./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i --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_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/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_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/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_b04bd64a-3e02-4442-be6c-35f95d5ce017/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 4ee28ec995fb5882fcf61d05ce458a0308013601 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/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_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/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 4ee28ec995fb5882fcf61d05ce458a0308013601 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:30:04,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:30:05,002 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:30:05,086 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:30:05,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:30:05,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:30:05,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:30:05,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:30:05,109 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:30:05,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:30:05,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:30:05,124 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:30:05,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:30:05,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:30:05,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:30:05,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:30:05,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:30:05,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:30:05,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:30:05,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:30:05,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:30:05,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:30:05,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:30:05,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:30:05,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:30:05,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:30:05,167 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:30:05,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:30:05,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:30:05,174 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:30:05,174 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:30:05,176 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:30:05,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:30:05,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:30:05,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:30:05,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:30:05,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:30:05,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:30:05,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:30:05,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:30:05,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:30:05,190 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:30:05,250 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:30:05,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:30:05,251 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:30:05,252 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:30:05,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:30:05,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:30:05,262 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:30:05,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:30:05,263 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:30:05,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:30:05,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:30:05,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:30:05,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:30:05,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:30:05,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:30:05,266 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:30:05,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:30:05,267 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:30:05,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:30:05,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:30:05,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:30:05,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:30:05,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:30:05,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:30:05,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:30:05,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:30:05,270 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:30:05,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:30:05,271 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:30:05,273 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:30:05,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:30:05,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:30:05,274 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ee28ec995fb5882fcf61d05ce458a0308013601 [2021-10-15 19:30:05,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:30:05,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:30:05,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:30:05,720 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:30:05,721 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:30:05,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i [2021-10-15 19:30:05,819 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/data/5e7ce47ea/041d82d2fa5f4493a40ec1af2eb082b4/FLAG2219420c7 [2021-10-15 19:30:06,543 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:30:06,545 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i [2021-10-15 19:30:06,575 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/data/5e7ce47ea/041d82d2fa5f4493a40ec1af2eb082b4/FLAG2219420c7 [2021-10-15 19:30:06,742 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/data/5e7ce47ea/041d82d2fa5f4493a40ec1af2eb082b4 [2021-10-15 19:30:06,745 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:30:06,747 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:30:06,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:30:06,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:30:06,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:30:06,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:30:06" (1/1) ... [2021-10-15 19:30:06,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@774f927b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:06, skipping insertion in model container [2021-10-15 19:30:06,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:30:06" (1/1) ... [2021-10-15 19:30:06,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:30:06,855 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:30:07,288 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22569,22582] [2021-10-15 19:30:07,295 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22645,22658] [2021-10-15 19:30:07,300 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22715,22728] [2021-10-15 19:30:07,303 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22822,22835] [2021-10-15 19:30:07,307 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22894,22907] [2021-10-15 19:30:07,310 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[23045,23058] [2021-10-15 19:30:07,312 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[23119,23132] [2021-10-15 19:30:07,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:30:07,340 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:30:07,403 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22569,22582] [2021-10-15 19:30:07,404 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22645,22658] [2021-10-15 19:30:07,405 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22715,22728] [2021-10-15 19:30:07,406 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22822,22835] [2021-10-15 19:30:07,408 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22894,22907] [2021-10-15 19:30:07,410 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[23045,23058] [2021-10-15 19:30:07,411 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[23119,23132] [2021-10-15 19:30:07,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:30:07,462 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:30:07,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:07 WrapperNode [2021-10-15 19:30:07,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:30:07,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:30:07,465 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:30:07,465 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:30:07,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:07" (1/1) ... [2021-10-15 19:30:07,494 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:07" (1/1) ... [2021-10-15 19:30:07,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:30:07,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:30:07,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:30:07,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:30:07,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:07" (1/1) ... [2021-10-15 19:30:07,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:07" (1/1) ... [2021-10-15 19:30:07,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:07" (1/1) ... [2021-10-15 19:30:07,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:07" (1/1) ... [2021-10-15 19:30:07,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:07" (1/1) ... [2021-10-15 19:30:07,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:07" (1/1) ... [2021-10-15 19:30:07,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:07" (1/1) ... [2021-10-15 19:30:07,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:30:07,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:30:07,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:30:07,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:30:07,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:07" (1/1) ... [2021-10-15 19:30:07,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:30:07,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:07,638 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:07,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:30:07,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 19:30:07,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 19:30:07,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 19:30:07,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 19:30:07,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:30:07,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 19:30:07,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:30:07,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:30:07,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:30:07,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:30:08,386 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:30:08,386 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-15 19:30:08,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:30:08 BoogieIcfgContainer [2021-10-15 19:30:08,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:30:08,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:30:08,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:30:08,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:30:08,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:30:06" (1/3) ... [2021-10-15 19:30:08,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d90778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:30:08, skipping insertion in model container [2021-10-15 19:30:08,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:07" (2/3) ... [2021-10-15 19:30:08,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d90778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:30:08, skipping insertion in model container [2021-10-15 19:30:08,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:30:08" (3/3) ... [2021-10-15 19:30:08,410 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-cnstr_1-1.i [2021-10-15 19:30:08,421 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:30:08,424 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-15 19:30:08,547 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:30:08,557 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 19:30:08,558 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-15 19:30:08,581 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 47 places, 76 transitions, 152 flow [2021-10-15 19:30:08,634 INFO L129 PetriNetUnfolder]: 30/76 cut-off events. [2021-10-15 19:30:08,635 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:30:08,637 INFO L84 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 76 events. 30/76 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 200 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-10-15 19:30:08,638 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 76 transitions, 152 flow [2021-10-15 19:30:08,658 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 66 transitions, 132 flow [2021-10-15 19:30:08,667 INFO L129 PetriNetUnfolder]: 5/17 cut-off events. [2021-10-15 19:30:08,667 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:30:08,668 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:30:08,668 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 19:30:08,669 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:30:08,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:08,676 INFO L82 PathProgramCache]: Analyzing trace with hash 891600134, now seen corresponding path program 1 times [2021-10-15 19:30:08,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:08,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904947954] [2021-10-15 19:30:08,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:08,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:08,898 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 19:30:08,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:08,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904947954] [2021-10-15 19:30:08,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904947954] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:30:08,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:30:08,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:30:08,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265054206] [2021-10-15 19:30:08,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 19:30:08,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:30:08,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 19:30:08,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 19:30:08,945 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 76 [2021-10-15 19:30:08,949 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 66 transitions, 132 flow. Second operand has 2 states, 2 states have (on average 52.5) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:30:08,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:30:08,950 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 76 [2021-10-15 19:30:08,952 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:30:08,968 INFO L129 PetriNetUnfolder]: 4/44 cut-off events. [2021-10-15 19:30:08,968 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:30:08,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 44 events. 