./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound2.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_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/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_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/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_a1ebe030-f91e-4776-a181-875714b76a3f/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 231a10bb05ed6dc00d2658e900a2b37af0aae558 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 20:07:34,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:07:34,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:07:34,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:07:34,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:07:34,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:07:34,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:07:34,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:07:34,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:07:34,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:07:34,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:07:34,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:07:34,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:07:34,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:07:34,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:07:34,972 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:07:34,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:07:34,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:07:34,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:07:34,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:07:34,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:07:34,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:07:34,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:07:34,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:07:34,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:07:34,990 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:07:34,990 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:07:34,991 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:07:34,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:07:34,993 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:07:34,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:07:34,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:07:34,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:07:34,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:07:34,998 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:07:34,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:07:34,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:07:35,000 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:07:35,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:07:35,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:07:35,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:07:35,003 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:07:35,031 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:07:35,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:07:35,032 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:07:35,032 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:07:35,033 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:07:35,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:07:35,034 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:07:35,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:07:35,034 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:07:35,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:07:35,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:07:35,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:07:35,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:07:35,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:07:35,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:07:35,036 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:07:35,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:07:35,036 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:07:35,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:07:35,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:07:35,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:07:35,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:07:35,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:07:35,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:07:35,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:07:35,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:07:35,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:07:35,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:07:35,048 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:07:35,050 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:07:35,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:07:35,050 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:07:35,051 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_a1ebe030-f91e-4776-a181-875714b76a3f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 231a10bb05ed6dc00d2658e900a2b37af0aae558 [2021-10-15 20:07:35,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:07:35,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:07:35,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:07:35,391 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:07:35,392 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:07:35,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound2.c [2021-10-15 20:07:35,472 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/data/c36efdb00/2c02992fb18c42f5975bedff21f14273/FLAG66804e688 [2021-10-15 20:07:36,093 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:07:36,094 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound2.c [2021-10-15 20:07:36,100 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/data/c36efdb00/2c02992fb18c42f5975bedff21f14273/FLAG66804e688 [2021-10-15 20:07:36,121 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/data/c36efdb00/2c02992fb18c42f5975bedff21f14273 [2021-10-15 20:07:36,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:07:36,126 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:07:36,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:07:36,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:07:36,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:07:36,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:07:36" (1/1) ... [2021-10-15 20:07:36,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b021d74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:36, skipping insertion in model container [2021-10-15 20:07:36,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:07:36" (1/1) ... [2021-10-15 20:07:36,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:07:36,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:07:36,414 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_a1ebe030-f91e-4776-a181-875714b76a3f/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound2.c[576,589] [2021-10-15 20:07:36,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:07:36,455 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:07:36,474 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_a1ebe030-f91e-4776-a181-875714b76a3f/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound2.c[576,589] [2021-10-15 20:07:36,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:07:36,518 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:07:36,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:36 WrapperNode [2021-10-15 