./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3 --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 a3e843bfc822d054ad9b10c58d6f83fcd4aca808 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:19:44,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:19:44,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:19:44,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:19:44,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:19:44,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:19:44,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:19:44,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:19:44,449 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:19:44,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:19:44,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:19:44,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:19:44,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:19:44,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:19:44,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:19:44,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:19:44,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:19:44,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:19:44,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:19:44,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:19:44,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:19:44,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:19:44,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:19:44,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:19:44,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:19:44,498 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:19:44,499 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:19:44,500 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:19:44,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:19:44,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:19:44,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:19:44,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:19:44,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:19:44,511 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:19:44,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:19:44,515 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:19:44,516 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:19:44,516 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:19:44,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:19:44,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:19:44,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:19:44,520 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:19:44,571 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:19:44,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:19:44,576 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:19:44,576 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:19:44,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:19:44,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:19:44,585 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:19:44,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:19:44,585 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:19:44,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:19:44,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:19:44,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:19:44,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:19:44,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:19:44,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:19:44,587 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:19:44,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:19:44,587 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:19:44,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:19:44,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:19:44,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:19:44,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:19:44,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:19:44,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:19:44,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:19:44,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:19:44,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:19:44,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:19:44,590 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:19:44,590 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:19:44,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:19:44,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:19:44,591 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_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3e843bfc822d054ad9b10c58d6f83fcd4aca808 [2021-10-15 20:19:44,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:19:44,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:19:44,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:19:44,925 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:19:44,926 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:19:44,927 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound1.c [2021-10-15 20:19:45,009 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/data/f95662875/fc0a310ac28a4bfcbc08caadea95dc20/FLAGfe5ae634b [2021-10-15 20:19:45,535 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:19:45,535 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound1.c [2021-10-15 20:19:45,543 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/data/f95662875/fc0a310ac28a4bfcbc08caadea95dc20/FLAGfe5ae634b [2021-10-15 20:19:45,846 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/data/f95662875/fc0a310ac28a4bfcbc08caadea95dc20 [2021-10-15 20:19:45,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:19:45,851 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:19:45,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:19:45,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:19:45,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:19:45,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:19:45" (1/1) ... [2021-10-15 20:19:45,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@795352d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:45, skipping insertion in model container [2021-10-15 20:19:45,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:19:45" (1/1) ... [2021-10-15 20:19:45,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:19:45,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:19:46,117 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_31b73b67-5106-4cc4-a004-6aa15a892d59/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound1.c[576,589] [2021-10-15 20:19:46,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:19:46,157 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:19:46,183 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_31b73b67-5106-4cc4-a004-6aa15a892d59/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound1.c[576,589] [2021-10-15 20:19:46,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:19:46,227 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:19:46,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:46 WrapperNode [2021-10-15 20:19:46,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:19:46,231 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:19:46,232 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:19:46,232 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:19:46,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:46" (1/1) ... [2021-10-15 20:19:46,250 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:46" (1/1) ... [2021-10-15 20:19:46,288 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:19:46,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:19:46,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:19:46,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:19:46,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:46" (1/1) ... [2021-10-15 20:19:46,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:46" (1/1) ... [2021-10-15 20:19:46,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:46" (1/1) ... [2021-10-15 20:19:46,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:46" (1/1) ... [2021-10-15 20:19:46,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:46" (1/1) ... [2021-10-15 20:19:46,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:46" (1/1) ... [2021-10-15 20:19:46,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:46" (1/1) ... [2021-10-15 20:19:46,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:19:46,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:19:46,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:19:46,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:19:46,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:46" (1/1) ... [2021-10-15 