]: With dead ends: 96 [2021-10-21 19:55:30,634 INFO L226 Difference]: Without dead ends: 92 [2021-10-21 19:55:30,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 180.1ms TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-10-21 19:55:30,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-21 19:55:30,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-10-21 19:55:30,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 91 states have internal predecessors, (105), 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) [2021-10-21 19:55:30,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2021-10-21 19:55:30,646 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 73 [2021-10-21 19:55:30,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:30,646 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2021-10-21 19:55:30,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 14 states have internal predecessors, (73), 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) [2021-10-21 19:55:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2021-10-21 19:55:30,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-21 19:55:30,647 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:30,647 INFO L512 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:30,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:30,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-21 19:55:30,857 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:30,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:30,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2030484230, now seen corresponding path program 12 times [2021-10-21 19:55:30,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:30,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883635806] [2021-10-21 19:55:30,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:30,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:30,867 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:30,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291691234] [2021-10-21 19:55:30,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:55:30,868 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:30,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:30,872 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:30,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-21 19:55:33,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-10-21 19:55:33,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:33,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-21 19:55:33,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:33,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:33,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883635806] [2021-10-21 19:55:33,434 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:33,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291691234] [2021-10-21 19:55:33,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291691234] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:33,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:33,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-10-21 19:55:33,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412973357] [2021-10-21 19:55:33,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:55:33,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:33,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:55:33,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:55:33,437 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:33,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:33,657 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2021-10-21 19:55:33,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-21 19:55:33,658 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-10-21 19:55:33,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:33,659 INFO L225 Difference]: With dead ends: 102 [2021-10-21 19:55:33,659 INFO L226 Difference]: Without dead ends: 98 [2021-10-21 19:55:33,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 263.4ms TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-10-21 19:55:33,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-21 19:55:33,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-10-21 19:55:33,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 97 states have internal predecessors, (112), 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) [2021-10-21 19:55:33,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2021-10-21 19:55:33,675 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 79 [2021-10-21 19:55:33,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:33,676 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2021-10-21 19:55:33,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:33,676 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2021-10-21 19:55:33,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-21 19:55:33,677 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:33,677 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:33,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:33,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-21 19:55:33,885 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:33,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:33,885 INFO L82 PathProgramCache]: Analyzing trace with hash 986103500, now seen corresponding path program 13 times [2021-10-21 19:55:33,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:33,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102270378] [2021-10-21 19:55:33,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:33,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:33,895 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:33,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965254196] [2021-10-21 19:55:33,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:55:33,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:33,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:33,897 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:33,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-21 19:55:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:34,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-21 19:55:34,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:34,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:34,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102270378] [2021-10-21 19:55:34,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:34,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965254196] [2021-10-21 19:55:34,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965254196] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:34,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:34,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-10-21 19:55:34,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502151906] [2021-10-21 19:55:34,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 19:55:34,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:34,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 19:55:34,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:55:34,757 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:34,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:34,972 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2021-10-21 19:55:34,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-21 19:55:34,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-10-21 19:55:34,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:34,974 INFO L225 Difference]: With dead ends: 108 [2021-10-21 19:55:34,974 INFO L226 Difference]: Without dead ends: 104 [2021-10-21 19:55:34,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-10-21 19:55:34,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-21 19:55:34,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-10-21 19:55:34,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.1553398058252426) internal successors, (119), 103 states have internal predecessors, (119), 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) [2021-10-21 19:55:35,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2021-10-21 19:55:35,001 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 85 [2021-10-21 19:55:35,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:35,001 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2021-10-21 19:55:35,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:35,001 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2021-10-21 19:55:35,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-21 19:55:35,002 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:35,003 INFO L512 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:35,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:35,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-21 19:55:35,216 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:35,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:35,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1471288094, now seen corresponding path program 14 times [2021-10-21 19:55:35,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:35,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434186617] [2021-10-21 19:55:35,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:35,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:35,224 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:35,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858411699] [2021-10-21 19:55:35,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:55:35,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:35,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:35,226 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:35,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-21 19:55:35,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:55:35,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:35,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-21 19:55:35,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:36,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:36,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434186617] [2021-10-21 19:55:36,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:36,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858411699] [2021-10-21 19:55:36,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858411699] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:36,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:36,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-10-21 19:55:36,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239753846] [2021-10-21 19:55:36,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:55:36,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:36,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:55:36,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:55:36,127 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 17 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) [2021-10-21 19:55:36,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:36,353 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2021-10-21 19:55:36,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-21 19:55:36,353 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 17 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) Word has length 91 [2021-10-21 19:55:36,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:36,354 INFO L225 Difference]: With dead ends: 114 [2021-10-21 19:55:36,355 INFO L226 Difference]: Without dead ends: 110 [2021-10-21 19:55:36,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 276.3ms TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-10-21 19:55:36,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-21 19:55:36,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-10-21 19:55:36,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 109 states have internal predecessors, (126), 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) [2021-10-21 19:55:36,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2021-10-21 19:55:36,377 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 91 [2021-10-21 19:55:36,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:36,378 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2021-10-21 19:55:36,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 17 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) [2021-10-21 19:55:36,378 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2021-10-21 19:55:36,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-10-21 19:55:36,379 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:36,380 INFO L512 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:36,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-10-21 19:55:36,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:36,589 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:36,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:36,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1435329008, now seen corresponding path program 15 times [2021-10-21 19:55:36,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:36,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650063013] [2021-10-21 19:55:36,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:36,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:36,607 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:36,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1334824808] [2021-10-21 19:55:36,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:55:36,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:36,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:36,608 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:36,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-21 19:55:37,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-10-21 19:55:37,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:37,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-21 19:55:37,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:37,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:37,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650063013] [2021-10-21 19:55:37,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:37,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334824808] [2021-10-21 19:55:37,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334824808] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:37,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:37,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-10-21 19:55:37,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441467010] [2021-10-21 19:55:37,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:55:37,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:37,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:55:37,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:55:37,943 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 18 states have internal predecessors, (97), 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) [2021-10-21 19:55:38,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:38,208 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2021-10-21 19:55:38,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-21 19:55:38,208 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 18 states have internal predecessors, (97), 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 97 [2021-10-21 19:55:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:38,209 INFO L225 Difference]: With dead ends: 120 [2021-10-21 19:55:38,209 INFO L226 Difference]: Without dead ends: 116 [2021-10-21 19:55:38,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 335.3ms TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-10-21 19:55:38,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-21 19:55:38,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-10-21 19:55:38,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.1565217391304348) internal successors, (133), 115 states have internal predecessors, (133), 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) [2021-10-21 19:55:38,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 133 transitions. [2021-10-21 19:55:38,229 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 133 transitions. Word has length 97 [2021-10-21 19:55:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:38,231 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 133 transitions. [2021-10-21 19:55:38,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 18 states have internal predecessors, (97), 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) [2021-10-21 19:55:38,232 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 133 transitions. [2021-10-21 19:55:38,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-10-21 19:55:38,233 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:38,233 INFO L512 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:38,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:38,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:38,442 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:38,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:38,442 INFO L82 PathProgramCache]: Analyzing trace with hash -837629118, now seen corresponding path program 16 times [2021-10-21 19:55:38,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:38,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769303852] [2021-10-21 19:55:38,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:38,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:38,452 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:38,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619134268] [2021-10-21 19:55:38,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:55:38,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:38,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:38,454 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:38,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-21 19:55:39,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:55:39,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:39,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-21 19:55:39,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:39,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:39,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769303852] [2021-10-21 19:55:39,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:39,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619134268] [2021-10-21 19:55:39,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619134268] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:39,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:39,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-10-21 19:55:39,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705646427] [2021-10-21 19:55:39,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 19:55:39,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:39,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 19:55:39,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:55:39,652 INFO L87 Difference]: Start difference. First operand 116 states and 133 transitions. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 19 states have internal predecessors, (103), 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) [2021-10-21 19:55:39,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:39,922 INFO L93 Difference]: Finished difference Result 126 states and 144 transitions. [2021-10-21 19:55:39,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-21 19:55:39,923 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 19 states have internal predecessors, (103), 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 103 [2021-10-21 19:55:39,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:39,924 INFO L225 Difference]: With dead ends: 126 [2021-10-21 19:55:39,924 INFO L226 Difference]: Without dead ends: 122 [2021-10-21 19:55:39,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 323.8ms TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-10-21 19:55:39,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-21 19:55:39,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-10-21 19:55:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1570247933884297) internal successors, (140), 121 states have internal predecessors, (140), 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) [2021-10-21 19:55:39,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 140 transitions. [2021-10-21 19:55:39,939 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 140 transitions. Word has length 103 [2021-10-21 19:55:39,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:39,940 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 140 transitions. [2021-10-21 19:55:39,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 19 states have internal predecessors, (103), 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) [2021-10-21 19:55:39,940 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 140 transitions. [2021-10-21 19:55:39,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-21 19:55:39,942 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:39,942 INFO L512 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:39,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:40,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:40,150 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:40,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:40,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1860464404, now seen corresponding path program 17 times [2021-10-21 19:55:40,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:40,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226655686] [2021-10-21 19:55:40,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:40,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:40,162 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:40,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779964929] [2021-10-21 19:55:40,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:55:40,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:40,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:40,163 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:40,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-21 19:55:42,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-10-21 19:55:42,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:42,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-21 19:55:42,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:42,918 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:42,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:42,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226655686] [2021-10-21 19:55:42,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:42,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779964929] [2021-10-21 19:55:42,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779964929] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:42,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:42,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-10-21 19:55:42,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671963025] [2021-10-21 19:55:42,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-21 19:55:42,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:42,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-21 19:55:42,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:55:42,921 INFO L87 Difference]: Start difference. First operand 122 states and 140 transitions. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 20 states have internal predecessors, (109), 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) [2021-10-21 19:55:43,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:43,184 INFO L93 Difference]: Finished difference Result 132 states and 151 transitions. [2021-10-21 19:55:43,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-21 19:55:43,184 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 20 states have internal predecessors, (109), 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 109 [2021-10-21 19:55:43,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:43,186 INFO L225 Difference]: With dead ends: 132 [2021-10-21 19:55:43,186 INFO L226 Difference]: Without dead ends: 128 [2021-10-21 19:55:43,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2021-10-21 19:55:43,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-21 19:55:43,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-10-21 19:55:43,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.1574803149606299) internal successors, (147), 127 states have internal predecessors, (147), 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) [2021-10-21 19:55:43,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 147 transitions. [2021-10-21 19:55:43,200 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 147 transitions. Word has length 109 [2021-10-21 19:55:43,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:43,200 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 147 transitions. [2021-10-21 19:55:43,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 20 states have internal predecessors, (109), 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) [2021-10-21 19:55:43,200 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 147 transitions. [2021-10-21 19:55:43,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-21 19:55:43,201 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:43,201 INFO L512 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:43,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:43,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-21 19:55:43,410 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:43,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:43,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1804365158, now seen corresponding path program 18 times [2021-10-21 19:55:43,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:43,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067719549] [2021-10-21 19:55:43,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:43,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:43,422 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:43,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8800751] [2021-10-21 19:55:43,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:55:43,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:43,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:43,424 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:43,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-21 19:55:46,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-10-21 19:55:46,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:46,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-21 19:55:46,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:47,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:47,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067719549] [2021-10-21 19:55:47,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:47,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8800751] [2021-10-21 19:55:47,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8800751] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:47,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:47,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-10-21 19:55:47,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913723655] [2021-10-21 19:55:47,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-21 19:55:47,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:47,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-21 19:55:47,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:55:47,045 INFO L87 Difference]: Start difference. First operand 128 states and 147 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 21 states have internal predecessors, (115), 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) [2021-10-21 19:55:47,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:47,281 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2021-10-21 19:55:47,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-21 19:55:47,281 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 21 states have internal predecessors, (115), 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 115 [2021-10-21 19:55:47,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:47,282 INFO L225 Difference]: With dead ends: 138 [2021-10-21 19:55:47,282 INFO L226 Difference]: Without dead ends: 134 [2021-10-21 19:55:47,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 328.9ms TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-10-21 19:55:47,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-21 19:55:47,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-10-21 19:55:47,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.1578947368421053) internal successors, (154), 133 states have internal predecessors, (154), 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) [2021-10-21 19:55:47,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 154 transitions. [2021-10-21 19:55:47,296 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 154 transitions. Word has length 115 [2021-10-21 19:55:47,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:47,297 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 154 transitions. [2021-10-21 19:55:47,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 21 states have internal predecessors, (115), 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) [2021-10-21 19:55:47,297 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 154 transitions. [2021-10-21 19:55:47,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-10-21 19:55:47,298 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:47,298 INFO L512 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:47,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-21 19:55:47,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-21 19:55:47,509 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:47,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:47,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1870456376, now seen corresponding path program 19 times [2021-10-21 19:55:47,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:47,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196396063] [2021-10-21 19:55:47,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:47,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:47,518 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:47,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712525663] [2021-10-21 19:55:47,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:55:47,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:47,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:47,520 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:47,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-21 19:55:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:48,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-21 19:55:48,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:48,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:48,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196396063] [2021-10-21 19:55:48,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:48,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712525663] [2021-10-21 19:55:48,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712525663] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:48,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:48,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-10-21 19:55:48,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596747260] [2021-10-21 19:55:48,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-21 19:55:48,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:48,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-21 19:55:48,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:55:48,677 INFO L87 Difference]: Start difference. First operand 134 states and 154 transitions. Second operand has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 22 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:48,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:48,968 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2021-10-21 19:55:48,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-21 19:55:48,969 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 22 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-10-21 19:55:48,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:48,970 INFO L225 Difference]: With dead ends: 144 [2021-10-21 19:55:48,970 INFO L226 Difference]: Without dead ends: 140 [2021-10-21 19:55:48,971 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 388.6ms TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-10-21 19:55:48,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-21 19:55:48,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-10-21 19:55:48,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.158273381294964) internal successors, (161), 139 states have internal predecessors, (161), 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) [2021-10-21 19:55:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 161 transitions. [2021-10-21 19:55:48,986 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 161 transitions. Word has length 121 [2021-10-21 19:55:48,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:48,987 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 161 transitions. [2021-10-21 19:55:48,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 22 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:48,987 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 161 transitions. [2021-10-21 19:55:48,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-10-21 19:55:48,988 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:48,988 INFO L512 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:49,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:49,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-21 19:55:49,205 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:49,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:49,205 INFO L82 PathProgramCache]: Analyzing trace with hash 269482378, now seen corresponding path program 20 times [2021-10-21 19:55:49,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:49,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030201199] [2021-10-21 19:55:49,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:49,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:49,224 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:49,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611447896] [2021-10-21 19:55:49,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:55:49,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:49,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:49,228 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:49,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-21 19:55:49,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:55:49,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:49,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-21 19:55:49,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:50,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:50,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030201199] [2021-10-21 19:55:50,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:50,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611447896] [2021-10-21 19:55:50,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611447896] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:50,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:50,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-10-21 19:55:50,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657922971] [2021-10-21 19:55:50,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-21 19:55:50,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:50,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-21 19:55:50,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-10-21 19:55:50,527 INFO L87 Difference]: Start difference. First operand 140 states and 161 transitions. Second operand has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 23 states have internal predecessors, (127), 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) [2021-10-21 19:55:50,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:50,866 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2021-10-21 19:55:50,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-21 19:55:50,866 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 23 states have internal predecessors, (127), 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 127 [2021-10-21 19:55:50,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:50,868 INFO L225 Difference]: With dead ends: 150 [2021-10-21 19:55:50,868 INFO L226 Difference]: Without dead ends: 146 [2021-10-21 19:55:50,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 474.5ms TimeCoverageRelationStatistics Valid=715, Invalid=1177, Unknown=0, NotChecked=0, Total=1892 [2021-10-21 19:55:50,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-21 19:55:50,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-10-21 19:55:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.1586206896551725) internal successors, (168), 145 states have internal predecessors, (168), 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) [2021-10-21 19:55:50,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 168 transitions. [2021-10-21 19:55:50,885 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 168 transitions. Word has length 127 [2021-10-21 19:55:50,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:50,886 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 168 transitions. [2021-10-21 19:55:50,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 23 states have internal predecessors, (127), 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) [2021-10-21 19:55:50,886 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 168 transitions. [2021-10-21 19:55:50,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-10-21 19:55:50,887 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:50,888 INFO L512 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:50,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:51,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-21 19:55:51,097 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:51,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:51,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1098397860, now seen corresponding path program 21 times [2021-10-21 19:55:51,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:51,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940255610] [2021-10-21 19:55:51,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:51,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:51,112 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:51,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966403942] [2021-10-21 19:55:51,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:55:51,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:51,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:51,114 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:51,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-21 19:55:52,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-10-21 19:55:52,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:52,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-21 19:55:52,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 1302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:53,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:53,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940255610] [2021-10-21 19:55:53,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:53,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966403942] [2021-10-21 19:55:53,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966403942] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:53,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:53,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-10-21 19:55:53,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008270269] [2021-10-21 19:55:53,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-21 19:55:53,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:53,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-21 19:55:53,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:55:53,223 INFO L87 Difference]: Start difference. First operand 146 states and 168 transitions. Second operand has 25 states, 25 states have (on average 5.32) internal successors, (133), 24 states have internal predecessors, (133), 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) [2021-10-21 19:55:53,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:53,586 INFO L93 Difference]: Finished difference Result 156 states and 179 transitions. [2021-10-21 19:55:53,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-21 19:55:53,587 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.32) internal successors, (133), 24 states have internal predecessors, (133), 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 133 [2021-10-21 19:55:53,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:53,588 INFO L225 Difference]: With dead ends: 156 [2021-10-21 19:55:53,588 INFO L226 Difference]: Without dead ends: 152 [2021-10-21 19:55:53,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 476.9ms TimeCoverageRelationStatistics Valid=782, Invalid=1288, Unknown=0, NotChecked=0, Total=2070 [2021-10-21 19:55:53,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-21 19:55:53,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-10-21 19:55:53,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.1589403973509933) internal successors, (175), 151 states have internal predecessors, (175), 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) [2021-10-21 19:55:53,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 175 transitions. [2021-10-21 19:55:53,602 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 175 transitions. Word has length 133 [2021-10-21 19:55:53,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:53,603 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 175 transitions. [2021-10-21 19:55:53,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.32) internal successors, (133), 24 states have internal predecessors, (133), 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) [2021-10-21 19:55:53,603 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 175 transitions. [2021-10-21 19:55:53,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-10-21 19:55:53,604 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:53,605 INFO L512 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:53,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:53,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-21 19:55:53,816 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:53,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:53,816 INFO L82 PathProgramCache]: Analyzing trace with hash 974024622, now seen corresponding path program 22 times [2021-10-21 19:55:53,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:53,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711472814] [2021-10-21 19:55:53,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:53,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:53,829 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:53,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126547247] [2021-10-21 19:55:53,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:55:53,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:53,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:53,841 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:53,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-21 19:55:54,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:55:54,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:54,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-21 19:55:54,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:55,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:55,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711472814] [2021-10-21 19:55:55,360 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:55,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126547247] [2021-10-21 19:55:55,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126547247] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:55,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:55,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-10-21 19:55:55,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666040369] [2021-10-21 19:55:55,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-21 19:55:55,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:55,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-21 19:55:55,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-10-21 19:55:55,362 INFO L87 Difference]: Start difference. First operand 152 states and 175 transitions. Second operand has 26 states, 26 states have (on average 5.346153846153846) internal successors, (139), 25 states have internal predecessors, (139), 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) [2021-10-21 19:55:55,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:55,799 INFO L93 Difference]: Finished difference Result 162 states and 186 transitions. [2021-10-21 19:55:55,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-21 19:55:55,799 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.346153846153846) internal successors, (139), 25 states have internal predecessors, (139), 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 139 [2021-10-21 19:55:55,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:55,801 INFO L225 Difference]: With dead ends: 162 [2021-10-21 19:55:55,801 INFO L226 Difference]: Without dead ends: 158 [2021-10-21 19:55:55,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 584.7ms TimeCoverageRelationStatistics Valid=852, Invalid=1404, Unknown=0, NotChecked=0, Total=2256 [2021-10-21 19:55:55,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-21 19:55:55,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-10-21 19:55:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.1592356687898089) internal successors, (182), 157 states have internal predecessors, (182), 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) [2021-10-21 19:55:55,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 182 transitions. [2021-10-21 19:55:55,821 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 182 transitions. Word has length 139 [2021-10-21 19:55:55,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:55,821 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 182 transitions. [2021-10-21 19:55:55,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.346153846153846) internal successors, (139), 25 states have internal predecessors, (139), 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) [2021-10-21 19:55:55,822 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 182 transitions. [2021-10-21 19:55:55,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-10-21 19:55:55,823 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:55,823 INFO L512 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:55,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:56,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:56,037 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:56,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:56,037 INFO L82 PathProgramCache]: Analyzing trace with hash -2118774144, now seen corresponding path program 23 times [2021-10-21 19:55:56,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:56,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215820407] [2021-10-21 19:55:56,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:56,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:56,069 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:56,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814483891] [2021-10-21 