20:07:36,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:07:36,521 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:07:36,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:07:36,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:07:36,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:36" (1/1) ... [2021-10-15 20:07:36,542 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:36" (1/1) ... [2021-10-15 20:07:36,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:07:36,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:07:36,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:07:36,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:07:36,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:36" (1/1) ... [2021-10-15 20:07:36,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:36" (1/1) ... [2021-10-15 20:07:36,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:36" (1/1) ... [2021-10-15 20:07:36,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:36" (1/1) ... [2021-10-15 20:07:36,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:36" (1/1) ... [2021-10-15 20:07:36,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:36" (1/1) ... [2021-10-15 20:07:36,617 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:36" (1/1) ... [2021-10-15 20:07:36,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:07:36,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:07:36,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:07:36,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:07:36,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:36" (1/1) ... [2021-10-15 20:07:36,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:07:36,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:07:36,679 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:07:36,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:07:36,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:07:36,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:07:36,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:07:36,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:07:36,985 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:07:36,985 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-10-15 20:07:36,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:07:36 BoogieIcfgContainer [2021-10-15 20:07:36,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:07:36,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:07:36,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:07:37,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:07:37,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:07:36" (1/3) ... [2021-10-15 20:07:37,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a23b65c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:07:37, skipping insertion in model container [2021-10-15 20:07:37,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:07:36" (2/3) ... [2021-10-15 20:07:37,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a23b65c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:07:37, skipping insertion in model container [2021-10-15 20:07:37,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:07:36" (3/3) ... [2021-10-15 20:07:37,013 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound2.c [2021-10-15 20:07:37,034 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:07:37,035 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-15 20:07:37,133 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:07:37,152 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 20:07:37,152 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-15 20:07:37,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 43 places, 58 transitions, 116 flow [2021-10-15 20:07:37,199 INFO L129 PetriNetUnfolder]: 16/58 cut-off events. [2021-10-15 20:07:37,199 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:07:37,201 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 58 events. 16/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 20:07:37,202 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 58 transitions, 116 flow [2021-10-15 20:07:37,208 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 53 transitions, 106 flow [2021-10-15 20:07:37,213 INFO L129 PetriNetUnfolder]: 5/20 cut-off events. [2021-10-15 20:07:37,214 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:07:37,214 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:37,215 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:37,216 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:07:37,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:37,222 INFO L82 PathProgramCache]: Analyzing trace with hash 330581779, now seen corresponding path program 1 times [2021-10-15 20:07:37,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:37,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859705468] [2021-10-15 20:07:37,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:37,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:37,389 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 20:07:37,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:37,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859705468] [2021-10-15 20:07:37,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859705468] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:37,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:37,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:07:37,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396623726] [2021-10-15 20:07:37,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 20:07:37,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:37,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 20:07:37,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:07:37,422 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 58 [2021-10-15 20:07:37,426 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 53 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 45.5) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:37,426 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:37,426 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 58 [2021-10-15 20:07:37,428 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:37,442 INFO L129 PetriNetUnfolder]: 2/40 cut-off events. [2021-10-15 20:07:37,442 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:07:37,444 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 40 events. 2/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 35 event pairs, 0 based on Foata normal form. 11/43 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2021-10-15 20:07:37,445 INFO L132 encePairwiseOnDemand]: 45/58 looper letters, 0 selfloop transitions, 0 changer transitions 0/40 dead transitions. [2021-10-15 20:07:37,445 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 40 transitions, 80 flow [2021-10-15 20:07:37,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:07:37,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 20:07:37,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 101 transitions. [2021-10-15 20:07:37,460 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8706896551724138 [2021-10-15 20:07:37,460 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 101 transitions. [2021-10-15 20:07:37,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 101 transitions. [2021-10-15 20:07:37,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:37,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 101 transitions. [2021-10-15 20:07:37,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 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 20:07:37,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 