4/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 22/56 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2021-10-15 19:30:08,971 INFO L132 encePairwiseOnDemand]: 54/76 looper letters, 0 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2021-10-15 19:30:08,972 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 44 transitions, 88 flow [2021-10-15 19:30:08,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:30:08,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 19:30:08,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 126 transitions. [2021-10-15 19:30:08,988 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8289473684210527 [2021-10-15 19:30:08,989 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 126 transitions. [2021-10-15 19:30:08,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 126 transitions. [2021-10-15 19:30:08,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:30:08,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 126 transitions. [2021-10-15 19:30:08,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 63.0) internal successors, (126), 2 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:30:09,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 19:30:09,005 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 19:30:09,007 INFO L186 Difference]: Start difference. First operand has 41 places, 66 transitions, 132 flow. Second operand 2 states and 126 transitions. [2021-10-15 19:30:09,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 44 transitions, 88 flow [2021-10-15 19:30:09,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 88 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:30:09,016 INFO L242 Difference]: Finished difference. Result has 42 places, 44 transitions, 88 flow [2021-10-15 19:30:09,019 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=88, PETRI_PLACES=42, PETRI_TRANSITIONS=44} [2021-10-15 19:30:09,020 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2021-10-15 19:30:09,021 INFO L470 AbstractCegarLoop]: Abstraction has has 42 places, 44 transitions, 88 flow [2021-10-15 19:30:09,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 52.5) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:30:09,022 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:30:09,022 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:09,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:30:09,023 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:30:09,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:09,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1806905862, now seen corresponding path program 1 times [2021-10-15 19:30:09,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:09,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456535864] [2021-10-15 19:30:09,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:09,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:09,121 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 19:30:09,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:09,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456535864] [2021-10-15 19:30:09,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456535864] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:30:09,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:30:09,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:30:09,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635941757] [2021-10-15 19:30:09,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:30:09,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:30:09,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:30:09,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:30:09,129 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 76 [2021-10-15 19:30:09,137 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 44 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:30:09,139 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:30:09,140 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 76 [2021-10-15 19:30:09,140 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:30:09,254 INFO L129 PetriNetUnfolder]: 5/44 cut-off events. [2021-10-15 19:30:09,255 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:30:09,255 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 44 events. 5/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 67 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 63. Up to 11 conditions per place. [2021-10-15 19:30:09,256 INFO L132 encePairwiseOnDemand]: 71/76 looper letters, 16 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2021-10-15 19:30:09,256 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 43 transitions, 124 flow [2021-10-15 19:30:09,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:30:09,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:30:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2021-10-15 19:30:09,260 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4506578947368421 [2021-10-15 19:30:09,261 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 137 transitions. [2021-10-15 19:30:09,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 137 transitions. [2021-10-15 19:30:09,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:30:09,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 137 transitions. [2021-10-15 19:30:09,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 19:30:09,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states 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 19:30:09,267 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states 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 19:30:09,267 INFO L186 Difference]: Start difference. First operand has 42 places, 44 transitions, 88 flow. Second operand 4 states and 137 transitions. [2021-10-15 19:30:09,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 43 transitions, 124 flow [2021-10-15 19:30:09,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 124 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:30:09,271 INFO L242 Difference]: Finished difference. Result has 42 places, 42 transitions, 97 flow [2021-10-15 19:30:09,272 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2021-10-15 19:30:09,273 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2021-10-15 19:30:09,273 INFO L470 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 97 flow [2021-10-15 19:30:09,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:30:09,274 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:30:09,274 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:09,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:30:09,275 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:30:09,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:09,275 INFO L82 PathProgramCache]: Analyzing trace with hash 179566605, now seen corresponding path program 1 times [2021-10-15 19:30:09,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:09,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138001253] [2021-10-15 19:30:09,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:09,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:09,377 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 19:30:09,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:09,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138001253] [2021-10-15 19:30:09,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138001253] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:30:09,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:30:09,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:30:09,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950970464] [2021-10-15 19:30:09,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:30:09,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:30:09,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:30:09,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:30:09,385 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 76 [2021-10-15 19:30:09,385 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 19:30:09,386 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:30:09,386 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 76 [2021-10-15 19:30:09,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:30:09,491 INFO L129 PetriNetUnfolder]: 5/42 cut-off events. [2021-10-15 19:30:09,491 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-15 19:30:09,492 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 42 events. 5/42 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 70. Up to 15 conditions per place. [2021-10-15 19:30:09,494 INFO L132 encePairwiseOnDemand]: 68/76 looper letters, 13 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2021-10-15 19:30:09,494 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 133 flow [2021-10-15 19:30:09,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:30:09,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:30:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2021-10-15 19:30:09,502 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41776315789473684 [2021-10-15 19:30:09,502 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 127 transitions. [2021-10-15 19:30:09,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 127 transitions. [2021-10-15 19:30:09,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:30:09,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 127 transitions. [2021-10-15 19:30:09,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:30:09,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states 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 19:30:09,510 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states 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 19:30:09,512 INFO L186 Difference]: Start difference. First operand has 42 places, 42 transitions, 97 flow. Second operand 4 states and 127 transitions. [2021-10-15 19:30:09,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 133 flow [2021-10-15 19:30:09,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 132 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:30:09,518 INFO L242 Difference]: Finished difference. Result has 42 places, 40 transitions, 106 flow [2021-10-15 19:30:09,519 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2021-10-15 19:30:09,519 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2021-10-15 19:30:09,520 INFO L470 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 106 flow [2021-10-15 19:30:09,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 19:30:09,520 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:30:09,521 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:09,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:30:09,521 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:30:09,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:09,522 INFO L82 PathProgramCache]: Analyzing trace with hash 711412120, now seen corresponding path program 1 times [2021-10-15 19:30:09,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:09,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021334167] [2021-10-15 19:30:09,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:09,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:09,737 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 19:30:09,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:09,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021334167] [2021-10-15 19:30:09,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021334167] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:30:09,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:30:09,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:30:09,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062545066] [2021-10-15 19:30:09,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:30:09,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:30:09,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:30:09,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:30:09,742 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 76 [2021-10-15 19:30:09,742 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:30:09,743 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:30:09,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 76 [2021-10-15 19:30:09,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:30:09,981 INFO L129 PetriNetUnfolder]: 8/68 cut-off events. [2021-10-15 19:30:09,982 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-10-15 19:30:09,983 INFO L84 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 68 events. 8/68 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 97 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 126. Up to 18 conditions per place. [2021-10-15 19:30:09,986 INFO L132 encePairwiseOnDemand]: 66/76 looper letters, 25 selfloop transitions, 10 changer transitions 0/54 dead transitions. [2021-10-15 19:30:09,986 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 218 flow [2021-10-15 19:30:09,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:30:09,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:30:09,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2021-10-15 19:30:09,992 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2021-10-15 19:30:09,992 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 190 transitions. [2021-10-15 19:30:09,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 190 transitions. [2021-10-15 19:30:09,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:30:09,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 190 transitions. [2021-10-15 19:30:09,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.666666666666668) internal successors, (190), 6 states have internal predecessors, (190), 0 states have call successors, (0), 0 states 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 19:30:09,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states 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 19:30:10,000 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states 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 19:30:10,000 INFO L186 Difference]: Start difference. First operand has 42 places, 40 transitions, 106 flow. Second operand 6 states and 190 transitions. [2021-10-15 19:30:10,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 218 flow [2021-10-15 19:30:10,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 54 transitions, 200 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 19:30:10,008 INFO L242 Difference]: Finished difference. Result has 47 places, 46 transitions, 154 flow [2021-10-15 19:30:10,012 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2021-10-15 19:30:10,012 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2021-10-15 19:30:10,012 INFO L470 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 154 flow [2021-10-15 19:30:10,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:30:10,013 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:30:10,013 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:10,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:30:10,014 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:30:10,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:10,021 INFO L82 PathProgramCache]: Analyzing trace with hash 463380118, now seen corresponding path program 1 times [2021-10-15 19:30:10,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:10,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495345770] [2021-10-15 19:30:10,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:10,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:10,226 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 19:30:10,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:10,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495345770] [2021-10-15 19:30:10,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495345770] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:30:10,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:30:10,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:30:10,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474987184] [2021-10-15 19:30:10,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:30:10,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:30:10,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:30:10,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:30:10,230 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 76 [2021-10-15 19:30:10,231 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 19:30:10,231 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:30:10,231 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 76 [2021-10-15 19:30:10,231 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:30:10,362 INFO L129 PetriNetUnfolder]: 8/66 cut-off events. [2021-10-15 19:30:10,363 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2021-10-15 19:30:10,363 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 66 events. 8/66 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 91 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 135. Up to 25 conditions per place. [2021-10-15 19:30:10,364 INFO L132 encePairwiseOnDemand]: 71/76 looper letters, 19 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2021-10-15 19:30:10,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 198 flow [2021-10-15 19:30:10,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:30:10,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:30:10,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2021-10-15 19:30:10,367 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4407894736842105 [2021-10-15 19:30:10,367 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 134 transitions. [2021-10-15 19:30:10,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 134 transitions. [2021-10-15 19:30:10,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:30:10,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 134 transitions. [2021-10-15 19:30:10,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 19:30:10,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states 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 19:30:10,371 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states 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 19:30:10,371 INFO L186 Difference]: Start difference. First operand has 47 places, 46 transitions, 154 flow. Second operand 4 states and 134 transitions. [2021-10-15 19:30:10,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 198 flow [2021-10-15 19:30:10,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 44 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:30:10,375 INFO L242 Difference]: Finished difference. Result has 47 places, 44 transitions, 154 flow [2021-10-15 19:30:10,375 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2021-10-15 19:30:10,376 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2021-10-15 19:30:10,376 INFO L470 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 154 flow [2021-10-15 19:30:10,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 19:30:10,377 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:30:10,377 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:10,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:30:10,378 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:30:10,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:10,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1285114177, now seen corresponding path program 1 times [2021-10-15 19:30:10,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:10,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748996712] [2021-10-15 19:30:10,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:10,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:10,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:10,553 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 19:30:10,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:10,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748996712] [2021-10-15 19:30:10,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748996712] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:30:10,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:30:10,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:30:10,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49042684] [2021-10-15 19:30:10,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:30:10,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:30:10,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:30:10,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:30:10,566 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 76 [2021-10-15 19:30:10,566 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:30:10,566 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:30:10,567 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 76 [2021-10-15 19:30:10,567 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:30:10,774 INFO L129 PetriNetUnfolder]: 6/64 cut-off events. [2021-10-15 19:30:10,774 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2021-10-15 19:30:10,775 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 64 events. 