20:19:46,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:19:46,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:19:46,389 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:19:46,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:19:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:19:46,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:19:46,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:19:46,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:19:46,705 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:19:46,705 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-10-15 20:19:46,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:19:46 BoogieIcfgContainer [2021-10-15 20:19:46,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:19:46,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:19:46,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:19:46,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:19:46,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:19:45" (1/3) ... [2021-10-15 20:19:46,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e56a891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:19:46, skipping insertion in model container [2021-10-15 20:19:46,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:19:46" (2/3) ... [2021-10-15 20:19:46,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e56a891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:19:46, skipping insertion in model container [2021-10-15 20:19:46,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:19:46" (3/3) ... [2021-10-15 20:19:46,743 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound1.c [2021-10-15 20:19:46,748 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:19:46,749 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-15 20:19:46,813 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:19:46,821 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, mConcurrency=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 [2021-10-15 20:19:46,821 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-15 20:19:46,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 41 places, 54 transitions, 108 flow [2021-10-15 20:19:46,902 INFO L129 PetriNetUnfolder]: 14/54 cut-off events. [2021-10-15 20:19:46,903 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:19:46,905 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 54 events. 14/54 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 69 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 20:19:46,905 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 54 transitions, 108 flow [2021-10-15 20:19:46,926 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 49 transitions, 98 flow [2021-10-15 20:19:46,931 INFO L129 PetriNetUnfolder]: 3/14 cut-off events. [2021-10-15 20:19:46,931 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:19:46,931 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:46,932 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:19:46,933 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:19:46,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:46,952 INFO L82 PathProgramCache]: Analyzing trace with hash 122367883, now seen corresponding path program 1 times [2021-10-15 20:19:46,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:46,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716066677] [2021-10-15 20:19:46,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:46,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:19:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:19:47,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:47,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716066677] [2021-10-15 20:19:47,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716066677] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:19:47,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:19:47,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:19:47,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902609563] [2021-10-15 20:19:47,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 20:19:47,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:47,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 20:19:47,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:19:47,194 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 54 [2021-10-15 20:19:47,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 49 transitions, 98 flow. Second operand has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:47,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:47,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 54 [2021-10-15 20:19:47,200 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:47,215 INFO L129 PetriNetUnfolder]: 4/40 cut-off events. [2021-10-15 20:19:47,215 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:19:47,216 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 40 events. 4/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 9/39 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2021-10-15 20:19:47,218 INFO L132 encePairwiseOnDemand]: 45/54 looper letters, 0 selfloop transitions, 0 changer transitions 0/40 dead transitions. [2021-10-15 20:19:47,218 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 40 transitions, 80 flow [2021-10-15 20:19:47,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:19:47,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 20:19:47,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 97 transitions. [2021-10-15 20:19:47,232 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8981481481481481 [2021-10-15 20:19:47,233 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 97 transitions. [2021-10-15 20:19:47,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 97 transitions. [2021-10-15 20:19:47,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:47,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 97 transitions. [2021-10-15 20:19:47,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 48.5) internal successors, (97), 2 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) [2021-10-15 20:19:47,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:47,247 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:47,249 INFO L186 Difference]: Start difference. First operand has 37 places, 49 transitions, 98 flow. Second operand 2 states and 97 transitions. [2021-10-15 20:19:47,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 40 transitions, 80 flow [2021-10-15 20:19:47,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 40 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:19:47,255 INFO L242 Difference]: Finished difference. Result has 38 places, 40 transitions, 80 flow [2021-10-15 20:19:47,258 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=80, PETRI_PLACES=38, PETRI_TRANSITIONS=40} [2021-10-15 20:19:47,259 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2021-10-15 20:19:47,259 INFO L470 AbstractCegarLoop]: Abstraction has has 38 places, 40 transitions, 80 flow [2021-10-15 20:19:47,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:47,260 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:47,260 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:19:47,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:19:47,261 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:19:47,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:47,262 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-10-15 20:19:47,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:47,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404602926] [2021-10-15 20:19:47,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:47,264 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:47,285 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:19:47,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204342613] [2021-10-15 20:19:47,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:47,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:47,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:19:47,292 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:19:47,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:19:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:19:47,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 20:19:47,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:19:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:19:47,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:47,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404602926] [2021-10-15 20:19:47,658 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:19:47,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204342613] [2021-10-15 