20:07:37,474 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 20:07:37,477 INFO L186 Difference]: Start difference. First operand has 39 places, 53 transitions, 106 flow. Second operand 2 states and 101 transitions. [2021-10-15 20:07:37,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 40 transitions, 80 flow [2021-10-15 20:07:37,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:07:37,483 INFO L242 Difference]: Finished difference. Result has 40 places, 40 transitions, 80 flow [2021-10-15 20:07:37,486 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=39, 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=40, PETRI_TRANSITIONS=40} [2021-10-15 20:07:37,487 INFO L334 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2021-10-15 20:07:37,487 INFO L470 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 80 flow [2021-10-15 20:07:37,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 45.5) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:37,488 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:37,488 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:37,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:07:37,489 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 20:07:37,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:37,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1507472743, now seen corresponding path program 1 times [2021-10-15 20:07:37,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:37,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371830652] [2021-10-15 20:07:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:37,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:37,518 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:07:37,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052797493] [2021-10-15 20:07:37,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:37,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:37,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:07:37,521 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:07:37,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:07:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:37,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 20:07:37,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:07:38,111 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 20:07:38,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:38,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371830652] [2021-10-15 20:07:38,113 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:07:38,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052797493] [2021-10-15 20:07:38,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052797493] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:38,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:38,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-15 20:07:38,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525692013] [2021-10-15 20:07:38,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 20:07:38,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:38,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 20:07:38,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:07:38,120 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 58 [2021-10-15 20:07:38,121 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 80 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 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 20:07:38,121 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:38,121 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 58 [2021-10-15 20:07:38,121 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:38,346 INFO L129 PetriNetUnfolder]: 2/51 cut-off events. [2021-10-15 20:07:38,350 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:07:38,351 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 51 events. 2/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 92. Up to 27 conditions per place. [2021-10-15 20:07:38,354 INFO L132 encePairwiseOnDemand]: 49/58 looper letters, 33 selfloop transitions, 8 changer transitions 0/49 dead transitions. [2021-10-15 20:07:38,354 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 49 transitions, 180 flow [2021-10-15 20:07:38,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:07:38,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 20:07:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2021-10-15 20:07:38,365 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2801724137931034 [2021-10-15 20:07:38,365 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 130 transitions. [2021-10-15 20:07:38,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 130 transitions. [2021-10-15 20:07:38,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:38,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 130 transitions. [2021-10-15 20:07:38,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 20:07:38,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 58.0) internal successors, (522), 9 states have internal predecessors, (522), 0 states have call successors, (0), 0 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 20:07:38,378 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 58.0) internal successors, (522), 9 states have internal predecessors, (522), 0 states have call successors, (0), 0 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 20:07:38,378 INFO L186 Difference]: Start difference. First operand has 40 places, 40 transitions, 80 flow. Second operand 8 states and 130 transitions. [2021-10-15 20:07:38,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 49 transitions, 180 flow [2021-10-15 20:07:38,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 180 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:07:38,381 INFO L242 Difference]: Finished difference. Result has 49 places, 43 transitions, 116 flow [2021-10-15 20:07:38,381 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=116, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2021-10-15 20:07:38,382 INFO L334 CegarLoopForPetriNet]: 39 programPoint places, 10 predicate places. [2021-10-15 20:07:38,382 INFO L470 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 116 flow [2021-10-15 20:07:38,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 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 20:07:38,382 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:38,382 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:38,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:07:38,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:38,611 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:07:38,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:38,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1277171076, now seen corresponding path program 1 times [2021-10-15 20:07:38,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:38,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113063321] [2021-10-15 20:07:38,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:38,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:38,631 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:07:38,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406789971] [2021-10-15 20:07:38,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:38,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:38,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:07:38,633 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:07:38,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:07:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:38,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 