6/64 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 2/60 useless extension candidates. Maximal degree in co-relation 133. Up to 25 conditions per place. [2021-10-15 19:30:10,775 INFO L132 encePairwiseOnDemand]: 64/76 looper letters, 12 selfloop transitions, 16 changer transitions 0/44 dead transitions. [2021-10-15 19:30:10,776 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 44 transitions, 199 flow [2021-10-15 19:30:10,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:30:10,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:30:10,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2021-10-15 19:30:10,779 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4052631578947368 [2021-10-15 19:30:10,779 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 154 transitions. [2021-10-15 19:30:10,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 154 transitions. [2021-10-15 19:30:10,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:30:10,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 154 transitions. [2021-10-15 19:30:10,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 30.8) internal successors, (154), 5 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 19:30:10,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 0 states have call successors, (0), 0 states 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 19:30:10,783 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 0 states have call successors, (0), 0 states 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 19:30:10,783 INFO L186 Difference]: Start difference. First operand has 47 places, 44 transitions, 154 flow. Second operand 5 states and 154 transitions. [2021-10-15 19:30:10,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 44 transitions, 199 flow [2021-10-15 19:30:10,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 189 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 19:30:10,787 INFO L242 Difference]: Finished difference. Result has 50 places, 44 transitions, 184 flow [2021-10-15 19:30:10,787 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=184, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2021-10-15 19:30:10,788 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2021-10-15 19:30:10,788 INFO L470 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 184 flow [2021-10-15 19:30:10,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:30:10,789 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:30:10,789 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:10,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:30:10,790 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:30:10,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:10,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1621160418, now seen corresponding path program 1 times [2021-10-15 19:30:10,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:10,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764393128] [2021-10-15 19:30:10,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:10,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:30:10,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:10,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764393128] [2021-10-15 19:30:10,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764393128] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:10,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117681433] [2021-10-15 19:30:10,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:10,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:30:10,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:10,933 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:30:10,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:30:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:11,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 19:30:11,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:11,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:30:11,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:30:11,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:30:11,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-15 19:30:11,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:30:11,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:30:11,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:30:11,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-15 19:30:11,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:30:11,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-10-15 19:30:11,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:30:11,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-10-15 19:30:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:30:11,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117681433] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:11,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:30:11,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-15 19:30:11,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180463804] [2021-10-15 19:30:11,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:30:11,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:30:11,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:30:11,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:30:11,560 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 76 [2021-10-15 19:30:11,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 184 flow. Second operand has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 states have internal predecessors, (218), 0 states have call successors, (0), 0 states 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 19:30:11,561 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:30:11,561 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 76 [2021-10-15 19:30:11,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:30:11,855 INFO L129 PetriNetUnfolder]: 4/51 cut-off events. [2021-10-15 19:30:11,855 INFO L130 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2021-10-15 19:30:11,856 INFO L84 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 51 events. 4/51 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 35 event pairs, 0 based on Foata normal form. 1/49 useless extension candidates. Maximal degree in co-relation 129. Up to 11 conditions per place. [2021-10-15 19:30:11,856 INFO L132 encePairwiseOnDemand]: 70/76 looper letters, 15 selfloop transitions, 4 changer transitions 6/46 dead transitions. [2021-10-15 19:30:11,856 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 46 transitions, 240 flow [2021-10-15 19:30:11,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:30:11,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:30:11,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 197 transitions. [2021-10-15 19:30:11,858 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43201754385964913 [2021-10-15 19:30:11,858 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 197 transitions. [2021-10-15 19:30:11,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 197 transitions. [2021-10-15 19:30:11,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:30:11,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 197 transitions. [2021-10-15 19:30:11,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 32.833333333333336) internal successors, (197), 6 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:30:11,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states 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 19:30:11,861 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states 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 19:30:11,861 INFO L186 Difference]: Start difference. First operand has 50 places, 44 transitions, 184 flow. Second operand 6 states and 197 transitions. [2021-10-15 19:30:11,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 46 transitions, 240 flow [2021-10-15 19:30:11,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 46 transitions, 220 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 19:30:11,865 INFO L242 Difference]: Finished difference. Result has 53 places, 40 transitions, 145 flow [2021-10-15 19:30:11,865 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=145, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2021-10-15 19:30:11,866 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2021-10-15 19:30:11,866 INFO L470 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 145 flow [2021-10-15 19:30:11,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 states have internal predecessors, (218), 0 states have call successors, (0), 0 states 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 19:30:11,866 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:30:11,867 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] [2021-10-15 19:30:11,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:12,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:30:12,085 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:30:12,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:12,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1670451054, now seen corresponding path program 1 times [2021-10-15 19:30:12,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:12,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081836773] [2021-10-15 19:30:12,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:12,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:12,235 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 19:30:12,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:12,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081836773] [2021-10-15 19:30:12,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081836773] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:12,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667739625] [2021-10-15 19:30:12,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:12,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:30:12,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:12,238 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:30:12,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:30:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:12,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-15 19:30:12,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:12,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 19:30:12,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 19:30:12,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:30:12,561 INFO L354 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2021-10-15 19:30:12,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 72 [2021-10-15 19:30:12,608 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-15 19:30:12,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2021-10-15 19:30:12,641 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-15 19:30:12,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-10-15 19:30:12,737 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-15 19:30:12,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-15 19:30:13,398 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-15 19:30:13,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 14 [2021-10-15 19:30:13,406 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 19:30:13,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667739625] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:13,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:30:13,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-15 19:30:13,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775585784] [2021-10-15 19:30:13,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:30:13,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:30:13,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:30:13,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:30:13,410 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 76 [2021-10-15 19:30:13,411 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 145 flow. Second operand has 11 states, 11 states have (on average 27.818181818181817) internal successors, (306), 11 states have internal predecessors, (306), 0 states have call successors, (0), 0 states 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 19:30:13,412 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:30:13,412 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 76 [2021-10-15 19:30:13,412 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:30:14,220 INFO L129 PetriNetUnfolder]: 10/112 cut-off events. [2021-10-15 19:30:14,220 INFO L130 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2021-10-15 19:30:14,221 INFO L84 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 112 events. 10/112 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 201 event pairs, 0 based on Foata normal form. 2/108 useless extension candidates. Maximal degree in co-relation 255. Up to 17 conditions per place. [2021-10-15 19:30:14,221 INFO L132 encePairwiseOnDemand]: 67/76 looper letters, 38 selfloop transitions, 20 changer transitions 0/76 dead transitions. [2021-10-15 19:30:14,222 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 421 flow [2021-10-15 19:30:14,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 19:30:14,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 19:30:14,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 398 transitions. [2021-10-15 19:30:14,225 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.402834008097166 [2021-10-15 19:30:14,225 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 398 transitions. [2021-10-15 19:30:14,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 398 transitions. [2021-10-15 19:30:14,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:30:14,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 398 transitions. [2021-10-15 19:30:14,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 30.615384615384617) internal successors, (398), 13 states have internal predecessors, (398), 0 states have call successors, (0), 0 states 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 19:30:14,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 76.0) internal successors, (1064), 14 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states 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 19:30:14,231 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 76.0) internal successors, (1064), 14 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states 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 19:30:14,232 INFO L186 Difference]: Start difference. First operand has 53 places, 40 transitions, 145 flow. Second operand 13 states and 398 transitions. [2021-10-15 19:30:14,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 421 flow [2021-10-15 19:30:14,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 76 transitions, 368 flow, removed 13 selfloop flow, removed 7 redundant places. [2021-10-15 19:30:14,237 INFO L242 Difference]: Finished difference. Result has 57 places, 54 transitions, 240 flow [2021-10-15 19:30:14,238 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=240, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2021-10-15 19:30:14,238 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2021-10-15 19:30:14,238 INFO L470 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 240 flow [2021-10-15 19:30:14,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 27.818181818181817) internal successors, (306), 11 states have internal predecessors, (306), 0 states have call successors, (0), 0 states 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 19:30:14,239 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:30:14,239 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:14,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:14,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-15 19:30:14,443 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:30:14,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:14,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1572363688, now seen corresponding path program 1 times [2021-10-15 19:30:14,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:14,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684993403] [2021-10-15 19:30:14,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:14,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:14,870 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 