19:55:56,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:55:56,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:56,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:56,071 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:56,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-21 19:55:58,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-10-21 19:55:58,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:58,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-21 19:55:58,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 1564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:59,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:59,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215820407] [2021-10-21 19:55:59,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:59,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814483891] [2021-10-21 19:55:59,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814483891] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:59,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:59,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-10-21 19:55:59,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352497110] [2021-10-21 19:55:59,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-21 19:55:59,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:59,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-21 19:55:59,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-10-21 19:55:59,336 INFO L87 Difference]: Start difference. First operand 158 states and 182 transitions. Second operand has 27 states, 27 states have (on average 5.37037037037037) internal successors, (145), 26 states have internal predecessors, (145), 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) [2021-10-21 19:55:59,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:59,845 INFO L93 Difference]: Finished difference Result 168 states and 193 transitions. [2021-10-21 19:55:59,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-21 19:55:59,846 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.37037037037037) internal successors, (145), 26 states have internal predecessors, (145), 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 145 [2021-10-21 19:55:59,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:59,847 INFO L225 Difference]: With dead ends: 168 [2021-10-21 19:55:59,847 INFO L226 Difference]: Without dead ends: 164 [2021-10-21 19:55:59,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 654.2ms TimeCoverageRelationStatistics Valid=925, Invalid=1525, Unknown=0, NotChecked=0, Total=2450 [2021-10-21 19:55:59,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-10-21 19:55:59,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-10-21 19:55:59,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.1595092024539877) internal successors, (189), 163 states have internal predecessors, (189), 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) [2021-10-21 19:55:59,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 189 transitions. [2021-10-21 19:55:59,867 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 189 transitions. Word has length 145 [2021-10-21 19:55:59,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:59,868 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 189 transitions. [2021-10-21 19:55:59,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.37037037037037) internal successors, (145), 26 states have internal predecessors, (145), 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) [2021-10-21 19:55:59,868 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 189 transitions. [2021-10-21 19:55:59,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-10-21 19:55:59,869 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:59,869 INFO L512 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:59,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-21 19:56:00,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-21 19:56:00,082 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:56:00,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:56:00,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1182322642, now seen corresponding path program 24 times [2021-10-21 19:56:00,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:56:00,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429205408] [2021-10-21 19:56:00,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:56:00,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:56:00,094 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:56:00,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76511551] [2021-10-21 19:56:00,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:56:00,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:56:00,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:56:00,101 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:56:00,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-21 19:56:10,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-10-21 19:56:10,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:56:10,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-21 19:56:10,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:56:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 0 proven. 1704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:56:11,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:56:11,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429205408] [2021-10-21 19:56:11,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:56:11,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76511551] [2021-10-21 19:56:11,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76511551] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:56:11,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:56:11,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-10-21 19:56:11,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783538008] [2021-10-21 19:56:11,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-21 19:56:11,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:56:11,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-21 19:56:11,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-10-21 19:56:11,383 INFO L87 Difference]: Start difference. First operand 164 states and 189 transitions. Second operand has 28 states, 28 states have (on average 5.392857142857143) internal successors, (151), 27 states have internal predecessors, (151), 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) [2021-10-21 19:56:11,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:56:11,848 INFO L93 Difference]: Finished difference Result 174 states and 200 transitions. [2021-10-21 19:56:11,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-21 19:56:11,848 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.392857142857143) internal successors, (151), 27 states have internal predecessors, (151), 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 151 [2021-10-21 19:56:11,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:56:11,850 INFO L225 Difference]: With dead ends: 174 [2021-10-21 19:56:11,850 INFO L226 Difference]: Without dead ends: 170 [2021-10-21 19:56:11,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 649.3ms TimeCoverageRelationStatistics Valid=1001, Invalid=1651, Unknown=0, NotChecked=0, Total=2652 [2021-10-21 19:56:11,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-10-21 19:56:11,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-10-21 19:56:11,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.1597633136094674) internal successors, (196), 169 states have internal predecessors, (196), 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) [2021-10-21 19:56:11,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 196 transitions. [2021-10-21 19:56:11,864 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 196 transitions. Word has length 151 [2021-10-21 19:56:11,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:56:11,864 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 196 transitions. [2021-10-21 19:56:11,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.392857142857143) internal successors, (151), 27 states have internal predecessors, (151), 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) [2021-10-21 19:56:11,864 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 196 transitions. [2021-10-21 19:56:11,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-10-21 19:56:11,865 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:56:11,865 INFO L512 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2021-10-21 19:56:11,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-10-21 19:56:12,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-21 19:56:12,066 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:56:12,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:56:12,066 INFO L82 PathProgramCache]: Analyzing trace with hash -583481436, now seen corresponding path program 25 times [2021-10-21 19:56:12,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:56:12,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110724123] [2021-10-21 19:56:12,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:56:12,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:56:12,093 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:56:12,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349755950] [2021-10-21 19:56:12,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:56:12,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:56:12,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:56:12,100 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:56:12,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-21 19:56:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:56:13,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 53 conjunts are in the unsatisfiable core [2021-10-21 19:56:13,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:56:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 0 proven. 1850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:56:13,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:56:13,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110724123] [2021-10-21 19:56:13,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:56:13,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349755950] [2021-10-21 19:56:13,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349755950] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:56:13,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:56:13,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-10-21 19:56:13,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628368091] [2021-10-21 19:56:13,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-21 19:56:13,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:56:13,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-21 19:56:13,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-10-21 19:56:13,854 INFO L87 Difference]: Start difference. First operand 170 states and 196 transitions. Second operand has 29 states, 29 states have (on average 5.413793103448276) internal successors, (157), 28 states have internal predecessors, (157), 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) [2021-10-21 19:56:14,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:56:14,321 INFO L93 Difference]: Finished difference Result 180 states and 207 transitions. [2021-10-21 19:56:14,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-21 19:56:14,322 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.413793103448276) internal successors, (157), 28 states have internal predecessors, (157), 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 157 [2021-10-21 19:56:14,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:56:14,323 INFO L225 Difference]: With dead ends: 180 [2021-10-21 19:56:14,323 INFO L226 Difference]: Without dead ends: 176 [2021-10-21 19:56:14,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 637.0ms TimeCoverageRelationStatistics Valid=1080, Invalid=1782, Unknown=0, NotChecked=0, Total=2862 [2021-10-21 19:56:14,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-10-21 19:56:14,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2021-10-21 19:56:14,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.16) internal successors, (203), 175 states have internal predecessors, (203), 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) [2021-10-21 19:56:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 203 transitions. [2021-10-21 19:56:14,343 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 203 transitions. Word has length 157 [2021-10-21 19:56:14,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:56:14,343 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 203 transitions. [2021-10-21 19:56:14,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.413793103448276) internal successors, (157), 28 states have internal predecessors, (157), 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) [2021-10-21 19:56:14,344 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 203 transitions. [2021-10-21 19:56:14,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-10-21 19:56:14,345 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:56:14,345 INFO L512 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2021-10-21 19:56:14,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-10-21 19:56:14,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:56:14,569 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:56:14,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:56:14,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1329587722, now seen corresponding path program 26 times [2021-10-21 19:56:14,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:56:14,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775441938] [2021-10-21 19:56:14,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:56:14,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:56:14,590 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:56:14,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171586050] [2021-10-21 19:56:14,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:56:14,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:56:14,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:56:14,592 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:56:14,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-21 19:56:15,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:56:15,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:56:15,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-21 19:56:15,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:56:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:56:16,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:56:16,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775441938] [2021-10-21 19:56:16,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:56:16,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171586050] [2021-10-21 19:56:16,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171586050] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:56:16,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:56:16,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-10-21 19:56:16,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740601719] [2021-10-21 19:56:16,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-21 19:56:16,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:56:16,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-21 19:56:16,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-10-21 19:56:16,509 INFO L87 Difference]: Start difference. First operand 176 states and 203 transitions. Second operand has 30 states, 30 states have (on average 5.433333333333334) internal successors, (163), 29 states have internal predecessors, (163), 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) [2021-10-21 19:56:17,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:56:17,019 INFO L93 Difference]: Finished difference Result 186 states and 214 transitions. [2021-10-21 19:56:17,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-21 19:56:17,019 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.433333333333334) internal successors, (163), 29 states have internal predecessors, (163), 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 163 [2021-10-21 19:56:17,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:56:17,021 INFO L225 Difference]: With dead ends: 186 [2021-10-21 19:56:17,021 INFO L226 Difference]: Without dead ends: 182 [2021-10-21 19:56:17,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 685.1ms TimeCoverageRelationStatistics Valid=1162, Invalid=1918, Unknown=0, NotChecked=0, Total=3080 [2021-10-21 19:56:17,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-21 19:56:17,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-10-21 19:56:17,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.160220994475138) internal successors, (210), 181 states have internal predecessors, (210), 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) [2021-10-21 19:56:17,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 210 transitions. [2021-10-21 19:56:17,037 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 210 transitions. Word has length 163 [2021-10-21 19:56:17,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:56:17,037 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 210 transitions. [2021-10-21 19:56:17,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.433333333333334) internal successors, (163), 29 states have internal predecessors, (163), 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) [2021-10-21 19:56:17,038 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 210 transitions. [2021-10-21 19:56:17,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-10-21 19:56:17,039 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:56:17,039 INFO L512 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2021-10-21 19:56:17,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-10-21 19:56:17,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-10-21 19:56:17,240 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:56:17,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:56:17,240 INFO L82 PathProgramCache]: Analyzing trace with hash 868280008, now seen corresponding path program 27 times [2021-10-21 19:56:17,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:56:17,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344590433] [2021-10-21 19:56:17,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:56:17,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:56:17,272 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:56:17,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010267062] [2021-10-21 19:56:17,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:56:17,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:56:17,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:56:17,274 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:56:17,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-21 19:56:24,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-10-21 19:56:24,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:56:24,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-21 19:56:24,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:56:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 0 proven. 2160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:56:25,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:56:25,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344590433] [2021-10-21 19:56:25,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:56:25,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010267062] [2021-10-21 19:56:25,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010267062] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:56:25,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:56:25,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-10-21 19:56:25,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157531903] [2021-10-21 19:56:25,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-21 19:56:25,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:56:25,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-21 19:56:25,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-10-21 19:56:25,189 INFO L87 Difference]: Start difference. First operand 182 states and 210 transitions. Second operand has 31 states, 31 states have (on average 5.451612903225806) internal successors, (169), 30 states have internal predecessors, (169), 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) [2021-10-21 19:56:25,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:56:25,778 INFO L93 Difference]: Finished difference Result 192 states and 221 transitions. [2021-10-21 19:56:25,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-21 19:56:25,778 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.451612903225806) internal successors, (169), 30 states have internal predecessors, (169), 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 169 [2021-10-21 19:56:25,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:56:25,780 INFO L225 Difference]: With dead ends: 192 [2021-10-21 19:56:25,780 INFO L226 Difference]: Without dead ends: 188 [2021-10-21 19:56:25,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 811.5ms TimeCoverageRelationStatistics Valid=1247, Invalid=2059, Unknown=0, NotChecked=0, Total=3306 [2021-10-21 19:56:25,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-10-21 19:56:25,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-10-21 19:56:25,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.160427807486631) internal successors, (217), 187 states have internal predecessors, (217), 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) [2021-10-21 19:56:25,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 217 transitions. [2021-10-21 19:56:25,802 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 217 transitions. Word has length 169 [2021-10-21 19:56:25,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:56:25,803 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 217 transitions. [2021-10-21 19:56:25,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.451612903225806) internal successors, (169), 30 states have internal predecessors, (169), 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) [2021-10-21 19:56:25,803 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 217 transitions. [2021-10-21 19:56:25,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-10-21 19:56:25,804 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:56:25,805 INFO L512 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2021-10-21 19:56:25,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-21 19:56:26,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-21 19:56:26,019 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:56:26,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:56:26,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1389710874, now seen corresponding path program 28 times [2021-10-21 19:56:26,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:56:26,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057302728] [2021-10-21 19:56:26,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:56:26,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:56:26,072 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:56:26,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593332949] [2021-10-21 19:56:26,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:56:26,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:56:26,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:56:26,074 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:56:26,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-21 19:56:27,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:56:27,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:56:27,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-21 19:56:27,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:56:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 0 proven. 