20:07:38,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:07:39,020 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 20:07:39,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:39,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113063321] [2021-10-15 20:07:39,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:07:39,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406789971] [2021-10-15 20:07:39,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406789971] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:39,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:39,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-15 20:07:39,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254964084] [2021-10-15 20:07:39,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 20:07:39,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:39,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 20:07:39,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:07:39,035 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 58 [2021-10-15 20:07:39,036 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 116 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 20:07:39,036 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:39,036 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 58 [2021-10-15 20:07:39,037 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:39,318 INFO L129 PetriNetUnfolder]: 3/65 cut-off events. [2021-10-15 20:07:39,319 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-15 20:07:39,321 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 65 events. 3/65 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 1/56 useless extension candidates. Maximal degree in co-relation 132. Up to 26 conditions per place. [2021-10-15 20:07:39,323 INFO L132 encePairwiseOnDemand]: 45/58 looper letters, 40 selfloop transitions, 10 changer transitions 2/61 dead transitions. [2021-10-15 20:07:39,323 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 61 transitions, 256 flow [2021-10-15 20:07:39,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:07:39,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 20:07:39,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2021-10-15 20:07:39,329 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3254310344827586 [2021-10-15 20:07:39,329 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 151 transitions. [2021-10-15 20:07:39,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 151 transitions. [2021-10-15 20:07:39,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:39,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 151 transitions. [2021-10-15 20:07:39,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:39,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 58.0) internal successors, (522), 9 states have internal predecessors, (522), 0 states have call successors, (0), 0 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 20:07:39,339 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 58.0) internal successors, (522), 9 states have internal predecessors, (522), 0 states have call successors, (0), 0 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 20:07:39,339 INFO L186 Difference]: Start difference. First operand has 49 places, 43 transitions, 116 flow. Second operand 8 states and 151 transitions. [2021-10-15 20:07:39,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 61 transitions, 256 flow [2021-10-15 20:07:39,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 246 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-10-15 20:07:39,346 INFO L242 Difference]: Finished difference. Result has 53 places, 47 transitions, 158 flow [2021-10-15 20:07:39,346 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=158, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2021-10-15 20:07:39,346 INFO L334 CegarLoopForPetriNet]: 39 programPoint places, 14 predicate places. [2021-10-15 20:07:39,346 INFO L470 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 158 flow [2021-10-15 20:07:39,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 20:07:39,347 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:39,347 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:39,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:07:39,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-15 20:07:39,563 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:07:39,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:39,563 INFO L82 PathProgramCache]: Analyzing trace with hash 916732292, now seen corresponding path program 1 times [2021-10-15 20:07:39,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:39,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156409437] [2021-10-15 20:07:39,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:39,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:39,588 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:07:39,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [646577804] [2021-10-15 20:07:39,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:39,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:39,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:07:39,595 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:07:39,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:07:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:39,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-15 20:07:39,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:07:39,952 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 20:07:39,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:39,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156409437] [2021-10-15 20:07:39,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:07:39,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646577804] [2021-10-15 20:07:39,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646577804] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:39,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:39,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-15 20:07:39,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427683698] [2021-10-15 20:07:39,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:07:39,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:39,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:07:39,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:07:39,958 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 58 [2021-10-15 20:07:39,958 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 158 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 20:07:39,958 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:39,958 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 58 [2021-10-15 20:07:39,958 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:40,327 INFO L129 PetriNetUnfolder]: 6/124 cut-off events. [2021-10-15 20:07:40,327 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-10-15 20:07:40,328 INFO L84 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 124 events. 