19:30:14,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:14,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684993403] [2021-10-15 19:30:14,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684993403] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:14,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868075098] [2021-10-15 19:30:14,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:14,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:30:14,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:14,873 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:30:14,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:30:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:15,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-15 19:30:15,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:15,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 19:30:15,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:30:15,154 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-15 19:30:15,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 163 treesize of output 125 [2021-10-15 19:30:15,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:30:15,191 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-15 19:30:15,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 97 treesize of output 59 [2021-10-15 19:30:15,204 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-15 19:30:15,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 56 [2021-10-15 19:30:15,331 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-15 19:30:15,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 93 [2021-10-15 19:30:15,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 98 [2021-10-15 19:30:15,346 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-15 19:30:15,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 80 [2021-10-15 19:30:16,320 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-15 19:30:16,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 52 [2021-10-15 19:30:16,328 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-15 19:30:16,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 24 [2021-10-15 19:30:16,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-15 19:30:16,401 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 19:30:16,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868075098] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:16,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:30:16,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 18 [2021-10-15 19:30:16,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155429224] [2021-10-15 19:30:16,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-15 19:30:16,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:30:16,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-15 19:30:16,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-10-15 19:30:16,405 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 76 [2021-10-15 19:30:16,406 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 240 flow. Second operand has 18 states, 18 states have (on average 26.72222222222222) internal successors, (481), 18 states have internal predecessors, (481), 0 states have call successors, (0), 0 states 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 19:30:16,407 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:30:16,407 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 76 [2021-10-15 19:30:16,407 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:30:17,657 INFO L129 PetriNetUnfolder]: 11/127 cut-off events. [2021-10-15 19:30:17,658 INFO L130 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2021-10-15 19:30:17,658 INFO L84 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 127 events. 11/127 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 280 event pairs, 0 based on Foata normal form. 1/119 useless extension candidates. Maximal degree in co-relation 293. Up to 46 conditions per place. [2021-10-15 19:30:17,659 INFO L132 encePairwiseOnDemand]: 65/76 looper letters, 43 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2021-10-15 19:30:17,660 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 75 transitions, 433 flow [2021-10-15 19:30:17,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 19:30:17,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 19:30:17,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 375 transitions. [2021-10-15 19:30:17,665 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.37955465587044535 [2021-10-15 19:30:17,665 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 375 transitions. [2021-10-15 19:30:17,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 375 transitions. [2021-10-15 19:30:17,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:30:17,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 375 transitions. [2021-10-15 19:30:17,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 28.846153846153847) internal successors, (375), 13 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 19:30:17,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 76.0) internal successors, (1064), 14 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states 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 19:30:17,671 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 76.0) internal successors, (1064), 14 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states 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 19:30:17,671 INFO L186 Difference]: Start difference. First operand has 57 places, 54 transitions, 240 flow. Second operand 13 states and 375 transitions. [2021-10-15 19:30:17,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 75 transitions, 433 flow [2021-10-15 19:30:17,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 75 transitions, 431 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:30:17,678 INFO L242 Difference]: Finished difference. Result has 73 places, 61 transitions, 339 flow [2021-10-15 19:30:17,678 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=339, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2021-10-15 19:30:17,679 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2021-10-15 19:30:17,679 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 339 flow [2021-10-15 19:30:17,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 26.72222222222222) internal successors, (481), 18 states have internal predecessors, (481), 0 states have call successors, (0), 0 states 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 19:30:17,679 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:30:17,680 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:17,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:17,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:30:17,898 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:30:17,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:17,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1438350182, now seen corresponding path program 1 times [2021-10-15 19:30:17,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:17,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542351829] [2021-10-15 19:30:17,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:17,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:18,267 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 19:30:18,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:18,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542351829] [2021-10-15 19:30:18,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542351829] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:18,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663777589] [2021-10-15 19:30:18,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:18,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:30:18,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:18,270 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:30:18,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:30:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:18,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-15 19:30:18,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:18,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 19:30:18,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:30:18,639 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-15 19:30:18,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-10-15 19:30:18,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:30:18,668 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-10-15 19:30:18,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 62 [2021-10-15 19:30:18,689 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-15 19:30:18,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-10-15 19:30:18,887 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-15 19:30:18,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 661 treesize of output 409 [2021-10-15 19:30:19,107 INFO L354 Elim1Store]: treesize reduction 331, result has 12.0 percent of original size [2021-10-15 19:30:19,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 228 treesize of output 154 [2021-10-15 19:30:19,297 INFO L354 Elim1Store]: treesize reduction 796, result has 8.8 percent of original size [2021-10-15 19:30:19,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 218 treesize of output 187 [2021-10-15 19:30:19,323 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-10-15 19:30:19,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 167 treesize of output 177 [2021-10-15 19:30:22,579 INFO L354 Elim1Store]: treesize reduction 108, result has 0.9 percent of original size [2021-10-15 19:30:22,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 174 treesize of output 126 [2021-10-15 19:30:24,037 INFO L354 Elim1Store]: treesize reduction 48, result has 21.3 percent of original size [2021-10-15 19:30:24,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 106 treesize of output 52 [2021-10-15 19:30:24,083 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 19:30:24,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663777589] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:24,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:30:24,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2021-10-15 19:30:24,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074159710] [2021-10-15 19:30:24,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 19:30:24,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:30:24,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 19:30:24,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=200, Unknown=1, NotChecked=0, Total=240 [2021-10-15 19:30:24,090 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 76 [2021-10-15 19:30:24,091 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 339 flow. Second operand has 16 states, 16 states have (on average 27.8125) internal successors, (445), 16 states have internal predecessors, (445), 0 states have call successors, (0), 0 states 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 19:30:24,091 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:30:24,091 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 76 [2021-10-15 19:30:24,091 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:30:26,383 INFO L129 PetriNetUnfolder]: 17/190 cut-off events. [2021-10-15 19:30:26,383 INFO L130 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2021-10-15 19:30:26,384 INFO L84 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 190 events. 17/190 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 583 event pairs, 0 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 481. Up to 29 conditions per place. [2021-10-15 19:30:26,386 INFO L132 encePairwiseOnDemand]: 65/76 looper letters, 55 selfloop transitions, 36 changer transitions 0/114 dead transitions. [2021-10-15 19:30:26,386 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 114 transitions, 732 flow [2021-10-15 19:30:26,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-15 19:30:26,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-15 19:30:26,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 741 transitions. [2021-10-15 19:30:26,395 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.39 [2021-10-15 19:30:26,395 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 741 transitions. [2021-10-15 19:30:26,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 741 transitions. [2021-10-15 19:30:26,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:30:26,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 741 transitions. [2021-10-15 19:30:26,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 29.64) internal successors, (741), 25 states have internal predecessors, (741), 0 states have call successors, (0), 0 states 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 19:30:26,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 76.0) internal successors, (1976), 26 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states 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 19:30:26,413 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 76.0) internal successors, (1976), 26 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states 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 19:30:26,414 INFO L186 Difference]: Start difference. First operand has 73 places, 61 transitions, 339 flow. Second operand 25 states and 741 transitions. [2021-10-15 19:30:26,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 114 transitions, 732 flow [2021-10-15 19:30:26,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 114 transitions, 706 flow, removed 4 selfloop flow, removed 6 redundant places. [2021-10-15 19:30:26,429 INFO L242 Difference]: Finished difference. Result has 98 places, 84 transitions, 552 flow [2021-10-15 19:30:26,431 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=552, PETRI_PLACES=98, PETRI_TRANSITIONS=84} [2021-10-15 19:30:26,432 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2021-10-15 19:30:26,432 INFO L470 AbstractCegarLoop]: Abstraction has has 98 places, 84 transitions, 552 flow [2021-10-15 19:30:26,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 27.8125) internal successors, (445), 16 states have internal predecessors, (445), 0 states have call successors, (0), 0 states 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 19:30:26,433 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:30:26,433 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:26,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:26,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 19:30:26,649 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:30:26,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:26,650 INFO L82 PathProgramCache]: Analyzing trace with hash -994395513, now seen corresponding path program 1 times [2021-10-15 19:30:26,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:26,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870052641] [2021-10-15 19:30:26,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:26,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:27,294 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 19:30:27,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:27,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870052641] [2021-10-15 19:30:27,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870052641] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:27,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238341087] [2021-10-15 19:30:27,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:27,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:30:27,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:27,298 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:30:27,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:30:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:27,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-15 19:30:27,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:27,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 19:30:27,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:30:27,782 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-15 19:30:27,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-10-15 19:30:27,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:30:27,817 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-15 19:30:27,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 65 [2021-10-15 19:30:27,841 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-10-15 19:30:27,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 82 [2021-10-15 19:30:28,006 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-15 19:30:28,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 1110 treesize of output 670 [2021-10-15 19:30:28,267 INFO L354 Elim1Store]: treesize reduction 448, result has 7.4 percent of original size [2021-10-15 19:30:28,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 573 treesize of output 371 [2021-10-15 19:30:28,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 567 treesize of output 555 [2021-10-15 19:30:28,287 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-15 19:30:28,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 555 treesize of output 537 [2021-10-15 19:30:28,336 INFO L354 Elim1Store]: treesize reduction 166, result has 15.3 percent of original size [2021-10-15 19:30:28,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 202 treesize of output 164 [2021-10-15 19:30:28,353 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-10-15 19:30:28,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 149 [2021-10-15 19:30:29,969 INFO L354 Elim1Store]: treesize reduction 93, result has 11.4 percent of original size [2021-10-15 19:30:29,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 162 treesize of output 87 [2021-10-15 19:30:29,998 INFO L354 Elim1Store]: treesize reduction 82, result has 3.5 percent of original size [2021-10-15 19:30:29,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 44 [2021-10-15 19:30:30,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-15 19:30:30,052 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 19:30:30,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238341087] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:30,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:30:30,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 17 [2021-10-15 19:30:30,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446673987] [2021-10-15 19:30:30,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-15 19:30:30,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:30:30,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-15 19:30:30,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-10-15 19:30:30,057 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 76 [2021-10-15 19:30:30,058 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 84 transitions, 552 flow. Second operand has 17 states, 17 states have (on average 25.823529411764707) internal successors, (439), 17 states have internal predecessors, (439), 0 states have call successors, (0), 0 states 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 19:30:30,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:30:30,058 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 76 [2021-10-15 19:30:30,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:30:32,298 INFO L129 PetriNetUnfolder]: 20/211 cut-off events. [2021-10-15 19:30:32,299 INFO L130 PetriNetUnfolder]: For 328/328 co-relation queries the response was YES. [2021-10-15 19:30:32,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 211 events. 