2324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:56:28,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:56:28,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057302728] [2021-10-21 19:56:28,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:56:28,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593332949] [2021-10-21 19:56:28,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593332949] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:56:28,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:56:28,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-10-21 19:56:28,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592323822] [2021-10-21 19:56:28,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-21 19:56:28,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:56:28,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-21 19:56:28,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-10-21 19:56:28,370 INFO L87 Difference]: Start difference. First operand 188 states and 217 transitions. Second operand has 32 states, 32 states have (on average 5.46875) internal successors, (175), 31 states have internal predecessors, (175), 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) [2021-10-21 19:56:28,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:56:28,882 INFO L93 Difference]: Finished difference Result 198 states and 228 transitions. [2021-10-21 19:56:28,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-10-21 19:56:28,883 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.46875) internal successors, (175), 31 states have internal predecessors, (175), 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 175 [2021-10-21 19:56:28,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:56:28,884 INFO L225 Difference]: With dead ends: 198 [2021-10-21 19:56:28,884 INFO L226 Difference]: Without dead ends: 194 [2021-10-21 19:56:28,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 810.8ms TimeCoverageRelationStatistics Valid=1335, Invalid=2205, Unknown=0, NotChecked=0, Total=3540 [2021-10-21 19:56:28,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-10-21 19:56:28,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2021-10-21 19:56:28,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.160621761658031) internal successors, (224), 193 states have internal predecessors, (224), 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) [2021-10-21 19:56:28,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 224 transitions. [2021-10-21 19:56:28,911 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 224 transitions. Word has length 175 [2021-10-21 19:56:28,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:56:28,911 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 224 transitions. [2021-10-21 19:56:28,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.46875) internal successors, (175), 31 states have internal predecessors, (175), 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) [2021-10-21 19:56:28,912 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 224 transitions. [2021-10-21 19:56:28,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-10-21 19:56:28,913 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:56:28,913 INFO L512 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2021-10-21 19:56:28,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-10-21 19:56:29,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-10-21 19:56:29,125 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:56:29,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:56:29,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1719627756, now seen corresponding path program 29 times [2021-10-21 19:56:29,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:56:29,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879621178] [2021-10-21 19:56:29,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:56:29,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:56:29,142 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:56:29,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624381122] [2021-10-21 19:56:29,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:56:29,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:56:29,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:56:29,144 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:56:29,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-21 19:56:46,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-10-21 19:56:46,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:56:46,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-21 19:56:46,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:56:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 0 proven. 2494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:56:47,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:56:47,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879621178] [2021-10-21 19:56:47,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:56:47,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624381122] [2021-10-21 19:56:47,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624381122] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:56:47,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:56:47,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-10-21 19:56:47,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349438278] [2021-10-21 19:56:47,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-21 19:56:47,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:56:47,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-21 19:56:47,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 19:56:47,223 INFO L87 Difference]: Start difference. First operand 194 states and 224 transitions. Second operand has 33 states, 33 states have (on average 5.484848484848484) internal successors, (181), 32 states have internal predecessors, (181), 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) [2021-10-21 19:56:47,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:56:47,766 INFO L93 Difference]: Finished difference Result 204 states and 235 transitions. [2021-10-21 19:56:47,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-10-21 19:56:47,766 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.484848484848484) internal successors, (181), 32 states have internal predecessors, (181), 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 181 [2021-10-21 19:56:47,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:56:47,768 INFO L225 Difference]: With dead ends: 204 [2021-10-21 19:56:47,768 INFO L226 Difference]: Without dead ends: 200 [2021-10-21 19:56:47,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 790.3ms TimeCoverageRelationStatistics Valid=1426, Invalid=2356, Unknown=0, NotChecked=0, Total=3782 [2021-10-21 19:56:47,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-10-21 19:56:47,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2021-10-21 19:56:47,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.1608040201005025) internal successors, (231), 199 states have internal predecessors, (231), 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) [2021-10-21 19:56:47,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 231 transitions. [2021-10-21 19:56:47,789 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 231 transitions. Word has length 181 [2021-10-21 19:56:47,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:56:47,789 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 231 transitions. [2021-10-21 19:56:47,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.484848484848484) internal successors, (181), 32 states have internal predecessors, (181), 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) [2021-10-21 19:56:47,790 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 231 transitions. [2021-10-21 19:56:47,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-10-21 19:56:47,791 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:56:47,791 INFO L512 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2021-10-21 19:56:47,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-21 19:56:48,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:56:48,010 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:56:48,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:56:48,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1524011970, now seen corresponding path program 30 times [2021-10-21 19:56:48,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:56:48,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396407046] [2021-10-21 19:56:48,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:56:48,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:56:48,048 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:56:48,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418210487] [2021-10-21 19:56:48,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:56:48,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:56:48,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:56:48,069 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:56:48,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-21 19:56:57,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-10-21 19:56:57,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:56:57,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 63 conjunts are in the unsatisfiable core [2021-10-21 19:56:57,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:56:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:56:58,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:56:58,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396407046] [2021-10-21 19:56:58,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:56:58,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418210487] [2021-10-21 19:56:58,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418210487] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:56:58,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:56:58,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-10-21 19:56:58,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734556315] [2021-10-21 19:56:58,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-21 19:56:58,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:56:58,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-21 19:56:58,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-10-21 19:56:58,191 INFO L87 Difference]: Start difference. First operand 200 states and 231 transitions. Second operand has 34 states, 34 states have (on average 5.5) internal successors, (187), 33 states have internal predecessors, (187), 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) [2021-10-21 19:56:58,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:56:58,779 INFO L93 Difference]: Finished difference Result 210 states and 242 transitions. [2021-10-21 19:56:58,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-10-21 19:56:58,779 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.5) internal successors, (187), 33 states have internal predecessors, (187), 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 187 [2021-10-21 19:56:58,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:56:58,780 INFO L225 Difference]: With dead ends: 210 [2021-10-21 19:56:58,780 INFO L226 Difference]: Without dead ends: 206 [2021-10-21 19:56:58,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 866.4ms TimeCoverageRelationStatistics Valid=1520, Invalid=2512, Unknown=0, NotChecked=0, Total=4032 [2021-10-21 19:56:58,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-10-21 19:56:58,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-10-21 19:56:58,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.1609756097560975) internal successors, (238), 205 states have internal predecessors, (238), 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) [2021-10-21 19:56:58,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 238 transitions. [2021-10-21 19:56:58,804 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 238 transitions. Word has length 187 [2021-10-21 19:56:58,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:56:58,804 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 238 transitions. [2021-10-21 19:56:58,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.5) internal successors, (187), 33 states have internal predecessors, (187), 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) [2021-10-21 19:56:58,805 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 238 transitions. [2021-10-21 19:56:58,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-10-21 19:56:58,806 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:56:58,807 INFO L512 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2021-10-21 19:56:58,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-21 19:56:59,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:56:59,013 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:56:59,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:56:59,013 INFO L82 PathProgramCache]: Analyzing trace with hash 354771728, now seen corresponding path program 31 times [2021-10-21 19:56:59,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:56:59,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208240981] [2021-10-21 19:56:59,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:56:59,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:56:59,028 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:56:59,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116544540] [2021-10-21 19:56:59,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:56:59,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:56:59,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:56:59,032 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:56:59,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-21 19:57:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:57:00,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-21 19:57:00,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:57:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 0 proven. 2852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:57:01,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:57:01,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208240981] [2021-10-21 19:57:01,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:57:01,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116544540] [2021-10-21 19:57:01,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116544540] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:57:01,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:57:01,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-10-21 19:57:01,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690525683] [2021-10-21 19:57:01,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-21 19:57:01,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:57:01,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-21 19:57:01,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 19:57:01,403 INFO L87 Difference]: Start difference. First operand 206 states and 238 transitions. Second operand has 35 states, 35 states have (on average 5.514285714285714) internal successors, (193), 34 states have internal predecessors, (193), 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) [2021-10-21 19:57:02,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:57:02,146 INFO L93 Difference]: Finished difference Result 216 states and 249 transitions. [2021-10-21 19:57:02,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-10-21 19:57:02,147 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.514285714285714) internal successors, (193), 34 states have internal predecessors, (193), 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 193 [2021-10-21 19:57:02,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:57:02,148 INFO L225 Difference]: With dead ends: 216 [2021-10-21 19:57:02,148 INFO L226 Difference]: Without dead ends: 212 [2021-10-21 19:57:02,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1003.3ms TimeCoverageRelationStatistics Valid=1617, Invalid=2673, Unknown=0, NotChecked=0, Total=4290 [2021-10-21 19:57:02,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-10-21 19:57:02,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-10-21 19:57:02,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.161137440758294) internal successors, (245), 211 states have internal predecessors, (245), 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) [2021-10-21 19:57:02,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 245 transitions. [2021-10-21 19:57:02,175 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 245 transitions. Word has length 193 [2021-10-21 19:57:02,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:57:02,175 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 245 transitions. [2021-10-21 19:57:02,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.514285714285714) internal successors, (193), 34 states have internal predecessors, (193), 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) [2021-10-21 19:57:02,176 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 245 transitions. [2021-10-21 19:57:02,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-10-21 19:57:02,178 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:02,178 INFO L512 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2021-10-21 19:57:02,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-21 19:57:02,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:57:02,391 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:02,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:02,392 INFO L82 PathProgramCache]: Analyzing trace with hash -22186910, now seen corresponding path program 32 times [2021-10-21 19:57:02,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:02,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246758713] [2021-10-21 19:57:02,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:02,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:02,419 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:57:02,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314312429] [2021-10-21 19:57:02,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:57:02,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:57:02,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:57:02,421 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:57:02,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-21 19:57:03,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:57:03,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:57:03,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 67 conjunts are in the unsatisfiable core [2021-10-21 19:57:03,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:57:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 0 proven. 3040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:57:04,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:57:04,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246758713] [2021-10-21 19:57:04,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:57:04,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314312429] [2021-10-21 19:57:04,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314312429] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:57:04,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:57:04,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-10-21 19:57:04,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779022906] [2021-10-21 19:57:04,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-21 19:57:04,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:57:04,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-21 19:57:04,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-10-21 19:57:04,902 INFO L87 Difference]: Start difference. First operand 212 states and 245 transitions. Second operand has 36 states, 36 states have (on average 5.527777777777778) internal successors, (199), 35 states have internal predecessors, (199), 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) [2021-10-21 19:57:05,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:57:05,537 INFO L93 Difference]: Finished difference Result 222 states and 256 transitions. [2021-10-21 19:57:05,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-10-21 19:57:05,538 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.527777777777778) internal successors, (199), 35 states have internal predecessors, (199), 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 199 [2021-10-21 19:57:05,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:57:05,539 INFO L225 Difference]: With dead ends: 222 [2021-10-21 19:57:05,539 INFO L226 Difference]: Without dead ends: 218 [2021-10-21 19:57:05,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 939.5ms TimeCoverageRelationStatistics Valid=1717, Invalid=2839, Unknown=0, NotChecked=0, Total=4556 [2021-10-21 19:57:05,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-10-21 19:57:05,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-10-21 19:57:05,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.1612903225806452) internal successors, (252), 217 states have internal predecessors, (252), 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) [2021-10-21 19:57:05,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 252 transitions. [2021-10-21 19:57:05,562 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 252 transitions. Word has length 199 [2021-10-21 19:57:05,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:57:05,562 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 252 transitions. [2021-10-21 19:57:05,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.527777777777778) internal successors, (199), 35 states have internal predecessors, (199), 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) [2021-10-21 19:57:05,563 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 252 transitions. [2021-10-21 19:57:05,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-10-21 19:57:05,564 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:05,564 INFO L512 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2021-10-21 19:57:05,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-21 19:57:05,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-21 19:57:05,777 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:05,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:05,780 INFO L82 PathProgramCache]: Analyzing trace with hash -572276684, now seen corresponding path program 33 times [2021-10-21 19:57:05,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:05,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104414919] [2021-10-21 19:57:05,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:05,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:05,800 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:57:05,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133464061] [2021-10-21 19:57:05,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:57:05,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:57:05,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:57:05,802 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:57:05,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-21 19:57:08,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-10-21 19:57:08,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:57:08,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 69 conjunts are in the unsatisfiable core [2021-10-21 19:57:08,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:57:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3234 backedges. 0 proven. 