20:19:47,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204342613] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:19:47,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:19:47,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 20:19:47,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085989487] [2021-10-15 20:19:47,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:19:47,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:47,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:19:47,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:19:47,672 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2021-10-15 20:19:47,675 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 40 transitions, 80 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:47,676 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:47,676 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2021-10-15 20:19:47,676 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:47,900 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2021-10-15 20:19:47,905 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:19:47,906 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 98 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 90. Up to 27 conditions per place. [2021-10-15 20:19:47,910 INFO L132 encePairwiseOnDemand]: 47/54 looper letters, 31 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2021-10-15 20:19:47,910 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 172 flow [2021-10-15 20:19:47,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:19:47,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:19:47,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2021-10-15 20:19:47,917 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3950617283950617 [2021-10-15 20:19:47,917 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 128 transitions. [2021-10-15 20:19:47,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 128 transitions. [2021-10-15 20:19:47,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:47,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 128 transitions. [2021-10-15 20:19:47,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:47,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 54.0) internal successors, (378), 7 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:47,924 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 54.0) internal successors, (378), 7 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:47,925 INFO L186 Difference]: Start difference. First operand has 38 places, 40 transitions, 80 flow. Second operand 6 states and 128 transitions. [2021-10-15 20:19:47,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 172 flow [2021-10-15 20:19:47,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 49 transitions, 172 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:19:47,931 INFO L242 Difference]: Finished difference. Result has 45 places, 43 transitions, 112 flow [2021-10-15 20:19:47,932 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=112, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2021-10-15 20:19:47,932 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 8 predicate places. [2021-10-15 20:19:47,933 INFO L470 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 112 flow [2021-10-15 20:19:47,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:47,933 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:47,934 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:19:47,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:19:48,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-15 20:19:48,149 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:19:48,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:48,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1182906761, now seen corresponding path program 1 times [2021-10-15 20:19:48,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:48,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824410539] [2021-10-15 20:19:48,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:48,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:48,168 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:19:48,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896305360] [2021-10-15 20:19:48,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:48,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:48,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:19:48,180 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:19:48,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:19:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:19:48,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:19:48,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:19:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:19:48,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:48,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824410539] [2021-10-15 20:19:48,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:19:48,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896305360] [2021-10-15 20:19:48,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896305360] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:19:48,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:19:48,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:19:48,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980610048] [2021-10-15 20:19:48,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:19:48,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:48,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:19:48,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:19:48,339 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 54 [2021-10-15 20:19:48,340 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:48,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:48,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 54 [2021-10-15 20:19:48,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:48,383 INFO L129 PetriNetUnfolder]: 4/52 cut-off events. [2021-10-15 20:19:48,384 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-15 20:19:48,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 52 events. 4/52 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 112 event pairs, 0 based on Foata normal form. 1/45 useless extension candidates. Maximal degree in co-relation 73. Up to 6 conditions per place. [2021-10-15 20:19:48,386 INFO L132 encePairwiseOnDemand]: 50/54 looper letters, 5 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2021-10-15 20:19:48,386 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 130 flow [2021-10-15 20:19:48,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:19:48,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:19:48,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 161 transitions. [2021-10-15 20:19:48,395 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7453703703703703 [2021-10-15 20:19:48,395 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 161 transitions. [2021-10-15 20:19:48,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 161 transitions. [2021-10-15 20:19:48,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:48,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 161 transitions. [2021-10-15 20:19:48,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 40.25) internal successors, (161), 4 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) [2021-10-15 20:19:48,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 54.0) internal successors, (270), 5 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:48,405 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 54.0) internal successors, (270), 5 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:48,405 INFO L186 Difference]: Start difference. First operand has 45 places, 43 transitions, 112 flow. Second operand 4 states and 161 transitions. [2021-10-15 20:19:48,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 130 flow [2021-10-15 20:19:48,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 124 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 20:19:48,410 INFO L242 Difference]: Finished difference. Result has 47 places, 44 transitions, 122 flow [2021-10-15 20:19:48,410 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2021-10-15 20:19:48,410 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 10 predicate places. [2021-10-15 20:19:48,410 INFO L470 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 122 flow [2021-10-15 20:19:48,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:48,411 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:48,411 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:19:48,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:19:48,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:48,632 