6/124 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 282 event pairs, 0 based on Foata normal form. 1/109 useless extension candidates. Maximal degree in co-relation 284. Up to 36 conditions per place. [2021-10-15 20:07:40,329 INFO L132 encePairwiseOnDemand]: 41/58 looper letters, 64 selfloop transitions, 18 changer transitions 2/92 dead transitions. [2021-10-15 20:07:40,329 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 92 transitions, 459 flow [2021-10-15 20:07:40,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 20:07:40,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 20:07:40,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2021-10-15 20:07:40,335 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.31504702194357365 [2021-10-15 20:07:40,335 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 201 transitions. [2021-10-15 20:07:40,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 201 transitions. [2021-10-15 20:07:40,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:40,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 201 transitions. [2021-10-15 20:07:40,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 18.272727272727273) internal successors, (201), 11 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 20:07:40,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 0 states have call successors, (0), 0 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 20:07:40,340 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 0 states have call successors, (0), 0 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 20:07:40,340 INFO L186 Difference]: Start difference. First operand has 53 places, 47 transitions, 158 flow. Second operand 11 states and 201 transitions. [2021-10-15 20:07:40,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 92 transitions, 459 flow [2021-10-15 20:07:40,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 92 transitions, 448 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-10-15 20:07:40,345 INFO L242 Difference]: Finished difference. Result has 62 places, 57 transitions, 271 flow [2021-10-15 20:07:40,346 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=271, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2021-10-15 20:07:40,346 INFO L334 CegarLoopForPetriNet]: 39 programPoint places, 23 predicate places. [2021-10-15 20:07:40,346 INFO L470 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 271 flow [2021-10-15 20:07:40,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 20:07:40,346 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:40,347 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:40,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:07:40,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:40,571 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:07:40,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:40,571 INFO L82 PathProgramCache]: Analyzing trace with hash 2015957290, now seen corresponding path program 1 times [2021-10-15 20:07:40,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:40,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166063085] [2021-10-15 20:07:40,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:40,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:40,600 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:07:40,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100531082] [2021-10-15 20:07:40,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:40,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:40,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:07:40,605 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:07:40,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:07:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:40,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 20:07:40,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:07:40,885 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 20:07:40,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:40,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166063085] [2021-10-15 20:07:40,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:07:40,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100531082] [2021-10-15 20:07:40,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100531082] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:07:40,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:07:40,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 20:07:40,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243336578] [2021-10-15 20:07:40,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:07:40,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:40,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:07:40,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:07:40,899 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 58 [2021-10-15 20:07:40,900 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 271 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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 20:07:40,900 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:40,900 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 58 [2021-10-15 20:07:40,900 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:41,068 INFO L129 PetriNetUnfolder]: 6/114 cut-off events. [2021-10-15 20:07:41,069 INFO L130 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2021-10-15 20:07:41,070 INFO L84 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 114 events. 6/114 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 242 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 321. Up to 44 conditions per place. [2021-10-15 20:07:41,072 INFO L132 encePairwiseOnDemand]: 49/58 looper letters, 31 selfloop transitions, 15 changer transitions 0/55 dead transitions. [2021-10-15 20:07:41,072 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 55 transitions, 359 flow [2021-10-15 20:07:41,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:07:41,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 20:07:41,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2021-10-15 20:07:41,075 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.27586206896551724 [2021-10-15 20:07:41,075 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 128 transitions. [2021-10-15 20:07:41,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 128 transitions. [2021-10-15 20:07:41,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:41,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 128 transitions. [2021-10-15 20:07:41,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 16.0) internal successors, (128), 8 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 20:07:41,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 58.0) internal successors, (522), 9 states have internal predecessors, (522), 0 states have call successors, (0), 0 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 20:07:41,081 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 58.0) internal successors, (522), 9 states have internal predecessors, (522), 0 states have call successors, (0), 0 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 20:07:41,081 INFO L186 Difference]: Start difference. First operand has 62 places, 57 transitions, 271 flow. Second operand 8 states and 128 transitions. [2021-10-15 20:07:41,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 55 transitions, 359 flow [2021-10-15 20:07:41,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 55 transitions, 342 flow, removed 2 selfloop flow, removed 6 redundant places. [2021-10-15 20:07:41,100 INFO L242 Difference]: Finished difference. Result has 61 places, 55 transitions, 280 flow [2021-10-15 20:07:41,100 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=280, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2021-10-15 20:07:41,101 INFO L334 CegarLoopForPetriNet]: 39 programPoint places, 22 predicate places. [2021-10-15 20:07:41,101 INFO L470 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 280 flow [2021-10-15 20:07:41,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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 20:07:41,101 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:41,101 