3234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:57:09,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:57:09,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104414919] [2021-10-21 19:57:09,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:57:09,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133464061] [2021-10-21 19:57:09,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133464061] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:57:09,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:57:09,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-10-21 19:57:09,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122425452] [2021-10-21 19:57:09,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-21 19:57:09,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:57:09,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-21 19:57:09,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-10-21 19:57:09,671 INFO L87 Difference]: Start difference. First operand 218 states and 252 transitions. Second operand has 37 states, 37 states have (on average 5.54054054054054) internal successors, (205), 36 states have internal predecessors, (205), 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) [2021-10-21 19:57:10,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:57:10,365 INFO L93 Difference]: Finished difference Result 228 states and 263 transitions. [2021-10-21 19:57:10,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-10-21 19:57:10,365 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.54054054054054) internal successors, (205), 36 states have internal predecessors, (205), 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 205 [2021-10-21 19:57:10,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:57:10,366 INFO L225 Difference]: With dead ends: 228 [2021-10-21 19:57:10,366 INFO L226 Difference]: Without dead ends: 224 [2021-10-21 19:57:10,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1143.4ms TimeCoverageRelationStatistics Valid=1820, Invalid=3010, Unknown=0, NotChecked=0, Total=4830 [2021-10-21 19:57:10,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-10-21 19:57:10,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2021-10-21 19:57:10,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.1614349775784754) internal successors, (259), 223 states have internal predecessors, (259), 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) [2021-10-21 19:57:10,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 259 transitions. [2021-10-21 19:57:10,389 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 259 transitions. Word has length 205 [2021-10-21 19:57:10,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:57:10,390 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 259 transitions. [2021-10-21 19:57:10,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.54054054054054) internal successors, (205), 36 states have internal predecessors, (205), 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) [2021-10-21 19:57:10,390 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 259 transitions. [2021-10-21 19:57:10,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-10-21 19:57:10,392 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:10,392 INFO L512 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2021-10-21 19:57:10,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-21 19:57:10,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-21 19:57:10,605 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:10,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:10,606 INFO L82 PathProgramCache]: Analyzing trace with hash -724408698, now seen corresponding path program 34 times [2021-10-21 19:57:10,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:10,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326097306] [2021-10-21 19:57:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:10,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:10,636 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:57:10,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175164584] [2021-10-21 19:57:10,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:57:10,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:57:10,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:57:10,648 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:57:10,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-21 19:57:12,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:57:12,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:57:12,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 71 conjunts are in the unsatisfiable core [2021-10-21 19:57:12,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:57:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 0 proven. 3434 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:57:13,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:57:13,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326097306] [2021-10-21 19:57:13,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:57:13,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175164584] [2021-10-21 19:57:13,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175164584] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:57:13,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:57:13,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2021-10-21 19:57:13,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221675967] [2021-10-21 19:57:13,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-21 19:57:13,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:57:13,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-21 19:57:13,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-10-21 19:57:13,608 INFO L87 Difference]: Start difference. First operand 224 states and 259 transitions. Second operand has 38 states, 38 states have (on average 5.552631578947368) internal successors, (211), 37 states have internal predecessors, (211), 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) [2021-10-21 19:57:14,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:57:14,353 INFO L93 Difference]: Finished difference Result 234 states and 270 transitions. [2021-10-21 19:57:14,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-10-21 19:57:14,354 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.552631578947368) internal successors, (211), 37 states have internal predecessors, (211), 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 211 [2021-10-21 19:57:14,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:57:14,355 INFO L225 Difference]: With dead ends: 234 [2021-10-21 19:57:14,355 INFO L226 Difference]: Without dead ends: 230 [2021-10-21 19:57:14,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1109.7ms TimeCoverageRelationStatistics Valid=1926, Invalid=3186, Unknown=0, NotChecked=0, Total=5112 [2021-10-21 19:57:14,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-10-21 19:57:14,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2021-10-21 19:57:14,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.1615720524017468) internal successors, (266), 229 states have internal predecessors, (266), 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) [2021-10-21 19:57:14,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 266 transitions. [2021-10-21 19:57:14,370 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 266 transitions. Word has length 211 [2021-10-21 19:57:14,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:57:14,370 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 266 transitions. [2021-10-21 19:57:14,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.552631578947368) internal successors, (211), 37 states have internal predecessors, (211), 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) [2021-10-21 19:57:14,371 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 266 transitions. [2021-10-21 19:57:14,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-10-21 19:57:14,372 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:14,372 INFO L512 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2021-10-21 19:57:14,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-10-21 19:57:14,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-21 19:57:14,573 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:14,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:14,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1653897384, now seen corresponding path program 35 times [2021-10-21 19:57:14,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:14,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369936839] [2021-10-21 19:57:14,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:14,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:14,591 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:57:14,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663515602] [2021-10-21 19:57:14,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:57:14,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:57:14,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:57:14,609 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:57:14,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-21 19:57:17,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-10-21 19:57:17,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:57:17,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 73 conjunts are in the unsatisfiable core [2021-10-21 19:57:17,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:57:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3640 backedges. 0 proven. 3640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:57:18,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:57:18,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369936839] [2021-10-21 19:57:18,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:57:18,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663515602] [2021-10-21 19:57:18,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663515602] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:57:18,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:57:18,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-10-21 19:57:18,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647869801] [2021-10-21 19:57:18,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-21 19:57:18,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:57:18,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-21 19:57:18,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-10-21 19:57:18,930 INFO L87 Difference]: Start difference. First operand 230 states and 266 transitions. Second operand has 39 states, 39 states have (on average 5.564102564102564) internal successors, (217), 38 states have internal predecessors, (217), 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) [2021-10-21 19:57:19,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:57:19,712 INFO L93 Difference]: Finished difference Result 240 states and 277 transitions. [2021-10-21 19:57:19,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-10-21 19:57:19,712 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.564102564102564) internal successors, (217), 38 states have internal predecessors, (217), 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 217 [2021-10-21 19:57:19,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:57:19,714 INFO L225 Difference]: With dead ends: 240 [2021-10-21 19:57:19,714 INFO L226 Difference]: Without dead ends: 236 [2021-10-21 19:57:19,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1188.2ms TimeCoverageRelationStatistics Valid=2035, Invalid=3367, Unknown=0, NotChecked=0, Total=5402 [2021-10-21 19:57:19,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-10-21 19:57:19,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-10-21 19:57:19,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.1617021276595745) internal successors, (273), 235 states have internal predecessors, (273), 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) [2021-10-21 19:57:19,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 273 transitions. [2021-10-21 19:57:19,729 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 273 transitions. Word has length 217 [2021-10-21 19:57:19,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:57:19,730 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 273 transitions. [2021-10-21 19:57:19,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.564102564102564) internal successors, (217), 38 states have internal predecessors, (217), 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) [2021-10-21 19:57:19,730 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 273 transitions. [2021-10-21 19:57:19,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-10-21 19:57:19,731 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:19,731 INFO L512 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2021-10-21 19:57:19,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-10-21 19:57:19,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:57:19,933 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:19,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:19,933 INFO L82 PathProgramCache]: Analyzing trace with hash -74890582, now seen corresponding path program 36 times [2021-10-21 19:57:19,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:19,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795714919] [2021-10-21 19:57:19,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:19,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:19,952 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:57:19,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087416671] [2021-10-21 19:57:19,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:57:19,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:57:19,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:57:19,953 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:57:19,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-21 19:57:40,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-10-21 19:57:40,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:57:40,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 75 conjunts are in the unsatisfiable core [2021-10-21 19:57:40,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:57:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 0 proven. 3852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:57:42,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:57:42,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795714919] [2021-10-21 19:57:42,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:57:42,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087416671] [2021-10-21 19:57:42,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087416671] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:57:42,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:57:42,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-10-21 19:57:42,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279035391] [2021-10-21 19:57:42,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-21 19:57:42,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:57:42,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-21 19:57:42,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-10-21 19:57:42,159 INFO L87 Difference]: Start difference. First operand 236 states and 273 transitions. Second operand has 40 states, 40 states have (on average 5.575) internal successors, (223), 39 states have internal predecessors, (223), 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) [2021-10-21 19:57:42,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:57:42,930 INFO L93 Difference]: Finished difference Result 246 states and 284 transitions. [2021-10-21 19:57:42,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-10-21 19:57:42,930 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.575) internal successors, (223), 39 states have internal predecessors, (223), 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 223 [2021-10-21 19:57:42,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:57:42,932 INFO L225 Difference]: With dead ends: 246 [2021-10-21 19:57:42,932 INFO L226 Difference]: Without dead ends: 242 [2021-10-21 19:57:42,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1225.7ms TimeCoverageRelationStatistics Valid=2147, Invalid=3553, Unknown=0, NotChecked=0, Total=5700 [2021-10-21 19:57:42,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-21 19:57:42,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2021-10-21 19:57:42,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.161825726141079) internal successors, (280), 241 states have internal predecessors, (280), 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) [2021-10-21 19:57:42,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 280 transitions. [2021-10-21 19:57:42,957 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 280 transitions. Word has length 223 [2021-10-21 19:57:42,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:57:42,957 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 280 transitions. [2021-10-21 19:57:42,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.575) internal successors, (223), 39 states have internal predecessors, (223), 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) [2021-10-21 19:57:42,958 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 280 transitions. [2021-10-21 19:57:42,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-10-21 19:57:42,959 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:42,959 INFO L512 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2021-10-21 19:57:42,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-10-21 19:57:43,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:57:43,173 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:43,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:43,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1360152452, now seen corresponding path program 37 times [2021-10-21 19:57:43,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:43,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664226721] [2021-10-21 19:57:43,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:43,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:43,193 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:57:43,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792343049] [2021-10-21 19:57:43,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:57:43,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:57:43,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:57:43,195 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:57:43,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-21 19:57:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:57:45,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 77 conjunts are in the unsatisfiable core [2021-10-21 19:57:45,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:57:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4070 backedges. 0 proven. 4070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:57:46,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:57:46,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664226721] [2021-10-21 19:57:46,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:57:46,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792343049] [2021-10-21 19:57:46,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792343049] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:57:46,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:57:46,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2021-10-21 19:57:46,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719668315] [2021-10-21 19:57:46,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-21 19:57:46,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:57:46,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-21 19:57:46,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-10-21 19:57:46,430 INFO L87 Difference]: Start difference. First operand 242 states and 280 transitions. Second operand has 41 states, 41 states have (on average 5.585365853658536) internal successors, (229), 40 states have internal predecessors, (229), 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) [2021-10-21 19:57:47,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:57:47,311 INFO L93 Difference]: Finished difference Result 252 states and 291 transitions. [2021-10-21 19:57:47,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-10-21 19:57:47,312 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.585365853658536) internal successors, (229), 40 states have internal predecessors, (229), 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 229 [2021-10-21 19:57:47,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:57:47,313 INFO L225 Difference]: With dead ends: 252 [2021-10-21 19:57:47,313 INFO L226 Difference]: Without dead ends: 248 [2021-10-21 19:57:47,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1346.2ms TimeCoverageRelationStatistics Valid=2262, Invalid=3744, Unknown=0, NotChecked=0, Total=6006 [2021-10-21 19:57:47,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-10-21 19:57:47,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2021-10-21 19:57:47,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.1619433198380567) internal successors, (287), 247 states have internal predecessors, (287), 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) [2021-10-21 19:57:47,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 287 transitions. [2021-10-21 19:57:47,348 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 287 transitions. Word has length 229 [2021-10-21 19:57:47,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:57:47,348 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 287 transitions. [2021-10-21 19:57:47,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.585365853658536) internal successors, (229), 40 states have internal predecessors, (229), 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) [2021-10-21 19:57:47,348 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 287 transitions. [2021-10-21 19:57:47,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-10-21 19:57:47,350 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:47,350 INFO L512 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2021-10-21 19:57:47,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-10-21 19:57:47,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-10-21 19:57:47,561 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:47,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:47,561 INFO L82 PathProgramCache]: Analyzing trace with hash -448591666, now seen corresponding path program 38 times [2021-10-21 19:57:47,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:47,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827387359] [2021-10-21 19:57:47,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:47,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:47,607 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:57:47,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458884165] [2021-10-21 19:57:47,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:57:47,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:57:47,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:57:47,609 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:57:47,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-10-21 19:57:49,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:57:49,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:57:49,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 79 conjunts are in the unsatisfiable core [2021-10-21 19:57:49,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:57:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 0 proven. 