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:19:48,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:48,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1985334737, now seen corresponding path program 1 times [2021-10-15 20:19:48,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:48,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035693125] [2021-10-15 20:19:48,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:48,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:48,646 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:19:48,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519069324] [2021-10-15 20:19:48,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:48,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:48,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:19:48,648 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:19:48,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:19:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:19:48,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 20:19:48,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:19:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:19:48,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:48,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035693125] [2021-10-15 20:19:48,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:19:48,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519069324] [2021-10-15 20:19:48,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519069324] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:19:48,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:19:48,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 20:19:48,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648215307] [2021-10-15 20:19:48,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:19:48,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:48,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:19:48,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:19:48,927 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2021-10-15 20:19:48,928 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 122 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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) [2021-10-15 20:19:48,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:48,928 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2021-10-15 20:19:48,928 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:49,158 INFO L129 PetriNetUnfolder]: 8/75 cut-off events. [2021-10-15 20:19:49,159 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-10-15 20:19:49,165 INFO L84 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 75 events. 8/75 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 142 event pairs, 0 based on Foata normal form. 1/66 useless extension candidates. Maximal degree in co-relation 146. Up to 28 conditions per place. [2021-10-15 20:19:49,167 INFO L132 encePairwiseOnDemand]: 41/54 looper letters, 38 selfloop transitions, 11 changer transitions 2/65 dead transitions. [2021-10-15 20:19:49,168 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 65 transitions, 268 flow [2021-10-15 20:19:49,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:19:49,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 20:19:49,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2021-10-15 20:19:49,169 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2021-10-15 20:19:49,169 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 166 transitions. [2021-10-15 20:19:49,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 166 transitions. [2021-10-15 20:19:49,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:49,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 166 transitions. [2021-10-15 20:19:49,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:49,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 54.0) internal successors, (432), 8 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:49,172 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 54.0) internal successors, (432), 8 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:49,172 INFO L186 Difference]: Start difference. First operand has 47 places, 44 transitions, 122 flow. Second operand 7 states and 166 transitions. [2021-10-15 20:19:49,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 65 transitions, 268 flow [2021-10-15 20:19:49,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 65 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:19:49,175 INFO L242 Difference]: Finished difference. Result has 55 places, 51 transitions, 190 flow [2021-10-15 20:19:49,175 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=190, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2021-10-15 20:19:49,175 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2021-10-15 20:19:49,175 INFO L470 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 190 flow [2021-10-15 20:19:49,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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) [2021-10-15 20:19:49,176 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:49,176 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:19:49,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:19:49,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:49,380 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:19:49,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:49,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1896102171, now seen corresponding path program 1 times [2021-10-15 20:19:49,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:49,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314944393] [2021-10-15 20:19:49,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:49,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:49,409 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:19:49,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827323500] [2021-10-15 20:19:49,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:49,409 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:49,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:19:49,410 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:19:49,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:19:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:19:49,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 20:19:49,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:19:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:19:49,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:49,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314944393] [2021-10-15 20:19:49,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:19:49,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827323500] [2021-10-15 20:19:49,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827323500] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:19:49,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:19:49,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:19:49,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205687896] [2021-10-15 20:19:49,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:19:49,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:49,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:19:49,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:19:49,579 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 54 [2021-10-15 20:19:49,581 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:49,581 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:49,581 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 54 [2021-10-15 20:19:49,581 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:49,608 INFO L129 PetriNetUnfolder]: 3/37 cut-off events. [2021-10-15 20:19:49,608 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-10-15 20:19:49,609 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 37 events. 