20/211 cut-off events. For 328/328 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 710 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 622. Up to 55 conditions per place. [2021-10-15 19:30:32,318 INFO L132 encePairwiseOnDemand]: 62/76 looper letters, 65 selfloop transitions, 35 changer transitions 0/121 dead transitions. [2021-10-15 19:30:32,318 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 121 transitions, 905 flow [2021-10-15 19:30:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-15 19:30:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-15 19:30:32,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 589 transitions. [2021-10-15 19:30:32,325 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2021-10-15 19:30:32,325 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 589 transitions. [2021-10-15 19:30:32,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 589 transitions. [2021-10-15 19:30:32,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:30:32,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 589 transitions. [2021-10-15 19:30:32,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 28.047619047619047) internal successors, (589), 21 states have internal predecessors, (589), 0 states have call successors, (0), 0 states 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 19:30:32,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 76.0) internal successors, (1672), 22 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states 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 19:30:32,339 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 76.0) internal successors, (1672), 22 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states 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 19:30:32,339 INFO L186 Difference]: Start difference. First operand has 98 places, 84 transitions, 552 flow. Second operand 21 states and 589 transitions. [2021-10-15 19:30:32,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 121 transitions, 905 flow [2021-10-15 19:30:32,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 121 transitions, 825 flow, removed 25 selfloop flow, removed 6 redundant places. [2021-10-15 19:30:32,358 INFO L242 Difference]: Finished difference. Result has 117 places, 96 transitions, 648 flow [2021-10-15 19:30:32,358 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=648, PETRI_PLACES=117, PETRI_TRANSITIONS=96} [2021-10-15 19:30:32,358 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 76 predicate places. [2021-10-15 19:30:32,358 INFO L470 AbstractCegarLoop]: Abstraction has has 117 places, 96 transitions, 648 flow [2021-10-15 19:30:32,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 25.823529411764707) internal successors, (439), 17 states have internal predecessors, (439), 0 states have call successors, (0), 0 states 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 19:30:32,359 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:30:32,359 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:32,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-15 19:30:32,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-15 19:30:32,560 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:30:32,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:32,561 INFO L82 PathProgramCache]: Analyzing trace with hash 120690651, now seen corresponding path program 2 times [2021-10-15 19:30:32,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:32,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525112751] [2021-10-15 19:30:32,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:32,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:30:33,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:33,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525112751] [2021-10-15 19:30:33,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525112751] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:33,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681916920] [2021-10-15 19:30:33,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:30:33,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:30:33,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:33,645 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:30:33,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:30:34,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:30:34,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:30:34,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-15 19:30:34,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:34,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 19:30:34,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:30:34,345 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-15 19:30:34,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-10-15 19:30:34,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:30:34,377 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-10-15 19:30:34,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 78 [2021-10-15 19:30:34,399 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-10-15 19:30:34,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 82 [2021-10-15 19:30:34,545 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-15 19:30:34,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 1110 treesize of output 670 [2021-10-15 19:30:34,839 INFO L354 Elim1Store]: treesize reduction 448, result has 7.4 percent of original size [2021-10-15 19:30:34,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 573 treesize of output 371 [2021-10-15 19:30:34,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 646 treesize of output 638 [2021-10-15 19:30:34,914 INFO L354 Elim1Store]: treesize reduction 230, result has 18.7 percent of original size [2021-10-15 19:30:34,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 219 treesize of output 178 [2021-10-15 19:30:34,932 INFO L354 Elim1Store]: treesize reduction 41, result has 16.3 percent of original size [2021-10-15 19:30:34,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 154 treesize of output 144 [2021-10-15 19:30:36,708 INFO L354 Elim1Store]: treesize reduction 113, result has 9.6 percent of original size [2021-10-15 19:30:36,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 246 treesize of output 116 [2021-10-15 19:30:36,741 INFO L354 Elim1Store]: treesize reduction 114, result has 2.6 percent of original size [2021-10-15 19:30:36,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 74 treesize of output 47 [2021-10-15 19:30:36,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-15 19:30:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:30:36,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681916920] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:36,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:30:36,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 19 [2021-10-15 19:30:36,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75731870] [2021-10-15 19:30:36,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-15 19:30:36,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:30:36,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-15 19:30:36,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-10-15 19:30:36,823 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 76 [2021-10-15 19:30:36,824 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 96 transitions, 648 flow. Second operand has 19 states, 19 states have (on average 26.94736842105263) internal successors, (512), 19 states have internal predecessors, (512), 0 states have call successors, (0), 0 states 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 19:30:36,824 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:30:36,824 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 76 [2021-10-15 19:30:36,824 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:30:42,345 INFO L129 PetriNetUnfolder]: 16/196 cut-off events. [2021-10-15 19:30:42,346 INFO L130 PetriNetUnfolder]: For 312/312 co-relation queries the response was YES. [2021-10-15 19:30:42,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 671 conditions, 196 events. 16/196 cut-off events. For 312/312 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 629 event pairs, 0 based on Foata normal form. 4/195 useless extension candidates. Maximal degree in co-relation 644. Up to 29 conditions per place. [2021-10-15 19:30:42,351 INFO L132 encePairwiseOnDemand]: 64/76 looper letters, 53 selfloop transitions, 46 changer transitions 0/119 dead transitions. [2021-10-15 19:30:42,351 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 119 transitions, 982 flow [2021-10-15 19:30:42,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-15 19:30:42,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-15 19:30:42,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 836 transitions. [2021-10-15 19:30:42,358 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2021-10-15 19:30:42,358 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 836 transitions. [2021-10-15 19:30:42,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 836 transitions. [2021-10-15 19:30:42,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:30:42,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 836 transitions. [2021-10-15 19:30:42,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 27.866666666666667) internal successors, (836), 30 states have internal predecessors, (836), 0 states have call successors, (0), 0 states 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 19:30:42,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 76.0) internal successors, (2356), 31 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states 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 19:30:42,376 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 76.0) internal successors, (2356), 31 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states 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 19:30:42,376 INFO L186 Difference]: Start difference. First operand has 117 places, 96 transitions, 648 flow. Second operand 30 states and 836 transitions. [2021-10-15 19:30:42,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 119 transitions, 982 flow [2021-10-15 19:30:42,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 119 transitions, 919 flow, removed 18 selfloop flow, removed 12 redundant places. [2021-10-15 19:30:42,389 INFO L242 Difference]: Finished difference. Result has 141 places, 99 transitions, 760 flow [2021-10-15 19:30:42,390 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=760, PETRI_PLACES=141, PETRI_TRANSITIONS=99} [2021-10-15 19:30:42,391 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2021-10-15 19:30:42,391 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 99 transitions, 760 flow [2021-10-15 19:30:42,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 26.94736842105263) internal successors, (512), 19 states have internal predecessors, (512), 0 states have call successors, (0), 0 states 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 19:30:42,392 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:30:42,392 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:42,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:42,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-15 19:30:42,617 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:30:42,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:42,618 INFO L82 PathProgramCache]: Analyzing trace with hash -971848358, now seen corresponding path program 1 times [2021-10-15 19:30:42,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:42,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63945316] [2021-10-15 19:30:42,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:42,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:30:43,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:43,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63945316] [2021-10-15 19:30:43,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63945316] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:30:43,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463880347] [2021-10-15 19:30:43,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:43,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:30:43,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:43,044 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:30:43,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:30:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:43,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-15 19:30:43,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:43,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 19:30:43,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 19:30:43,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:30:43,815 INFO L354 Elim1Store]: treesize reduction 146, result has 16.1 percent of original size [2021-10-15 19:30:43,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 74 [2021-10-15 19:30:43,837 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-15 19:30:43,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 68 [2021-10-15 19:30:43,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:30:43,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-15 19:30:44,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:30:44,394 INFO L354 Elim1Store]: treesize reduction 281, result has 11.6 percent of original size [2021-10-15 19:30:44,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 131 treesize of output 92 [2021-10-15 19:30:44,443 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-10-15 19:30:44,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 90 [2021-10-15 19:30:44,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-10-15 19:30:44,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:30:44,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-15 19:30:44,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067734696] [2021-10-15 19:30:44,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:30:44,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:30:44,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:30:44,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:30:44,658 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 76 [2021-10-15 19:30:44,659 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 99 transitions, 760 flow. Second operand has 10 states, 10 states have (on average 25.8) internal successors, (258), 10 states have internal predecessors, (258), 0 states have call successors, (0), 0 states 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 19:30:44,659 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:30:44,659 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 76 [2021-10-15 19:30:44,659 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:30:44,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:30:44,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:44,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:30:44,877 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@64d4212c at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.NestedWordAutomataUtils.getSuccessorState(NestedWordAutomataUtils.java:483) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getOrConstructTransition(DifferencePetriNet.java:452) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getTransitions(DifferencePetriNet.java:433) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.addFullyInstantiatedCandidate(PossibleExtensions.java:171) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:197) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.update(PossibleExtensions.java:137) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.computeUnfolding(PetriNetUnfolder.java:162) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.