4294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:57:51,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:57:51,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827387359] [2021-10-21 19:57:51,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:57:51,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458884165] [2021-10-21 19:57:51,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458884165] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:57:51,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:57:51,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-10-21 19:57:51,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211470683] [2021-10-21 19:57:51,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-21 19:57:51,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:57:51,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-21 19:57:51,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-10-21 19:57:51,057 INFO L87 Difference]: Start difference. First operand 248 states and 287 transitions. Second operand has 42 states, 42 states have (on average 5.595238095238095) internal successors, (235), 41 states have internal predecessors, (235), 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) [2021-10-21 19:57:51,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:57:51,946 INFO L93 Difference]: Finished difference Result 258 states and 298 transitions. [2021-10-21 19:57:51,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-10-21 19:57:51,947 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 5.595238095238095) internal successors, (235), 41 states have internal predecessors, (235), 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 235 [2021-10-21 19:57:51,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:57:51,948 INFO L225 Difference]: With dead ends: 258 [2021-10-21 19:57:51,948 INFO L226 Difference]: Without dead ends: 254 [2021-10-21 19:57:51,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1359.6ms TimeCoverageRelationStatistics Valid=2380, Invalid=3940, Unknown=0, NotChecked=0, Total=6320 [2021-10-21 19:57:51,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-10-21 19:57:51,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-10-21 19:57:51,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.1620553359683794) internal successors, (294), 253 states have internal predecessors, (294), 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) [2021-10-21 19:57:51,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 294 transitions. [2021-10-21 19:57:51,968 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 294 transitions. Word has length 235 [2021-10-21 19:57:51,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:57:51,969 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 294 transitions. [2021-10-21 19:57:51,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.595238095238095) internal successors, (235), 41 states have internal predecessors, (235), 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) [2021-10-21 19:57:51,969 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 294 transitions. [2021-10-21 19:57:51,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-10-21 19:57:51,971 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:51,971 INFO L512 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2021-10-21 19:57:52,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-10-21 19:57:52,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:57:52,181 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:52,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:52,181 INFO L82 PathProgramCache]: Analyzing trace with hash 739988384, now seen corresponding path program 39 times [2021-10-21 19:57:52,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:52,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380953137] [2021-10-21 19:57:52,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:52,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:52,201 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:57:52,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446821667] [2021-10-21 19:57:52,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:57:52,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:57:52,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:57:52,203 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:57:52,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-10-21 19:57:58,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-10-21 19:57:58,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:57:59,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 81 conjunts are in the unsatisfiable core [2021-10-21 19:57:59,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:58:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4524 backedges. 0 proven. 4524 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:00,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:00,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380953137] [2021-10-21 19:58:00,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:58:00,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446821667] [2021-10-21 19:58:00,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446821667] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:58:00,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:58:00,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2021-10-21 19:58:00,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847340368] [2021-10-21 19:58:00,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-21 19:58:00,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:00,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-21 19:58:00,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-10-21 19:58:00,519 INFO L87 Difference]: Start difference. First operand 254 states and 294 transitions. Second operand has 43 states, 43 states have (on average 5.604651162790698) internal successors, (241), 42 states have internal predecessors, (241), 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) [2021-10-21 19:58:01,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:01,403 INFO L93 Difference]: Finished difference Result 264 states and 305 transitions. [2021-10-21 19:58:01,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-10-21 19:58:01,403 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.604651162790698) internal successors, (241), 42 states have internal predecessors, (241), 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 241 [2021-10-21 19:58:01,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:01,405 INFO L225 Difference]: With dead ends: 264 [2021-10-21 19:58:01,405 INFO L226 Difference]: Without dead ends: 260 [2021-10-21 19:58:01,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1460.1ms TimeCoverageRelationStatistics Valid=2501, Invalid=4141, Unknown=0, NotChecked=0, Total=6642 [2021-10-21 19:58:01,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-10-21 19:58:01,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2021-10-21 19:58:01,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.162162162162162) internal successors, (301), 259 states have internal predecessors, (301), 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) [2021-10-21 19:58:01,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 301 transitions. [2021-10-21 19:58:01,424 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 301 transitions. Word has length 241 [2021-10-21 19:58:01,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:01,424 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 301 transitions. [2021-10-21 19:58:01,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.604651162790698) internal successors, (241), 42 states have internal predecessors, (241), 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) [2021-10-21 19:58:01,425 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 301 transitions. [2021-10-21 19:58:01,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-10-21 19:58:01,426 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:01,427 INFO L512 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:01,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-10-21 19:58:01,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:58:01,637 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:01,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:01,637 INFO L82 PathProgramCache]: Analyzing trace with hash -487540494, now seen corresponding path program 40 times [2021-10-21 19:58:01,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:01,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416760695] [2021-10-21 19:58:01,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:01,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:01,657 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:58:01,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040292006] [2021-10-21 19:58:01,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:58:01,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:58:01,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:58:01,659 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:58:01,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-10-21 19:58:03,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:58:03,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:58:03,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-21 19:58:03,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:58:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 0 proven. 4760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:05,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:05,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416760695] [2021-10-21 19:58:05,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:58:05,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040292006] [2021-10-21 19:58:05,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040292006] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:58:05,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:58:05,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2021-10-21 19:58:05,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882693754] [2021-10-21 19:58:05,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-21 19:58:05,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:05,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-21 19:58:05,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-10-21 19:58:05,354 INFO L87 Difference]: Start difference. First operand 260 states and 301 transitions. Second operand has 44 states, 44 states have (on average 5.613636363636363) internal successors, (247), 43 states have internal predecessors, (247), 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) [2021-10-21 19:58:06,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:06,343 INFO L93 Difference]: Finished difference Result 270 states and 312 transitions. [2021-10-21 19:58:06,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-10-21 19:58:06,349 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 5.613636363636363) internal successors, (247), 43 states have internal predecessors, (247), 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 247 [2021-10-21 19:58:06,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:06,352 INFO L225 Difference]: With dead ends: 270 [2021-10-21 19:58:06,352 INFO L226 Difference]: Without dead ends: 266 [2021-10-21 19:58:06,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1546.1ms TimeCoverageRelationStatistics Valid=2625, Invalid=4347, Unknown=0, NotChecked=0, Total=6972 [2021-10-21 19:58:06,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-10-21 19:58:06,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2021-10-21 19:58:06,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.1622641509433962) internal successors, (308), 265 states have internal predecessors, (308), 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) [2021-10-21 19:58:06,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 308 transitions. [2021-10-21 19:58:06,378 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 308 transitions. Word has length 247 [2021-10-21 19:58:06,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:06,379 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 308 transitions. [2021-10-21 19:58:06,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.613636363636363) internal successors, (247), 43 states have internal predecessors, (247), 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) [2021-10-21 19:58:06,379 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 308 transitions. [2021-10-21 19:58:06,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-10-21 19:58:06,381 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:06,381 INFO L512 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:06,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-10-21 19:58:06,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-10-21 19:58:06,597 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:06,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:06,597 INFO L82 PathProgramCache]: Analyzing trace with hash 757422276, now seen corresponding path program 41 times [2021-10-21 19:58:06,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:06,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702156260] [2021-10-21 19:58:06,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:06,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:06,618 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:58:06,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129229595] [2021-10-21 19:58:06,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:58:06,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:58:06,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:58:06,621 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:58:06,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-10-21 19:58:52,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-10-21 19:58:52,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:58:52,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 85 conjunts are in the unsatisfiable core [2021-10-21 19:58:52,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:58:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5002 backedges. 0 proven. 5002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:54,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:54,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702156260] [2021-10-21 19:58:54,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:58:54,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129229595] [2021-10-21 19:58:54,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129229595] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:58:54,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:58:54,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2021-10-21 19:58:54,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315667590] [2021-10-21 19:58:54,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-21 19:58:54,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:54,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-21 19:58:54,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-10-21 19:58:54,011 INFO L87 Difference]: Start difference. First operand 266 states and 308 transitions. Second operand has 45 states, 45 states have (on average 5.622222222222222) internal successors, (253), 44 states have internal predecessors, (253), 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) [2021-10-21 19:58:55,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:55,047 INFO L93 Difference]: Finished difference Result 276 states and 319 transitions. [2021-10-21 19:58:55,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-10-21 19:58:55,047 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 5.622222222222222) internal successors, (253), 44 states have internal predecessors, (253), 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 253 [2021-10-21 19:58:55,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:55,048 INFO L225 Difference]: With dead ends: 276 [2021-10-21 19:58:55,048 INFO L226 Difference]: Without dead ends: 272 [2021-10-21 19:58:55,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1753.5ms TimeCoverageRelationStatistics Valid=2752, Invalid=4558, Unknown=0, NotChecked=0, Total=7310 [2021-10-21 19:58:55,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-10-21 19:58:55,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2021-10-21 19:58:55,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.1623616236162362) internal successors, (315), 271 states have internal predecessors, (315), 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) [2021-10-21 19:58:55,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 315 transitions. [2021-10-21 19:58:55,076 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 315 transitions. Word has length 253 [2021-10-21 19:58:55,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:55,077 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 315 transitions. [2021-10-21 19:58:55,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.622222222222222) internal successors, (253), 44 states have internal predecessors, (253), 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) [2021-10-21 19:58:55,077 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 315 transitions. [2021-10-21 19:58:55,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-10-21 19:58:55,079 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:55,079 INFO L512 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:55,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-10-21 19:58:55,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-10-21 19:58:55,289 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:55,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:55,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1677939478, now seen corresponding path program 42 times [2021-10-21 19:58:55,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:55,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362806679] [2021-10-21 19:58:55,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:55,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:55,313 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:58:55,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737432303] [2021-10-21 19:58:55,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:58:55,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:58:55,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:58:55,315 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:58:55,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-10-21 19:59:37,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-10-21 19:59:37,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:59:37,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 87 conjunts are in the unsatisfiable core [2021-10-21 19:59:37,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:59:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5250 backedges. 0 proven. 5250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:59:39,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:39,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362806679] [2021-10-21 19:59:39,085 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:59:39,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737432303] [2021-10-21 19:59:39,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737432303] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:59:39,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:59:39,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2021-10-21 19:59:39,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637835630] [2021-10-21 19:59:39,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-21 19:59:39,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:39,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-21 19:59:39,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-10-21 19:59:39,087 INFO L87 Difference]: Start difference. First operand 272 states and 315 transitions. Second operand has 46 states, 46 states have (on average 5.630434782608695) internal successors, (259), 45 states have internal predecessors, (259), 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) [2021-10-21 19:59:40,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:40,135 INFO L93 Difference]: Finished difference Result 282 states and 326 transitions. [2021-10-21 19:59:40,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-10-21 19:59:40,135 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 5.630434782608695) internal successors, (259), 45 states have internal predecessors, (259), 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 259 [2021-10-21 19:59:40,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:40,137 INFO L225 Difference]: With dead ends: 282 [2021-10-21 19:59:40,137 INFO L226 Difference]: Without dead ends: 278 [2021-10-21 19:59:40,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1576.3ms TimeCoverageRelationStatistics Valid=2882, Invalid=4774, Unknown=0, NotChecked=0, Total=7656 [2021-10-21 19:59:40,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-10-21 19:59:40,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2021-10-21 19:59:40,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 1.1624548736462095) internal successors, (322), 277 states have internal predecessors, (322), 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) [2021-10-21 19:59:40,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 322 transitions. [2021-10-21 19:59:40,161 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 322 transitions. Word has length 259 [2021-10-21 19:59:40,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:40,161 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 322 transitions. [2021-10-21 19:59:40,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 5.630434782608695) internal successors, (259), 45 states have internal predecessors, (259), 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) [2021-10-21 19:59:40,162 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 322 transitions. [2021-10-21 19:59:40,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-10-21 19:59:40,164 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:40,164 INFO L512 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:40,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-10-21 19:59:40,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-10-21 19:59:40,377 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:40,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:40,377 INFO L82 PathProgramCache]: Analyzing trace with hash 146589672, now seen corresponding path program 43 times [2021-10-21 19:59:40,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:40,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402731130] [2021-10-21 19:59:40,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:40,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:40,428 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:59:40,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243130782] [2021-10-21 19:59:40,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:59:40,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:59:40,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:59:40,429 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:59:40,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-10-21 19:59:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:42,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 1009 conjuncts, 89 conjunts are in the unsatisfiable core [2021-10-21 19:59:42,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:59:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5504 backedges. 0 proven. 