3/37 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 2/39 useless extension candidates. Maximal degree in co-relation 82. Up to 6 conditions per place. [2021-10-15 20:19:49,609 INFO L132 encePairwiseOnDemand]: 49/54 looper letters, 2 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2021-10-15 20:19:49,609 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 29 transitions, 135 flow [2021-10-15 20:19:49,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:19:49,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:19:49,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 197 transitions. [2021-10-15 20:19:49,611 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7296296296296296 [2021-10-15 20:19:49,611 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 197 transitions. [2021-10-15 20:19:49,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 197 transitions. [2021-10-15 20:19:49,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:49,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 197 transitions. [2021-10-15 20:19:49,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 39.4) internal successors, (197), 5 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:49,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:49,615 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:49,615 INFO L186 Difference]: Start difference. First operand has 55 places, 51 transitions, 190 flow. Second operand 5 states and 197 transitions. [2021-10-15 20:19:49,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 29 transitions, 135 flow [2021-10-15 20:19:49,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 29 transitions, 126 flow, removed 1 selfloop flow, removed 4 redundant places. [2021-10-15 20:19:49,619 INFO L242 Difference]: Finished difference. Result has 39 places, 29 transitions, 122 flow [2021-10-15 20:19:49,619 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=39, PETRI_TRANSITIONS=29} [2021-10-15 20:19:49,620 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 2 predicate places. [2021-10-15 20:19:49,620 INFO L470 AbstractCegarLoop]: Abstraction has has 39 places, 29 transitions, 122 flow [2021-10-15 20:19:49,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:49,620 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:49,621 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:19:49,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:19:49,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:49,837 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:19:49,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:49,837 INFO L82 PathProgramCache]: Analyzing trace with hash -643457925, now seen corresponding path program 1 times [2021-10-15 20:19:49,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:49,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102341124] [2021-10-15 20:19:49,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:49,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:49,850 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:19:49,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740539419] [2021-10-15 20:19:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:49,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:49,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:19:49,854 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:19:49,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 20:19:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:19:49,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 20:19:49,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:19:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:19:49,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:49,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102341124] [2021-10-15 20:19:49,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:19:49,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740539419] [2021-10-15 20:19:49,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740539419] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:19:49,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:19:49,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:19:49,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322099033] [2021-10-15 20:19:49,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:19:49,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:49,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:19:49,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:19:49,986 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 54 [2021-10-15 20:19:49,987 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 29 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 37.6) internal successors, (188), 5 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:49,987 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:49,987 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 54 [2021-10-15 20:19:49,988 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:50,022 INFO L129 PetriNetUnfolder]: 0/20 cut-off events. [2021-10-15 20:19:50,023 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-10-15 20:19:50,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 20 events. 0/20 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs, 0 based on Foata normal form. 1/21 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-10-15 20:19:50,024 INFO L132 encePairwiseOnDemand]: 49/54 looper letters, 4 selfloop transitions, 4 changer transitions 2/20 dead transitions. [2021-10-15 20:19:50,024 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 20 transitions, 103 flow [2021-10-15 20:19:50,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:19:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:19:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 189 transitions. [2021-10-15 20:19:50,026 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7 [2021-10-15 20:19:50,026 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 189 transitions. [2021-10-15 20:19:50,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 189 transitions. [2021-10-15 20:19:50,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:50,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 189 transitions. [2021-10-15 20:19:50,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 37.8) internal successors, (189), 5 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) [2021-10-15 20:19:50,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:50,034 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:50,034 INFO L186 Difference]: Start difference. First operand has 39 places, 29 transitions, 122 flow. Second operand 5 states and 189 transitions. [2021-10-15 20:19:50,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 20 transitions, 103 flow [2021-10-15 20:19:50,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 20 transitions, 78 flow, removed 0 selfloop flow, removed 10 redundant places. [2021-10-15 20:19:50,039 INFO L242 Difference]: Finished difference. Result has 29 places, 18 transitions, 64 flow [2021-10-15 20:19:50,039 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=64, PETRI_PLACES=29, PETRI_TRANSITIONS=18} [2021-10-15 20:19:50,040 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, -8 predicate places. [2021-10-15 20:19:50,040 INFO L470 AbstractCegarLoop]: Abstraction has has 29 places, 18 transitions, 64 flow [2021-10-15 20:19:50,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.6) internal successors, (188), 5 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:50,041 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:50,041 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:19:50,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 20:19:50,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-15 20:19:50,266 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:19:50,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:50,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1527669658, now seen corresponding path program 1 times [2021-10-15 20:19:50,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:50,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494188048] [2021-10-15 20:19:50,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:50,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:50,278 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:19:50,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870468212] [2021-10-15 20:19:50,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:50,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:50,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:19:50,280 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:19:50,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 20:19:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:19:50,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 20:19:50,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:19:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:19:50,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:50,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494188048] [2021-10-15 20:19:50,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:19:50,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870468212] [2021-10-15 20:19:50,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870468212] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:19:50,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:19:50,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 20:19:50,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922541442] [2021-10-15 20:19:50,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:19:50,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:50,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:19:50,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:19:50,604 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2021-10-15 20:19:50,604 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 18 transitions, 64 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:50,604 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:50,604 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2021-10-15 20:19:50,605 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:50,652 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-10-15 20:19:50,652 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-15 20:19:50,653 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 16 events. 