(PetriNetUnfolder.java:128) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:76) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:65) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePairwiseOnDemand.(DifferencePairwiseOnDemand.java:120) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.enhanceAnddeterminizeInterpolantAutomaton(CegarLoopForPetriNet.java:509) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.refineAbstraction(CegarLoopForPetriNet.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-15 19:30:44,882 INFO L168 Benchmark]: Toolchain (without parser) took 38134.65 ms. Allocated memory was 102.8 MB in the beginning and 218.1 MB in the end (delta: 115.3 MB). Free memory was 68.9 MB in the beginning and 106.5 MB in the end (delta: -37.6 MB). Peak memory consumption was 78.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:30:44,882 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 102.8 MB. Free memory is still 56.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:30:44,883 INFO L168 Benchmark]: CACSL2BoogieTranslator took 713.00 ms. Allocated memory is still 102.8 MB. Free memory was 68.7 MB in the beginning and 70.2 MB in the end (delta: -1.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:30:44,883 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.17 ms. Allocated memory is still 102.8 MB. Free memory was 70.2 MB in the beginning and 68.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:30:44,884 INFO L168 Benchmark]: Boogie Preprocessor took 42.65 ms. Allocated memory is still 102.8 MB. Free memory was 68.2 MB in the beginning and 66.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:30:44,884 INFO L168 Benchmark]: RCFGBuilder took 818.16 ms. Allocated memory is still 102.8 MB. Free memory was 66.4 MB in the beginning and 49.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:30:44,884 INFO L168 Benchmark]: TraceAbstraction took 36484.79 ms. Allocated memory was 102.8 MB in the beginning and 218.1 MB in the end (delta: 115.3 MB). Free memory was 49.3 MB in the beginning and 106.5 MB in the end (delta: -57.2 MB). Peak memory consumption was 60.0 MB. Max. memory is 16.1 GB. [2021-10-15 19:30:44,886 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 102.8 MB. Free memory is still 56.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 713.00 ms. Allocated memory is still 102.8 MB. Free memory was 68.7 MB in the beginning and 70.2 MB in the end (delta: -1.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 67.17 ms. Allocated memory is still 102.8 MB. Free memory was 70.2 MB in the beginning and 68.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.65 ms. Allocated memory is still 102.8 MB. Free memory was 68.2 MB in the beginning and 66.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 818.16 ms. Allocated memory is still 102.8 MB. Free memory was 66.4 MB in the beginning and 49.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 36484.79 ms. Allocated memory was 102.8 MB in the beginning and 218.1 MB in the end (delta: 115.3 MB). Free memory was 49.3 MB in the beginning and 106.5 MB in the end (delta: -57.2 MB). Peak memory consumption was 60.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@64d4212c de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@64d4212c: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-15 19:30:44,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:30:47,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:30:47,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:30:48,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:30:48,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:30:48,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:30:48,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:30:48,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:30:48,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:30:48,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:30:48,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:30:48,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:30:48,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:30:48,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:30:48,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:30:48,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:30:48,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:30:48,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:30:48,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:30:48,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:30:48,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:30:48,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:30:48,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:30:48,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:30:48,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:30:48,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:30:48,128 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:30:48,130 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:30:48,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:30:48,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:30:48,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:30:48,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:30:48,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:30:48,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:30:48,146 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:30:48,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:30:48,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:30:48,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:30:48,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:30:48,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:30:48,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:30:48,154 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-15 19:30:48,216 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:30:48,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:30:48,217 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:30:48,218 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:30:48,221 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:30:48,221 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:30:48,222 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:30:48,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:30:48,222 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:30:48,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:30:48,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:30:48,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:30:48,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:30:48,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:30:48,228 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-15 19:30:48,228 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-15 19:30:48,228 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:30:48,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:30:48,229 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:30:48,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:30:48,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:30:48,230 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:30:48,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:30:48,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:30:48,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:30:48,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:30:48,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:30:48,232 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-15 19:30:48,232 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-15 19:30:48,232 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:30:48,233 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:30:48,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:30:48,234 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:30:48,234 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-15 19:30:48,234 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ee28ec995fb5882fcf61d05ce458a0308013601 [2021-10-15 19:30:48,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:30:48,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:30:48,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:30:48,783 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:30:48,784 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:30:48,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i [2021-10-15 19:30:48,887 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/data/cc5623d11/2a882f3633934b85b2f134c51b4918a5/FLAG5cf5126c8 [2021-10-15 19:30:49,693 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:30:49,694 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i [2021-10-15 19:30:49,712 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/data/cc5623d11/2a882f3633934b85b2f134c51b4918a5/FLAG5cf5126c8 [2021-10-15 19:30:49,924 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/data/cc5623d11/2a882f3633934b85b2f134c51b4918a5 [2021-10-15 19:30:49,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:30:49,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:30:49,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:30:49,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:30:49,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:30:49,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:30:49" (1/1) ... [2021-10-15 19:30:49,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dd9f3ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:49, skipping insertion in model container [2021-10-15 19:30:49,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:30:49" (1/1) ... [2021-10-15 19:30:49,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:30:50,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:30:50,421 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22569,22582] [2021-10-15 19:30:50,427 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22645,22658] [2021-10-15 19:30:50,428 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22715,22728] [2021-10-15 19:30:50,430 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22822,22835] [2021-10-15 19:30:50,438 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22894,22907] [2021-10-15 19:30:50,441 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[23045,23058] [2021-10-15 19:30:50,443 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[23119,23132] [2021-10-15 19:30:50,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:30:50,503 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:30:50,565 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22569,22582] [2021-10-15 19:30:50,567 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22645,22658] [2021-10-15 19:30:50,568 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22715,22728] [2021-10-15 19:30:50,570 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22822,22835] [2021-10-15 19:30:50,572 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[22894,22907] [2021-10-15 19:30:50,574 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[23045,23058] [2021-10-15 19:30:50,576 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_b04bd64a-3e02-4442-be6c-35f95d5ce017/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i[23119,23132] [2021-10-15 19:30:50,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:30:50,647 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:30:50,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:50 WrapperNode [2021-10-15 19:30:50,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:30:50,650 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:30:50,651 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:30:50,652 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:30:50,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:50" (1/1) ... [2021-10-15 19:30:50,707 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:50" (1/1) ... [2021-10-15 19:30:50,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:30:50,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:30:50,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:30:50,771 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:30:50,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:50" (1/1) ... [2021-10-15 19:30:50,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:50" (1/1) ... [2021-10-15 19:30:50,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:50" (1/1) ... [2021-10-15 19:30:50,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:50" (1/1) ... [2021-10-15 19:30:50,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:50" (1/1) ... [2021-10-15 19:30:50,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:50" (1/1) ... [2021-10-15 19:30:50,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:50" (1/1) ... [2021-10-15 19:30:50,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:30:50,878 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:30:50,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:30:50,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:30:50,880 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:50" (1/1) ... [2021-10-15 19:30:50,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:30:50,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:30:50,932 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:30:50,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:30:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-15 19:30:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 19:30:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 19:30:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:30:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 19:30:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:30:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-15 19:30:51,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-15 19:30:51,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:30:51,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:30:51,915 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:30:51,922 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-15 19:30:51,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:30:51 BoogieIcfgContainer [2021-10-15 19:30:51,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:30:51,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:30:51,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:30:51,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:30:51,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:30:49" (1/3) ... [2021-10-15 19:30:51,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56745fb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:30:51, skipping insertion in model container [2021-10-15 19:30:51,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:30:50" (2/3) ... [2021-10-15 19:30:51,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56745fb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:30:51, skipping insertion in model container [2021-10-15 19:30:51,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:30:51" (3/3) ... [2021-10-15 19:30:51,939 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-cnstr_1-1.i [2021-10-15 19:30:51,947 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:30:51,948 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-15 19:30:52,005 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:30:52,015 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 19:30:52,016 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-15 19:30:52,032 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 46 places, 75 transitions, 150 flow [2021-10-15 19:30:52,069 INFO L129 PetriNetUnfolder]: 30/75 cut-off events. [2021-10-15 19:30:52,070 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:30:52,072 INFO L84 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 75 events. 30/75 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 194 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-10-15 19:30:52,073 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 75 transitions, 150 flow [2021-10-15 19:30:52,080 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 65 transitions, 130 flow [2021-10-15 19:30:52,085 INFO L129 PetriNetUnfolder]: 5/17 cut-off events. [2021-10-15 19:30:52,086 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:30:52,086 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:30:52,087 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 19:30:52,088 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:30:52,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:52,095 INFO L82 PathProgramCache]: Analyzing trace with hash 889692517, now seen corresponding path program 1 times [2021-10-15 19:30:52,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:30:52,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975470116] [2021-10-15 19:30:52,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:52,113 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:30:52,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:30:52,117 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:30:52,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-15 19:30:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:52,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:30:52,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:52,350 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 19:30:52,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:30:52,385 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 19:30:52,386 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:30:52,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975470116] [2021-10-15 19:30:52,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975470116] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:30:52,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:30:52,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-15 19:30:52,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34832898] [2021-10-15 19:30:52,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:30:52,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:30:52,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:30:52,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:30:52,427 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 75 [2021-10-15 19:30:52,431 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 65 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:30:52,432 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:30:52,432 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 75 [2021-10-15 19:30:52,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:30:53,125 INFO L129 PetriNetUnfolder]: 5/43 cut-off events. [2021-10-15 19:30:53,149 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:30:53,151 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 43 events. 