5504 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:59:44,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:44,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402731130] [2021-10-21 19:59:44,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:59:44,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243130782] [2021-10-21 19:59:44,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243130782] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:59:44,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:59:44,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-10-21 19:59:44,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684062925] [2021-10-21 19:59:44,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-10-21 19:59:44,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:44,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-10-21 19:59:44,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-10-21 19:59:44,337 INFO L87 Difference]: Start difference. First operand 278 states and 322 transitions. Second operand has 47 states, 47 states have (on average 5.638297872340425) internal successors, (265), 46 states have internal predecessors, (265), 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) [2021-10-21 19:59:45,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:45,435 INFO L93 Difference]: Finished difference Result 288 states and 333 transitions. [2021-10-21 19:59:45,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-10-21 19:59:45,436 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 5.638297872340425) internal successors, (265), 46 states have internal predecessors, (265), 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 265 [2021-10-21 19:59:45,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:45,438 INFO L225 Difference]: With dead ends: 288 [2021-10-21 19:59:45,438 INFO L226 Difference]: Without dead ends: 284 [2021-10-21 19:59:45,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 1708.7ms TimeCoverageRelationStatistics Valid=3015, Invalid=4995, Unknown=0, NotChecked=0, Total=8010 [2021-10-21 19:59:45,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-10-21 19:59:45,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2021-10-21 19:59:45,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.1625441696113075) internal successors, (329), 283 states have internal predecessors, (329), 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) [2021-10-21 19:59:45,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 329 transitions. [2021-10-21 19:59:45,464 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 329 transitions. Word has length 265 [2021-10-21 19:59:45,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:45,464 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 329 transitions. [2021-10-21 19:59:45,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 5.638297872340425) internal successors, (265), 46 states have internal predecessors, (265), 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) [2021-10-21 19:59:45,464 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 329 transitions. [2021-10-21 19:59:45,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-10-21 19:59:45,465 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:45,465 INFO L512 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:45,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-10-21 19:59:45,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-10-21 19:59:45,666 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:45,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:45,667 INFO L82 PathProgramCache]: Analyzing trace with hash 913037114, now seen corresponding path program 44 times [2021-10-21 19:59:45,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:45,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561892331] [2021-10-21 19:59:45,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:45,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:45,690 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:59:45,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146389039] [2021-10-21 19:59:45,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:59:45,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:59:45,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:59:45,693 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:59:45,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-10-21 19:59:48,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:59:48,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:59:48,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 91 conjunts are in the unsatisfiable core [2021-10-21 19:59:48,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:59:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5764 backedges. 0 proven. 5764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:59:49,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:49,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561892331] [2021-10-21 19:59:49,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:59:49,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146389039] [2021-10-21 19:59:49,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146389039] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:59:49,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:59:49,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2021-10-21 19:59:49,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693894641] [2021-10-21 19:59:49,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-21 19:59:49,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:49,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-21 19:59:49,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-10-21 19:59:49,808 INFO L87 Difference]: Start difference. First operand 284 states and 329 transitions. Second operand has 48 states, 48 states have (on average 5.645833333333333) internal successors, (271), 47 states have internal predecessors, (271), 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) [2021-10-21 19:59:50,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:50,995 INFO L93 Difference]: Finished difference Result 294 states and 340 transitions. [2021-10-21 19:59:50,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-10-21 19:59:50,995 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 5.645833333333333) internal successors, (271), 47 states have internal predecessors, (271), 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 271 [2021-10-21 19:59:50,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:50,997 INFO L225 Difference]: With dead ends: 294 [2021-10-21 19:59:50,997 INFO L226 Difference]: Without dead ends: 290 [2021-10-21 19:59:50,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1782.4ms TimeCoverageRelationStatistics Valid=3151, Invalid=5221, Unknown=0, NotChecked=0, Total=8372 [2021-10-21 19:59:50,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-10-21 19:59:51,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2021-10-21 19:59:51,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.1626297577854672) internal successors, (336), 289 states have internal predecessors, (336), 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) [2021-10-21 19:59:51,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 336 transitions. [2021-10-21 19:59:51,026 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 336 transitions. Word has length 271 [2021-10-21 19:59:51,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:51,026 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 336 transitions. [2021-10-21 19:59:51,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 5.645833333333333) internal successors, (271), 47 states have internal predecessors, (271), 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) [2021-10-21 19:59:51,027 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 336 transitions. [2021-10-21 19:59:51,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-10-21 19:59:51,029 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:51,029 INFO L512 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:51,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-10-21 19:59:51,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-10-21 19:59:51,244 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:51,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:51,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1810718452, now seen corresponding path program 45 times [2021-10-21 19:59:51,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:51,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839469710] [2021-10-21 19:59:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:51,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:51,267 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:59:51,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297744390] [2021-10-21 19:59:51,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:59:51,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:59:51,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:59:51,285 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:59:51,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-10-21 20:00:08,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-10-21 20:00:08,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:00:08,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 93 conjunts are in the unsatisfiable core [2021-10-21 20:00:08,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:00:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6030 backedges. 0 proven. 6030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:00:09,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:09,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839469710] [2021-10-21 20:00:09,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:00:09,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297744390] [2021-10-21 20:00:09,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297744390] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:00:09,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:00:09,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2021-10-21 20:00:09,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582957534] [2021-10-21 20:00:09,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-21 20:00:09,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:09,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-21 20:00:09,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-10-21 20:00:09,990 INFO L87 Difference]: Start difference. First operand 290 states and 336 transitions. Second operand has 49 states, 49 states have (on average 5.653061224489796) internal successors, (277), 48 states have internal predecessors, (277), 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) [2021-10-21 20:00:11,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:11,165 INFO L93 Difference]: Finished difference Result 300 states and 347 transitions. [2021-10-21 20:00:11,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-10-21 20:00:11,166 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 5.653061224489796) internal successors, (277), 48 states have internal predecessors, (277), 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 277 [2021-10-21 20:00:11,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:11,167 INFO L225 Difference]: With dead ends: 300 [2021-10-21 20:00:11,167 INFO L226 Difference]: Without dead ends: 296 [2021-10-21 20:00:11,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1816.2ms TimeCoverageRelationStatistics Valid=3290, Invalid=5452, Unknown=0, NotChecked=0, Total=8742 [2021-10-21 20:00:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-10-21 20:00:11,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2021-10-21 20:00:11,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.1627118644067798) internal successors, (343), 295 states have internal predecessors, (343), 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) [2021-10-21 20:00:11,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 343 transitions. [2021-10-21 20:00:11,187 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 343 transitions. Word has length 277 [2021-10-21 20:00:11,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:11,187 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 343 transitions. [2021-10-21 20:00:11,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 5.653061224489796) internal successors, (277), 48 states have internal predecessors, (277), 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) [2021-10-21 20:00:11,188 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 343 transitions. [2021-10-21 20:00:11,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-10-21 20:00:11,189 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:11,190 INFO L512 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:11,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-10-21 20:00:11,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:00:11,414 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:11,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:11,415 INFO L82 PathProgramCache]: Analyzing trace with hash -962902690, now seen corresponding path program 46 times [2021-10-21 20:00:11,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:11,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032077880] [2021-10-21 20:00:11,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:11,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:11,455 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:00:11,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778038257] [2021-10-21 20:00:11,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:00:11,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:00:11,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:00:11,457 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:00:11,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-10-21 20:00:14,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:00:14,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:00:14,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 95 conjunts are in the unsatisfiable core [2021-10-21 20:00:14,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:00:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 0 proven. 6302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:00:15,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:15,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032077880] [2021-10-21 20:00:15,898 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:00:15,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778038257] [2021-10-21 20:00:15,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778038257] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:00:15,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:00:15,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2021-10-21 20:00:15,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598847458] [2021-10-21 20:00:15,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-10-21 20:00:15,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:15,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-10-21 20:00:15,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-10-21 20:00:15,901 INFO L87 Difference]: Start difference. First operand 296 states and 343 transitions. Second operand has 50 states, 50 states have (on average 5.66) internal successors, (283), 49 states have internal predecessors, (283), 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) [2021-10-21 20:00:17,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:17,170 INFO L93 Difference]: Finished difference Result 306 states and 354 transitions. [2021-10-21 20:00:17,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-10-21 20:00:17,171 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.66) internal successors, (283), 49 states have internal predecessors, (283), 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 283 [2021-10-21 20:00:17,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:17,172 INFO L225 Difference]: With dead ends: 306 [2021-10-21 20:00:17,172 INFO L226 Difference]: Without dead ends: 302 [2021-10-21 20:00:17,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1908.3ms TimeCoverageRelationStatistics Valid=3432, Invalid=5688, Unknown=0, NotChecked=0, Total=9120 [2021-10-21 20:00:17,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-10-21 20:00:17,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2021-10-21 20:00:17,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 1.1627906976744187) internal successors, (350), 301 states have internal predecessors, (350), 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) [2021-10-21 20:00:17,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 350 transitions. [2021-10-21 20:00:17,202 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 350 transitions. Word has length 283 [2021-10-21 20:00:17,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:17,202 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 350 transitions. [2021-10-21 20:00:17,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.66) internal successors, (283), 49 states have internal predecessors, (283), 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) [2021-10-21 20:00:17,204 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 350 transitions. [2021-10-21 20:00:17,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-10-21 20:00:17,206 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:17,206 INFO L512 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:17,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-10-21 20:00:17,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-10-21 20:00:17,425 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:17,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:17,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1658315824, now seen corresponding path program 47 times [2021-10-21 20:00:17,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:17,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977386740] [2021-10-21 20:00:17,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:17,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:17,509 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:00:17,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054683088] [2021-10-21 20:00:17,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:00:17,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:00:17,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:00:17,512 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:00:17,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-10-21 20:01:21,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-10-21 20:01:21,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:01:21,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 97 conjunts are in the unsatisfiable core [2021-10-21 20:01:21,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:01:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 0 proven. 6580 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:01:22,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:01:22,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977386740] [2021-10-21 20:01:22,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:01:22,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054683088] [2021-10-21 20:01:22,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054683088] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:01:22,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:01:22,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2021-10-21 20:01:22,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181259584] [2021-10-21 20:01:22,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-21 20:01:22,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:01:22,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-21 20:01:22,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-10-21 20:01:22,991 INFO L87 Difference]: Start difference. First operand 302 states and 350 transitions. Second operand has 51 states, 51 states have (on average 5.666666666666667) internal successors, (289), 50 states have internal predecessors, (289), 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) [2021-10-21 20:01:24,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:01:24,264 INFO L93 Difference]: Finished difference Result 312 states and 361 transitions. [2021-10-21 20:01:24,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-10-21 20:01:24,264 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 5.666666666666667) internal successors, (289), 50 states have internal predecessors, (289), 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 289 [2021-10-21 20:01:24,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:01:24,266 INFO L225 Difference]: With dead ends: 312 [2021-10-21 20:01:24,266 INFO L226 Difference]: Without dead ends: 308 [2021-10-21 20:01:24,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1852.2ms TimeCoverageRelationStatistics Valid=3577, Invalid=5929, Unknown=0, NotChecked=0, Total=9506 [2021-10-21 20:01:24,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-10-21 20:01:24,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2021-10-21 20:01:24,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.1628664495114007) internal successors, (357), 307 states have internal predecessors, (357), 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) [2021-10-21 20:01:24,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 357 transitions. [2021-10-21 20:01:24,284 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 357 transitions. Word has length 289 [2021-10-21 20:01:24,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:01:24,284 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 357 transitions. [2021-10-21 20:01:24,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.666666666666667) internal successors, (289), 50 states have internal predecessors, (289), 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) [2021-10-21 20:01:24,284 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 357 transitions. [2021-10-21 20:01:24,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-10-21 20:01:24,286 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:01:24,286 INFO L512 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2021-10-21 20:01:24,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-10-21 20:01:24,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:01:24,501 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:01:24,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:01:24,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1602395522, now seen corresponding path program 48 times [2021-10-21 20:01:24,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:01:24,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335870184] [2021-10-21 20:01:24,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:01:24,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:01:24,550 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:01:24,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892148882] [2021-10-21 20:01:24,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:01:24,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:01:24,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:01:24,553 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:01:24,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-10-21 20:03:23,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-10-21 20:03:23,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:23,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 99 conjunts are in the unsatisfiable core [2021-10-21 20:03:23,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6864 backedges. 0 proven. 