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:41,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:07:41,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:41,327 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:07:41,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:41,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1552659725, now seen corresponding path program 1 times [2021-10-15 20:07:41,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:41,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32810053] [2021-10-15 20:07:41,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:41,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:41,346 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:07:41,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284679626] [2021-10-15 20:07:41,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:41,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:41,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:07:41,348 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:07:41,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 20:07:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:41,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-15 20:07:41,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:07:42,026 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 20:07:42,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:42,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32810053] [2021-10-15 20:07:42,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:07:42,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284679626] [2021-10-15 20:07:42,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284679626] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:07:42,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:07:42,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 20:07:42,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849576223] [2021-10-15 20:07:42,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 20:07:42,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:42,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 20:07:42,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-15 20:07:42,031 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 58 [2021-10-15 20:07:42,031 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 280 flow. Second operand has 11 states, 11 states have (on average 13.090909090909092) internal successors, (144), 11 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 20:07:42,031 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:42,031 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 58 [2021-10-15 20:07:42,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:42,673 INFO L129 PetriNetUnfolder]: 4/113 cut-off events. [2021-10-15 20:07:42,673 INFO L130 PetriNetUnfolder]: For 95/95 co-relation queries the response was YES. [2021-10-15 20:07:42,673 INFO L84 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 113 events. 4/113 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 170 event pairs, 0 based on Foata normal form. 10/123 useless extension candidates. Maximal degree in co-relation 341. Up to 26 conditions per place. [2021-10-15 20:07:42,674 INFO L132 encePairwiseOnDemand]: 42/58 looper letters, 54 selfloop transitions, 26 changer transitions 2/86 dead transitions. [2021-10-15 20:07:42,674 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 86 transitions, 564 flow [2021-10-15 20:07:42,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 20:07:42,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 20:07:42,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 232 transitions. [2021-10-15 20:07:42,677 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2857142857142857 [2021-10-15 20:07:42,677 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 232 transitions. [2021-10-15 20:07:42,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 232 transitions. [2021-10-15 20:07:42,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:42,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 232 transitions. [2021-10-15 20:07:42,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 0 states have call successors, (0), 0 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 20:07:42,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 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 20:07:42,684 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 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 20:07:42,684 INFO L186 Difference]: Start difference. First operand has 61 places, 55 transitions, 280 flow. Second operand 14 states and 232 transitions. [2021-10-15 20:07:42,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 86 transitions, 564 flow [2021-10-15 20:07:42,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 86 transitions, 521 flow, removed 3 selfloop flow, removed 6 redundant places. [2021-10-15 20:07:42,693 INFO L242 Difference]: Finished difference. Result has 64 places, 54 transitions, 328 flow [2021-10-15 20:07:42,694 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=328, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2021-10-15 20:07:42,694 INFO L334 CegarLoopForPetriNet]: 39 programPoint places, 25 predicate places. [2021-10-15 20:07:42,694 INFO L470 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 328 flow [2021-10-15 20:07:42,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.090909090909092) internal successors, (144), 11 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 20:07:42,694 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:42,694 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:42,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 20:07:42,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-15 20:07:42,923 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:07:42,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:42,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1755069467, now seen corresponding path program 1 times [2021-10-15 20:07:42,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:42,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093562160] [2021-10-15 20:07:42,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:42,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:42,939 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:07:42,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907285048] [2021-10-15 20:07:42,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:42,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:42,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:07:42,941 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:07:42,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 20:07:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:43,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-15 20:07:43,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:07:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:07:43,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:43,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093562160] [2021-10-15 20:07:43,664 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:07:43,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907285048] [2021-10-15 20:07:43,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907285048] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:07:43,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:07:43,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 20:07:43,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861762822] [2021-10-15 20:07:43,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:07:43,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:43,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:07:43,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:07:43,667 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 58 [2021-10-15 20:07:43,667 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 328 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 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 20:07:43,667 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:43,667 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 58 [2021-10-15 20:07:43,667 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:43,935 INFO L129 PetriNetUnfolder]: 2/85 cut-off events. [2021-10-15 20:07:43,936 INFO L130 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2021-10-15 20:07:43,936 INFO L84 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 85 events. 