5/43 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. 12/49 useless extension candidates. Maximal degree in co-relation 4. Up to 11 conditions per place. [2021-10-15 19:30:53,153 INFO L132 encePairwiseOnDemand]: 50/75 looper letters, 16 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2021-10-15 19:30:53,153 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 42 transitions, 122 flow [2021-10-15 19:30:53,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:30:53,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:30:53,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2021-10-15 19:30:53,171 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.51 [2021-10-15 19:30:53,172 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 153 transitions. [2021-10-15 19:30:53,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 153 transitions. [2021-10-15 19:30:53,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:30:53,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 153 transitions. [2021-10-15 19:30:53,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 19:30:53,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 19:30:53,191 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 19:30:53,194 INFO L186 Difference]: Start difference. First operand has 40 places, 65 transitions, 130 flow. Second operand 4 states and 153 transitions. [2021-10-15 19:30:53,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 42 transitions, 122 flow [2021-10-15 19:30:53,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 42 transitions, 122 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:30:53,202 INFO L242 Difference]: Finished difference. Result has 40 places, 41 transitions, 95 flow [2021-10-15 19:30:53,205 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=40, PETRI_TRANSITIONS=41} [2021-10-15 19:30:53,206 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2021-10-15 19:30:53,206 INFO L470 AbstractCegarLoop]: Abstraction has has 40 places, 41 transitions, 95 flow [2021-10-15 19:30:53,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:30:53,207 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:30:53,208 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:53,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:53,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:30:53,424 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 19:30:53,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:53,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1810723981, now seen corresponding path program 1 times [2021-10-15 19:30:53,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:30:53,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102962791] [2021-10-15 19:30:53,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:53,427 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:30:53,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:30:53,431 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:30:53,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-15 19:30:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:53,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:30:53,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:53,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 19:30:53,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-15 19:30:53,733 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 19:30:53,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:30:53,766 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 19:30:53,766 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:30:53,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102962791] [2021-10-15 19:30:53,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102962791] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:30:53,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:30:53,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-15 19:30:53,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834617568] [2021-10-15 19:30:53,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:30:53,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:30:53,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:30:53,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:30:53,773 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 75 [2021-10-15 19:30:53,774 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 41 transitions, 95 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 19:30:53,774 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:30:53,774 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 75 [2021-10-15 19:30:53,774 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:30:54,180 INFO L129 PetriNetUnfolder]: 5/41 cut-off events. [2021-10-15 19:30:54,180 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-15 19:30:54,181 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 41 events. 5/41 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 35. Up to 15 conditions per place. [2021-10-15 19:30:54,182 INFO L132 encePairwiseOnDemand]: 67/75 looper letters, 13 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2021-10-15 19:30:54,182 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 39 transitions, 131 flow [2021-10-15 19:30:54,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:30:54,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:30:54,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2021-10-15 19:30:54,185 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41 [2021-10-15 19:30:54,186 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 123 transitions. [2021-10-15 19:30:54,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 123 transitions. [2021-10-15 19:30:54,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:30:54,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 123 transitions. [2021-10-15 19:30:54,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 30.75) internal successors, (123), 4 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 19:30:54,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 19:30:54,192 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 19:30:54,192 INFO L186 Difference]: Start difference. First operand has 40 places, 41 transitions, 95 flow. Second operand 4 states and 123 transitions. [2021-10-15 19:30:54,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 39 transitions, 131 flow [2021-10-15 19:30:54,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:30:54,201 INFO L242 Difference]: Finished difference. Result has 40 places, 39 transitions, 104 flow [2021-10-15 19:30:54,202 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2021-10-15 19:30:54,202 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2021-10-15 19:30:54,203 INFO L470 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 104 flow [2021-10-15 19:30:54,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 19:30:54,203 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:30:54,203 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:54,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:54,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:30:54,405 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:30:54,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:54,406 INFO L82 PathProgramCache]: Analyzing trace with hash 590587384, now seen corresponding path program 1 times [2021-10-15 19:30:54,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:30:54,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437507794] [2021-10-15 19:30:54,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:54,407 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:30:54,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:30:54,409 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:30:54,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-15 19:30:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:54,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:30:54,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:54,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 19:30:54,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-15 19:30:54,702 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 19:30:54,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:30:54,779 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 19:30:54,780 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:30:54,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437507794] [2021-10-15 19:30:54,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437507794] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:30:54,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:30:54,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-15 19:30:54,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150222111] [2021-10-15 19:30:54,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:30:54,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:30:54,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:30:54,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:30:54,791 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2021-10-15 19:30:54,792 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 104 flow. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 19:30:54,792 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:30:54,792 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2021-10-15 19:30:54,792 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:30:55,605 INFO L129 PetriNetUnfolder]: 8/66 cut-off events. [2021-10-15 19:30:55,605 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-10-15 19:30:55,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 66 events. 8/66 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 95 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 60. Up to 18 conditions per place. [2021-10-15 19:30:55,607 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 25 selfloop transitions, 10 changer transitions 0/53 dead transitions. [2021-10-15 19:30:55,607 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 53 transitions, 216 flow [2021-10-15 19:30:55,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:30:55,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:30:55,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2021-10-15 19:30:55,616 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4088888888888889 [2021-10-15 19:30:55,618 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 184 transitions. [2021-10-15 19:30:55,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 184 transitions. [2021-10-15 19:30:55,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:30:55,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 184 transitions. [2021-10-15 19:30:55,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 30.666666666666668) internal successors, (184), 6 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 19:30:55,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states 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 19:30:55,628 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states 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 19:30:55,628 INFO L186 Difference]: Start difference. First operand has 40 places, 39 transitions, 104 flow. Second operand 6 states and 184 transitions. [2021-10-15 19:30:55,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 53 transitions, 216 flow [2021-10-15 19:30:55,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 53 transitions, 198 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 19:30:55,634 INFO L242 Difference]: Finished difference. Result has 45 places, 45 transitions, 152 flow [2021-10-15 19:30:55,635 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2021-10-15 19:30:55,635 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2021-10-15 19:30:55,636 INFO L470 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 152 flow [2021-10-15 19:30:55,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 19:30:55,636 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:30:55,636 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:30:55,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:30:55,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:30:55,853 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:30:55,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:55,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1507179337, now seen corresponding path program 1 times [2021-10-15 19:30:55,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:30:55,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724947698] [2021-10-15 19:30:55,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:55,855 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:30:55,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:30:55,856 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:30:55,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-15 19:30:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:56,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:30:56,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:30:57,610 INFO L354 Elim1Store]: treesize reduction 163, result has 25.6 percent of original size [2021-10-15 19:30:57,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 141 treesize of output 126 [2021-10-15 19:30:59,376 INFO L354 Elim1Store]: treesize reduction 163, result has 25.6 percent of original size [2021-10-15 19:30:59,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 111 [2021-10-15 19:31:04,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:31:04,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 134 treesize of output 221 [2021-10-15 19:31:04,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:31:04,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 221 treesize of output 284 [2021-10-15 19:31:21,411 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 19:31:21,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:31:21,589 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 19:31:21,589 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:31:21,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724947698] [2021-10-15 19:31:21,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724947698] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:31:21,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:31:21,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-15 19:31:21,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724038888] [2021-10-15 19:31:21,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:31:21,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:31:21,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:31:21,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:31:21,594 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 75 [2021-10-15 19:31:21,595 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 19:31:21,595 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:31:21,595 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 75 [2021-10-15 19:31:21,595 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:31:25,725 INFO L129 PetriNetUnfolder]: 8/64 cut-off events. [2021-10-15 19:31:25,726 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2021-10-15 19:31:25,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 64 events. 