6864 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:03:24,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:24,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335870184] [2021-10-21 20:03:24,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:03:24,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892148882] [2021-10-21 20:03:24,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892148882] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:24,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:03:24,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2021-10-21 20:03:24,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504633063] [2021-10-21 20:03:24,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-21 20:03:24,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:24,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-21 20:03:24,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-10-21 20:03:24,699 INFO L87 Difference]: Start difference. First operand 308 states and 357 transitions. Second operand has 52 states, 52 states have (on average 5.673076923076923) internal successors, (295), 51 states have internal predecessors, (295), 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) [2021-10-21 20:03:25,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:25,808 INFO L93 Difference]: Finished difference Result 318 states and 368 transitions. [2021-10-21 20:03:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-10-21 20:03:25,808 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 5.673076923076923) internal successors, (295), 51 states have internal predecessors, (295), 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 295 [2021-10-21 20:03:25,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:25,810 INFO L225 Difference]: With dead ends: 318 [2021-10-21 20:03:25,810 INFO L226 Difference]: Without dead ends: 314 [2021-10-21 20:03:25,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1750.2ms TimeCoverageRelationStatistics Valid=3725, Invalid=6175, Unknown=0, NotChecked=0, Total=9900 [2021-10-21 20:03:25,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-10-21 20:03:25,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2021-10-21 20:03:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 1.1629392971246006) internal successors, (364), 313 states have internal predecessors, (364), 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) [2021-10-21 20:03:25,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 364 transitions. [2021-10-21 20:03:25,836 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 364 transitions. Word has length 295 [2021-10-21 20:03:25,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:25,836 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 364 transitions. [2021-10-21 20:03:25,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.673076923076923) internal successors, (295), 51 states have internal predecessors, (295), 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) [2021-10-21 20:03:25,837 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 364 transitions. [2021-10-21 20:03:25,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-10-21 20:03:25,838 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:25,839 INFO L512 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:25,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:26,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:26,052 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:26,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:26,052 INFO L82 PathProgramCache]: Analyzing trace with hash 121475412, now seen corresponding path program 49 times [2021-10-21 20:03:26,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:26,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783136359] [2021-10-21 20:03:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:26,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:26,117 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:03:26,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785162812] [2021-10-21 20:03:26,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:03:26,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:26,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:26,133 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:26,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-10-21 20:03:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:28,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 1141 conjuncts, 101 conjunts are in the unsatisfiable core [2021-10-21 20:03:28,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:30,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7154 backedges. 0 proven. 7154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:03:30,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:30,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783136359] [2021-10-21 20:03:30,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:03:30,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785162812] [2021-10-21 20:03:30,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785162812] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:30,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:03:30,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2021-10-21 20:03:30,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471361809] [2021-10-21 20:03:30,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-10-21 20:03:30,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:30,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-10-21 20:03:30,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-10-21 20:03:30,409 INFO L87 Difference]: Start difference. First operand 314 states and 364 transitions. Second operand has 53 states, 53 states have (on average 5.679245283018868) internal successors, (301), 52 states have internal predecessors, (301), 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) [2021-10-21 20:03:31,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:31,669 INFO L93 Difference]: Finished difference Result 324 states and 375 transitions. [2021-10-21 20:03:31,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-10-21 20:03:31,669 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 5.679245283018868) internal successors, (301), 52 states have internal predecessors, (301), 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 301 [2021-10-21 20:03:31,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:31,670 INFO L225 Difference]: With dead ends: 324 [2021-10-21 20:03:31,670 INFO L226 Difference]: Without dead ends: 320 [2021-10-21 20:03:31,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1923.2ms TimeCoverageRelationStatistics Valid=3876, Invalid=6426, Unknown=0, NotChecked=0, Total=10302 [2021-10-21 20:03:31,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-10-21 20:03:31,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2021-10-21 20:03:31,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.1630094043887147) internal successors, (371), 319 states have internal predecessors, (371), 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) [2021-10-21 20:03:31,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 371 transitions. [2021-10-21 20:03:31,690 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 371 transitions. Word has length 301 [2021-10-21 20:03:31,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:31,691 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 371 transitions. [2021-10-21 20:03:31,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 5.679245283018868) internal successors, (301), 52 states have internal predecessors, (301), 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) [2021-10-21 20:03:31,691 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 371 transitions. [2021-10-21 20:03:31,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-10-21 20:03:31,693 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:31,693 INFO L512 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:31,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:31,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-10-21 20:03:31,913 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:31,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:31,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1788010406, now seen corresponding path program 50 times [2021-10-21 20:03:31,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:31,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547970847] [2021-10-21 20:03:31,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:31,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:31,936 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:03:31,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350865540] [2021-10-21 20:03:31,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:03:31,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:31,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:31,937 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:31,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-10-21 20:03:34,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:03:34,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-21 20:03:34,993 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:03:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:03:35,533 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:03:35,533 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 20:03:35,534 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:03:35,536 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:03:35,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:35,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-10-21 20:03:35,762 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:03:35,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:03:35 BoogieIcfgContainer [2021-10-21 20:03:35,937 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:03:35,937 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:03:35,937 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:03:35,937 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:03:35,938 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:55:00" (3/4) ... [2021-10-21 20:03:35,940 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 20:03:36,101 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:03:36,101 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:03:36,103 INFO L168 Benchmark]: Toolchain (without parser) took 516007.76 ms. Allocated memory was 86.0 MB in the beginning and 685.8 MB in the end (delta: 599.8 MB). Free memory was 47.8 MB in the beginning and 449.1 MB in the end (delta: -401.3 MB). Peak memory consumption was 199.3 MB. Max. memory is 16.1 GB. [2021-10-21 20:03:36,103 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 86.0 MB. Free memory is still 63.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:03:36,103 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.14 ms. Allocated memory was 86.0 MB in the beginning and 107.0 MB in the end (delta: 21.0 MB). Free memory was 47.6 MB in the beginning and 83.1 MB in the end (delta: -35.5 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. [2021-10-21 20:03:36,104 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.62 ms. Allocated memory is still 107.0 MB. Free memory was 83.1 MB in the beginning and 81.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:03:36,104 INFO L168 Benchmark]: Boogie Preprocessor took 27.19 ms. Allocated memory is still 107.0 MB. Free memory was 81.5 MB in the beginning and 80.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:03:36,104 INFO L168 Benchmark]: RCFGBuilder took 345.32 ms. Allocated memory is still 107.0 MB. Free memory was 80.3 MB in the beginning and 70.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:03:36,105 INFO L168 Benchmark]: TraceAbstraction took 515108.75 ms. Allocated memory was 107.0 MB in the beginning and 685.8 MB in the end (delta: 578.8 MB). Free memory was 70.3 MB in the beginning and 472.2 MB in the end (delta: -401.9 MB). Peak memory consumption was 178.0 MB. Max. memory is 16.1 GB. [2021-10-21 20:03:36,105 INFO L168 Benchmark]: Witness Printer took 164.34 ms. Allocated memory is still 685.8 MB. Free memory was 472.2 MB in the beginning and 449.1 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:03:36,107 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 86.0 MB. Free memory is still 63.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 312.14 ms. Allocated memory was 86.0 MB in the beginning and 107.0 MB in the end (delta: 21.0 MB). Free memory was 47.6 MB in the beginning and 83.1 MB in the end (delta: -35.5 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.62 ms. Allocated memory is still 107.0 MB. Free memory was 83.1 MB in the beginning and 81.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.19 ms. Allocated memory is still 107.0 MB. Free memory was 81.5 MB in the beginning and 80.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 345.32 ms. Allocated memory is still 107.0 MB. Free memory was 80.3 MB in the beginning and 70.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 515108.75 ms. Allocated memory was 107.0 MB in the beginning and 685.8 MB in the end (delta: 578.8 MB). Free memory was 70.3 MB in the beginning and 472.2 MB in the end (delta: -401.9 MB). Peak memory consumption was 178.0 MB. Max. memory is 16.1 GB. * Witness Printer took 164.34 ms. Allocated memory is still 685.8 MB. Free memory was 472.2 MB in the beginning and 449.1 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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++<50 [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++<50 [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++<50 [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++<50 [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++<50 [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++<50 [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++<50 [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++<50 [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++<50 [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++<50 [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 TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=11] [L35] COND FALSE !(!(x <= X)) VAL [counter=11] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=11] [L45] x++ VAL [counter=11] [L31] EXPR counter++ VAL [counter=12] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=12] [L35] COND FALSE !(!(x <= X)) VAL [counter=12] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=12] [L45] x++ VAL [counter=12] [L31] EXPR counter++ VAL [counter=13] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=13] [L35] COND FALSE !(!(x <= X)) VAL [counter=13] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=13] [L45] x++ VAL [counter=13] [L31] EXPR counter++ VAL [counter=14] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=14] [L35] COND FALSE !(!(x <= X)) VAL [counter=14] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=14] [L45] x++ VAL [counter=14] [L31] EXPR counter++ VAL [counter=15] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=15] [L35] COND FALSE !(!(x <= X)) VAL [counter=15] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=15] [L45] x++ VAL [counter=15] [L31] EXPR counter++ VAL [counter=16] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=16] [L35] COND FALSE !(!(x <= X)) VAL [counter=16] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=16] [L45] x++ VAL [counter=16] [L31] EXPR counter++ VAL [counter=17] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=17] [L35] COND FALSE !(!(x <= X)) VAL [counter=17] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=17] [L45] x++ VAL [counter=17] [L31] EXPR counter++ VAL [counter=18] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=18] [L35] COND FALSE !(!(x <= X)) VAL [counter=18] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=18] [L45] x++ VAL [counter=18] [L31] EXPR counter++ VAL [counter=19] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=19] [L35] COND FALSE !(!(x <= X)) VAL [counter=19] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=19] [L45] x++ VAL [counter=19] [L31] EXPR counter++ VAL [counter=20] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=20] [L35] COND FALSE !(!(x <= X)) VAL [counter=20] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=20] [L45] x++ VAL [counter=20] [L31] EXPR counter++ VAL [counter=21] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=21] [L35] COND FALSE !(!(x <= X)) VAL [counter=21] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=21] [L45] x++ VAL [counter=21] [L31] EXPR counter++ VAL [counter=22] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=22] [L35] COND FALSE !(!(x <= X)) VAL [counter=22] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=22] [L45] x++ VAL [counter=22] [L31] EXPR counter++ VAL [counter=23] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=23] [L35] COND FALSE !(!(x <= X)) VAL [counter=23] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=23] [L45] x++ VAL [counter=23] [L31] EXPR counter++ VAL [counter=24] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=24] [L35] COND FALSE !(!(x <= X)) VAL [counter=24] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=24] [L45] x++ VAL [counter=24] [L31] EXPR counter++ VAL [counter=25] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=25] [L35] COND FALSE !(!(x <= X)) VAL [counter=25] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=25] [L45] x++ VAL [counter=25] [L31] EXPR counter++ VAL [counter=26] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=26] [L35] COND FALSE !(!(x <= X)) VAL [counter=26] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=26] [L45] x++ VAL [counter=26] [L31] EXPR counter++ VAL [counter=27] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=27] [L35] COND FALSE !(!(x <= X)) VAL [counter=27] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=27] [L45] x++ VAL [counter=27] [L31] EXPR counter++ VAL [counter=28] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=28] [L35] COND FALSE !(!(x <= X)) VAL [counter=28] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=28] [L45] x++ VAL [counter=28] [L31] EXPR counter++ VAL [counter=29] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=29] [L35] COND FALSE !(!(x <= X)) VAL [counter=29] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=29] [L45] x++ VAL [counter=29] [L31] EXPR counter++ VAL [counter=30] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=30] [L35] COND FALSE !(!(x <= X)) VAL [counter=30] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=30] [L45] x++ VAL [counter=30] [L31] EXPR counter++ VAL [counter=31] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=31] [L35] COND FALSE !(!(x <= X)) VAL [counter=31] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=31] [L45] x++ VAL [counter=31] [L31] EXPR counter++ VAL [counter=32] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=32] [L35] COND FALSE !(!(x <= X)) VAL [counter=32] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=32] [L45] x++ VAL [counter=32] [L31] EXPR counter++ VAL [counter=33] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=33] [L35] COND FALSE !(!(x <= X)) VAL [counter=33] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=33] [L45] x++ VAL [counter=33] [L31] EXPR counter++ VAL [counter=34] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=34] [L35] COND FALSE !(!(x <= X)) VAL [counter=34] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=34] [L45] x++ VAL [counter=34] [L31] EXPR counter++ VAL [counter=35] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=35] [L35] COND FALSE !(!(x <= X)) VAL [counter=35] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=35] [L45] x++ VAL [counter=35] [L31] EXPR counter++ VAL [counter=36] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=36] [L35] COND FALSE !(!(x <= X)) VAL [counter=36] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=36] [L45] x++ VAL [counter=36] [L31] EXPR counter++ VAL [counter=37] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=37] [L35] COND FALSE !(!(x <= X)) VAL [counter=37] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=37] [L45] x++ VAL [counter=37] [L31] EXPR counter++ VAL [counter=38] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=38] [L35] COND FALSE !(!(x <= X)) VAL [counter=38] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=38] [L45] x++ VAL [counter=38] [L31] EXPR counter++ VAL [counter=39] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=39] [L35] COND FALSE !(!(x <= X)) VAL [counter=39] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=39] [L45] x++ VAL [counter=39] [L31] EXPR counter++ VAL [counter=40] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=40] [L35] COND FALSE !(!(x <= X)) VAL [counter=40] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=40] [L45] x++ VAL [counter=40] [L31] EXPR counter++ VAL [counter=41] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=41] [L35] COND FALSE !(!(x <= X)) VAL [counter=41] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=41] [L45] x++ VAL [counter=41] [L31] EXPR counter++ VAL [counter=42] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=42] [L35] COND FALSE !(!(x <= X)) VAL [counter=42] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=42] [L45] x++ VAL [counter=42] [L31] EXPR counter++ VAL [counter=43] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=43] [L35] COND FALSE !(!(x <= X)) VAL [counter=43] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=43] [L45] x++ VAL [counter=43] [L31] EXPR counter++ VAL [counter=44] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=44] [L35] COND FALSE !(!(x <= X)) VAL [counter=44] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=44] [L45] x++ VAL [counter=44] [L31] EXPR counter++ VAL [counter=45] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=45] [L35] COND FALSE !(!(x <= X)) VAL [counter=45] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=45] [L45] x++ VAL [counter=45] [L31] EXPR counter++ VAL [counter=46] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=46] [L35] COND FALSE !(!(x <= X)) VAL [counter=46] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=46] [L45] x++ VAL [counter=46] [L31] EXPR counter++ VAL [counter=47] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=47] [L35] COND FALSE !(!(x <= X)) VAL [counter=47] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=47] [L45] x++ VAL [counter=47] [L31] EXPR counter++ VAL [counter=48] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=48] [L35] COND FALSE !(!(x <= X)) VAL [counter=48] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=48] [L45] x++ VAL [counter=48] [L31] EXPR counter++ VAL [counter=49] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=49] [L35] COND FALSE !(!(x <= X)) VAL [counter=49] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=49] [L45] x++ VAL [counter=49] [L31] EXPR counter++ VAL [counter=50] [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=50] [L35] COND FALSE !(!(x <= X)) VAL [counter=50] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=50] [L45] x++ VAL [counter=50] [L31] EXPR counter++ VAL [counter=51] [L31] COND FALSE !(counter++<50) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x [L14] COND TRUE !(cond) VAL [counter=51] [L16] reach_error() VAL [counter=51] - 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: 514840.6ms, OverallIterations: 66, TraceHistogramMax: 51, EmptinessCheckTime: 82.8ms, AutomataDifference: 31044.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 764 SDtfs, 4136 SDslu, 8375 SDs, 0 SdLazy, 4203 SolverSat, 293 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5264.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9210 GetRequests, 6511 SyntacticMatches, 0 SemanticMatches, 2699 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21069 ImplicationChecksByTransitivity, 42095.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=320occurred in iteration=65, InterpolantAutomatonStates: 2793, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1026.3ms AutomataMinimizationTime, 65 MinimizatonAttempts, 159 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1186.2ms SsaConstructionTime, 359236.9ms SatisfiabilityAnalysisTime, 48179.7ms InterpolantComputationTime, 8294 NumberOfCodeBlocks, 8246 NumberOfCodeBlocksAsserted, 708 NumberOfCheckSat, 7922 ConstructedInterpolants, 0 QuantifiedInterpolants, 26206 SizeOfPredicates, 1377 NumberOfNonLiveVariables, 31508 ConjunctsInSsa, 2951 ConjunctsInUnsatCore, 65 InterpolantComputations, 4 PerfectInterpolantSequences, 112/120280 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! [2021-10-21 20:03:36,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a229d2-ee8e-4ff3-b7fd-f959110a5d39/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...