2/85 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 3/88 useless extension candidates. Maximal degree in co-relation 271. Up to 42 conditions per place. [2021-10-15 20:07:43,937 INFO L132 encePairwiseOnDemand]: 43/58 looper letters, 44 selfloop transitions, 11 changer transitions 10/69 dead transitions. [2021-10-15 20:07:43,937 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 69 transitions, 471 flow [2021-10-15 20:07:43,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 20:07:43,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 20:07:43,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2021-10-15 20:07:43,940 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2884012539184953 [2021-10-15 20:07:43,940 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 184 transitions. [2021-10-15 20:07:43,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 184 transitions. [2021-10-15 20:07:43,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:43,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 184 transitions. [2021-10-15 20:07:43,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 16.727272727272727) internal successors, (184), 11 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 20:07:43,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 0 states have call successors, (0), 0 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 20:07:43,944 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 0 states have call successors, (0), 0 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 20:07:43,944 INFO L186 Difference]: Start difference. First operand has 64 places, 54 transitions, 328 flow. Second operand 11 states and 184 transitions. [2021-10-15 20:07:43,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 69 transitions, 471 flow [2021-10-15 20:07:43,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 428 flow, removed 11 selfloop flow, removed 9 redundant places. [2021-10-15 20:07:43,950 INFO L242 Difference]: Finished difference. Result has 68 places, 49 transitions, 282 flow [2021-10-15 20:07:43,950 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=282, PETRI_PLACES=68, PETRI_TRANSITIONS=49} [2021-10-15 20:07:43,950 INFO L334 CegarLoopForPetriNet]: 39 programPoint places, 29 predicate places. [2021-10-15 20:07:43,951 INFO L470 AbstractCegarLoop]: Abstraction has has 68 places, 49 transitions, 282 flow [2021-10-15 20:07:43,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 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 20:07:43,951 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:07:43,951 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:07:43,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 20:07:44,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:44,175 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 20:07:44,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:07:44,175 INFO L82 PathProgramCache]: Analyzing trace with hash -797667638, now seen corresponding path program 1 times [2021-10-15 20:07:44,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:07:44,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449027148] [2021-10-15 20:07:44,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:44,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:07:44,199 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:07:44,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870206576] [2021-10-15 20:07:44,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:07:44,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:44,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:07:44,208 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:07:44,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 20:07:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:07:44,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-15 20:07:44,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:07:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:07:45,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:07:45,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449027148] [2021-10-15 20:07:45,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:07:45,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870206576] [2021-10-15 20:07:45,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870206576] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:07:45,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:07:45,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 20:07:45,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256592575] [2021-10-15 20:07:45,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 20:07:45,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:07:45,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 20:07:45,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-15 20:07:45,232 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 58 [2021-10-15 20:07:45,232 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 49 transitions, 282 flow. Second operand has 11 states, 11 states have (on average 14.0) internal successors, (154), 11 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:45,232 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:07:45,232 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 58 [2021-10-15 20:07:45,233 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:07:45,463 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-10-15 20:07:45,464 INFO L130 PetriNetUnfolder]: For 83/83 co-relation queries the response was YES. [2021-10-15 20:07:45,464 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 38 events. 