0/16 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/17 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 20:19:50,653 INFO L132 encePairwiseOnDemand]: 49/54 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2021-10-15 20:19:50,653 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 16 transitions, 76 flow [2021-10-15 20:19:50,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:19:50,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:19:50,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2021-10-15 20:19:50,655 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3271604938271605 [2021-10-15 20:19:50,655 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 106 transitions. [2021-10-15 20:19:50,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 106 transitions. [2021-10-15 20:19:50,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:50,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 106 transitions. [2021-10-15 20:19:50,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:50,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 54.0) internal successors, (378), 7 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:50,658 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 54.0) internal successors, (378), 7 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:50,658 INFO L186 Difference]: Start difference. First operand has 29 places, 18 transitions, 64 flow. Second operand 6 states and 106 transitions. [2021-10-15 20:19:50,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 16 transitions, 76 flow [2021-10-15 20:19:50,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 16 transitions, 55 flow, removed 2 selfloop flow, removed 8 redundant places. [2021-10-15 20:19:50,659 INFO L242 Difference]: Finished difference. Result has 24 places, 0 transitions, 0 flow [2021-10-15 20:19:50,660 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=24, PETRI_TRANSITIONS=0} [2021-10-15 20:19:50,660 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, -13 predicate places. [2021-10-15 20:19:50,660 INFO L470 AbstractCegarLoop]: Abstraction has has 24 places, 0 transitions, 0 flow [2021-10-15 20:19:50,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:50,663 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:19:50,664 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:19:50,664 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:19:50,664 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:19:50,664 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:19:50,665 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:19:50,665 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:19:50,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 20:19:50,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:19:50,889 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:19:50,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:19:50 BoogieIcfgContainer [2021-10-15 20:19:50,894 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:19:50,894 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:19:50,894 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:19:50,895 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:19:50,895 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:19:46" (3/4) ... [2021-10-15 20:19:50,901 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:19:50,911 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-10-15 20:19:50,911 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 20:19:50,911 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:19:50,912 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:19:50,955 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:19:50,955 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:19:50,957 INFO L168 Benchmark]: Toolchain (without parser) took 5105.39 ms. Allocated memory was 113.2 MB in the beginning and 138.4 MB in the end (delta: 25.2 MB). Free memory was 70.4 MB in the beginning and 86.8 MB in the end (delta: -16.5 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. [2021-10-15 20:19:50,957 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 113.2 MB. Free memory is still 86.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:19:50,958 INFO L168 Benchmark]: CACSL2BoogieTranslator took 372.43 ms. Allocated memory is still 113.2 MB. Free memory was 70.2 MB in the beginning and 86.6 MB in the end (delta: -16.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:19:50,958 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.01 ms. Allocated memory is still 113.2 MB. Free memory was 86.6 MB in the beginning and 84.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:19:50,959 INFO L168 Benchmark]: Boogie Preprocessor took 56.18 ms. Allocated memory is still 113.2 MB. Free memory was 84.9 MB in the beginning and 83.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:19:50,959 INFO L168 Benchmark]: RCFGBuilder took 362.03 ms. Allocated memory is still 113.2 MB. Free memory was 83.8 MB in the beginning and 72.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:19:50,960 INFO L168 Benchmark]: TraceAbstraction took 4184.12 ms. Allocated memory was 113.2 MB in the beginning and 138.4 MB in the end (delta: 25.2 MB). Free memory was 72.4 MB in the beginning and 90.0 MB in the end (delta: -17.6 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. [2021-10-15 20:19:50,960 INFO L168 Benchmark]: Witness Printer took 60.92 ms. Allocated memory is still 138.4 MB. Free memory was 90.0 MB in the beginning and 86.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:19:50,963 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 113.2 MB. Free memory is still 86.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 372.43 ms. Allocated memory is still 113.2 MB. Free memory was 70.2 MB in the beginning and 86.6 MB in the end (delta: -16.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 57.01 ms. Allocated memory is still 113.2 MB. Free memory was 86.6 MB in the beginning and 84.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.18 ms. Allocated memory is still 113.2 MB. Free memory was 84.9 MB in the beginning and 83.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 362.03 ms. Allocated memory is still 113.2 MB. Free memory was 83.8 MB in the beginning and 72.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4184.12 ms. Allocated memory was 113.2 MB in the beginning and 138.4 MB in the end (delta: 25.2 MB). Free memory was 72.4 MB in the beginning and 90.0 MB in the end (delta: -17.6 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. * Witness Printer took 60.92 ms. Allocated memory is still 138.4 MB. Free memory was 90.0 MB in the beginning and 86.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 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 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 4.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4081.7ms, OverallIterations: 7, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 827.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 104.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 46 SDtfs, 166 SDslu, 48 SDs, 0 SdLazy, 156 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 197.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 332.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=190occurred in iteration=4, InterpolantAutomatonStates: 35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 59.4ms SsaConstructionTime, 159.0ms SatisfiabilityAnalysisTime, 904.9ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 77 ConstructedInterpolants, 0 QuantifiedInterpolants, 307 SizeOfPredicates, 21 NumberOfNonLiveVariables, 479 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 7 InterpolantComputations, 6 PerfectInterpolantSequences, 3/5 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 - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 20:19:51,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31b73b67-5106-4cc4-a004-6aa15a892d59/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...