0/38 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 3/41 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-10-15 20:07:45,464 INFO L132 encePairwiseOnDemand]: 44/58 looper letters, 0 selfloop transitions, 0 changer transitions 38/38 dead transitions. [2021-10-15 20:07:45,464 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 38 transitions, 266 flow [2021-10-15 20:07:45,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 20:07:45,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 20:07:45,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 194 transitions. [2021-10-15 20:07:45,467 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.23891625615763548 [2021-10-15 20:07:45,467 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 194 transitions. [2021-10-15 20:07:45,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 194 transitions. [2021-10-15 20:07:45,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:07:45,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 194 transitions. [2021-10-15 20:07:45,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 13.857142857142858) internal successors, (194), 14 states have internal predecessors, (194), 0 states have call successors, (0), 0 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 20:07:45,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 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 20:07:45,471 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 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 20:07:45,471 INFO L186 Difference]: Start difference. First operand has 68 places, 49 transitions, 282 flow. Second operand 14 states and 194 transitions. [2021-10-15 20:07:45,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 38 transitions, 266 flow [2021-10-15 20:07:45,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 38 transitions, 200 flow, removed 0 selfloop flow, removed 18 redundant places. [2021-10-15 20:07:45,474 INFO L242 Difference]: Finished difference. Result has 53 places, 0 transitions, 0 flow [2021-10-15 20:07:45,474 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=0, PETRI_PLACES=53, PETRI_TRANSITIONS=0} [2021-10-15 20:07:45,474 INFO L334 CegarLoopForPetriNet]: 39 programPoint places, 14 predicate places. [2021-10-15 20:07:45,474 INFO L470 AbstractCegarLoop]: Abstraction has has 53 places, 0 transitions, 0 flow [2021-10-15 20:07:45,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.0) internal successors, (154), 11 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:07:45,477 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:07:45,478 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:07:45,478 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:07:45,478 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:07:45,478 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:07:45,479 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:07:45,479 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:07:45,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 20:07:45,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:07:45,699 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:07:45,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:07:45 BoogieIcfgContainer [2021-10-15 20:07:45,703 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:07:45,704 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:07:45,704 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:07:45,704 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:07:45,705 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:07:36" (3/4) ... [2021-10-15 20:07:45,708 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:07:45,717 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-10-15 20:07:45,717 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 20:07:45,717 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:07:45,718 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:07:45,775 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:07:45,775 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:07:45,777 INFO L168 Benchmark]: Toolchain (without parser) took 9649.30 ms. Allocated memory was 130.0 MB in the beginning and 195.0 MB in the end (delta: 65.0 MB). Free memory was 102.9 MB in the beginning and 135.1 MB in the end (delta: -32.2 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.1 GB. [2021-10-15 20:07:45,777 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 130.0 MB. Free memory was 85.6 MB in the beginning and 85.5 MB in the end (delta: 65.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:07:45,778 INFO L168 Benchmark]: CACSL2BoogieTranslator took 392.03 ms. Allocated memory was 130.0 MB in the beginning and 161.5 MB in the end (delta: 31.5 MB). Free memory was 102.6 MB in the beginning and 134.0 MB in the end (delta: -31.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:07:45,778 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.99 ms. Allocated memory is still 161.5 MB. Free memory was 134.0 MB in the beginning and 132.3 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:07:45,779 INFO L168 Benchmark]: Boogie Preprocessor took 34.88 ms. Allocated memory is still 161.5 MB. Free memory was 132.3 MB in the beginning and 131.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:07:45,779 INFO L168 Benchmark]: RCFGBuilder took 366.97 ms. Allocated memory is still 161.5 MB. Free memory was 131.1 MB in the beginning and 120.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:07:45,780 INFO L168 Benchmark]: TraceAbstraction took 8713.22 ms. Allocated memory was 161.5 MB in the beginning and 195.0 MB in the end (delta: 33.6 MB). Free memory was 119.5 MB in the beginning and 138.2 MB in the end (delta: -18.8 MB). Peak memory consumption was 16.7 MB. Max. memory is 16.1 GB. [2021-10-15 20:07:45,780 INFO L168 Benchmark]: Witness Printer took 70.98 ms. Allocated memory is still 195.0 MB. Free memory was 138.2 MB in the beginning and 135.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:07:45,782 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 130.0 MB. Free memory was 85.6 MB in the beginning and 85.5 MB in the end (delta: 65.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 392.03 ms. Allocated memory was 130.0 MB in the beginning and 161.5 MB in the end (delta: 31.5 MB). Free memory was 102.6 MB in the beginning and 134.0 MB in the end (delta: -31.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.99 ms. Allocated memory is still 161.5 MB. Free memory was 134.0 MB in the beginning and 132.3 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.88 ms. Allocated memory is still 161.5 MB. Free memory was 132.3 MB in the beginning and 131.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 366.97 ms. Allocated memory is still 161.5 MB. Free memory was 131.1 MB in the beginning and 120.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8713.22 ms. Allocated memory was 161.5 MB in the beginning and 195.0 MB in the end (delta: 33.6 MB). Free memory was 119.5 MB in the beginning and 138.2 MB in the end (delta: -18.8 MB). Peak memory consumption was 16.7 MB. Max. memory is 16.1 GB. * Witness Printer took 70.98 ms. Allocated memory is still 195.0 MB. Free memory was 138.2 MB in the beginning and 135.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 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, 43 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 5.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 8571.6ms, OverallIterations: 8, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 2440.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 55.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 114 SDtfs, 799 SDslu, 221 SDs, 0 SdLazy, 780 SolverSat, 161 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 672.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 178 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1632.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=328occurred in iteration=6, InterpolantAutomatonStates: 76, 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: 63.6ms SsaConstructionTime, 200.5ms SatisfiabilityAnalysisTime, 3307.6ms InterpolantComputationTime, 157 NumberOfCodeBlocks, 157 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 149 ConstructedInterpolants, 0 QuantifiedInterpolants, 1610 SizeOfPredicates, 60 NumberOfNonLiveVariables, 673 ConjunctsInSsa, 132 ConjunctsInUnsatCore, 8 InterpolantComputations, 5 PerfectInterpolantSequences, 0/17 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 20:07:45,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1ebe030-f91e-4776-a181-875714b76a3f/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...