8/64 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 64. Up to 25 conditions per place. [2021-10-15 19:31:25,728 INFO L132 encePairwiseOnDemand]: 69/75 looper letters, 18 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2021-10-15 19:31:25,728 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 196 flow [2021-10-15 19:31:25,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:31:25,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:31:25,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2021-10-15 19:31:25,731 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2021-10-15 19:31:25,731 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 160 transitions. [2021-10-15 19:31:25,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 160 transitions. [2021-10-15 19:31:25,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:31:25,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 160 transitions. [2021-10-15 19:31:25,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 19:31:25,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 75.0) internal successors, (450), 6 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 19:31:25,737 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 75.0) internal successors, (450), 6 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 19:31:25,737 INFO L186 Difference]: Start difference. First operand has 45 places, 45 transitions, 152 flow. Second operand 5 states and 160 transitions. [2021-10-15 19:31:25,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 196 flow [2021-10-15 19:31:25,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:31:25,741 INFO L242 Difference]: Finished difference. Result has 46 places, 43 transitions, 154 flow [2021-10-15 19:31:25,742 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2021-10-15 19:31:25,742 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 6 predicate places. [2021-10-15 19:31:25,742 INFO L470 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 154 flow [2021-10-15 19:31:25,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 19:31:25,743 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:31:25,743 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:31:25,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:31:25,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:31:25,957 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:31:25,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:31:25,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2079156959, now seen corresponding path program 1 times [2021-10-15 19:31:25,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:31:25,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595299087] [2021-10-15 19:31:25,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:31:25,959 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:31:25,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:31:25,961 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:31:25,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-15 19:31:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:31:26,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:31:26,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:31:26,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 19:31:26,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-15 19:31:26,217 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 19:31:26,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:31:26,351 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 19:31:26,351 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:31:26,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595299087] [2021-10-15 19:31:26,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595299087] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:31:26,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:31:26,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-15 19:31:26,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095714650] [2021-10-15 19:31:26,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:31:26,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:31:26,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:31:26,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:31:26,355 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 75 [2021-10-15 19:31:26,356 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 154 flow. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 19:31:26,356 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:31:26,356 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 75 [2021-10-15 19:31:26,356 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:31:27,902 INFO L129 PetriNetUnfolder]: 7/63 cut-off events. [2021-10-15 19:31:27,903 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2021-10-15 19:31:27,903 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 63 events. 7/63 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 0 based on Foata normal form. 1/58 useless extension candidates. Maximal degree in co-relation 67. Up to 18 conditions per place. [2021-10-15 19:31:27,904 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 25 selfloop transitions, 9 changer transitions 0/52 dead transitions. [2021-10-15 19:31:27,905 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 52 transitions, 238 flow [2021-10-15 19:31:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:31:27,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:31:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2021-10-15 19:31:27,908 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.42 [2021-10-15 19:31:27,908 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 189 transitions. [2021-10-15 19:31:27,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 189 transitions. [2021-10-15 19:31:27,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:31:27,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 189 transitions. [2021-10-15 19:31:27,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.5) internal successors, (189), 6 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:31:27,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states 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 19:31:27,914 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states 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 19:31:27,914 INFO L186 Difference]: Start difference. First operand has 46 places, 43 transitions, 154 flow. Second operand 6 states and 189 transitions. [2021-10-15 19:31:27,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 52 transitions, 238 flow [2021-10-15 19:31:27,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 52 transitions, 227 flow, removed 1 selfloop flow, removed 3 redundant places. [2021-10-15 19:31:27,919 INFO L242 Difference]: Finished difference. Result has 50 places, 44 transitions, 168 flow [2021-10-15 19:31:27,920 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=168, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2021-10-15 19:31:27,920 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 10 predicate places. [2021-10-15 19:31:27,921 INFO L470 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 168 flow [2021-10-15 19:31:27,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 19:31:27,921 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:31:27,922 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:31:27,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-15 19:31:28,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:31:28,137 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:31:28,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:31:28,138 INFO L82 PathProgramCache]: Analyzing trace with hash -734247455, now seen corresponding path program 1 times [2021-10-15 19:31:28,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:31:28,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290620349] [2021-10-15 19:31:28,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:31:28,139 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:31:28,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:31:28,140 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:31:28,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-15 19:31:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:31:28,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:31:28,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:31:28,349 INFO L354 Elim1Store]: treesize reduction 82, result has 17.2 percent of original size [2021-10-15 19:31:28,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 17 [2021-10-15 19:31:28,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:31:28,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:31:28,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:31:28,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-15 19:31:28,758 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-15 19:31:28,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-10-15 19:31:28,766 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-15 19:31:28,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-10-15 19:31:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:31:28,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:31:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:31:29,038 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:31:29,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290620349] [2021-10-15 19:31:29,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290620349] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-15 19:31:29,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:31:29,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-15 19:31:29,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433471709] [2021-10-15 19:31:29,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:31:29,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:31:29,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:31:29,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:31:29,043 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 75 [2021-10-15 19:31:29,043 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 168 flow. Second operand has 7 states, 7 states have (on average 30.142857142857142) internal successors, (211), 7 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:31:29,044 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:31:29,044 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 75 [2021-10-15 19:31:29,044 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:31:31,131 INFO L129 PetriNetUnfolder]: 5/50 cut-off events. [2021-10-15 19:31:31,132 INFO L130 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2021-10-15 19:31:31,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 50 events. 5/50 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 1/47 useless extension candidates. Maximal degree in co-relation 86. Up to 12 conditions per place. [2021-10-15 19:31:31,133 INFO L132 encePairwiseOnDemand]: 69/75 looper letters, 15 selfloop transitions, 4 changer transitions 7/45 dead transitions. [2021-10-15 19:31:31,133 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 45 transitions, 218 flow [2021-10-15 19:31:31,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:31:31,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:31:31,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2021-10-15 19:31:31,135 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.42444444444444446 [2021-10-15 19:31:31,135 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 191 transitions. [2021-10-15 19:31:31,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 191 transitions. [2021-10-15 19:31:31,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:31:31,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 191 transitions. [2021-10-15 19:31:31,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.833333333333332) internal successors, (191), 6 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 19:31:31,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states 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 19:31:31,138 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states 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 19:31:31,138 INFO L186 Difference]: Start difference. First operand has 50 places, 44 transitions, 168 flow. Second operand 6 states and 191 transitions. [2021-10-15 19:31:31,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 45 transitions, 218 flow [2021-10-15 19:31:31,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 45 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:31:31,143 INFO L242 Difference]: Finished difference. Result has 54 places, 38 transitions, 130 flow [2021-10-15 19:31:31,143 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=130, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2021-10-15 19:31:31,144 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 14 predicate places. [2021-10-15 19:31:31,144 INFO L470 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 130 flow [2021-10-15 19:31:31,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 30.142857142857142) internal successors, (211), 7 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:31:31,144 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:31:31,144 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:31:31,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:31:31,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:31:31,345 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:31:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:31:31,346 INFO L82 PathProgramCache]: Analyzing trace with hash -587248931, now seen corresponding path program 1 times [2021-10-15 19:31:31,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:31:31,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834111855] [2021-10-15 19:31:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:31:31,346 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:31:31,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:31:31,347 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:31:31,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-15 19:31:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:31:31,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-15 19:31:31,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:31:31,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 19:31:31,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 19:31:31,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:31:31,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:31:31,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:31:31,800 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-10-15 19:31:31,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 51 [2021-10-15 19:31:31,831 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-15 19:31:31,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 48 [2021-10-15 19:31:31,967 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:31:31,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834111855] [2021-10-15 19:31:31,968 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-10-15 19:31:31,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2094001082] [2021-10-15 19:31:31,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:31:31,969 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-15 19:31:31,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/cvc4 [2021-10-15 19:31:31,981 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-15 19:31:31,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-15 19:31:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:31:32,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-15 19:31:32,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@1a985a58 [2021-10-15 19:31:32,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755832432] [2021-10-15 19:31:32,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:31:32,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:31:32,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:31:32,299 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:31:32,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 19:31:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:31:32,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-15 19:31:32,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@1a985a58 [2021-10-15 19:31:32,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:31:32,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-15 19:31:32,474 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-10-15 19:31:32,474 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-15 19:31:32,481 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:31:32,483 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:31:32,483 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:31:32,483 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:31:32,483 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:31:32,484 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:31:32,484 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:31:32,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-10-15 19:31:32,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:31:32,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-15 19:31:33,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:31:33,096 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:31:33,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:31:33 BoogieIcfgContainer [2021-10-15 19:31:33,115 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:31:33,116 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:31:33,116 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:31:33,117 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:31:33,125 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:30:51" (3/4) ... [2021-10-15 19:31:33,130 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-15 19:31:33,130 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:31:33,131 INFO L168 Benchmark]: Toolchain (without parser) took 43201.19 ms. Allocated memory was 62.9 MB in the beginning and 123.7 MB in the end (delta: 60.8 MB). Free memory was 42.2 MB in the beginning and 86.1 MB in the end (delta: -43.9 MB). Peak memory consumption was 17.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:31:33,132 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 62.9 MB. Free memory is still 44.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:31:33,132 INFO L168 Benchmark]: CACSL2BoogieTranslator took 717.82 ms. Allocated memory was 62.9 MB in the beginning and 83.9 MB in the end (delta: 21.0 MB). Free memory was 42.0 MB in the beginning and 59.1 MB in the end (delta: -17.1 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:31:33,133 INFO L168 Benchmark]: Boogie Procedure Inliner took 116.61 ms. Allocated memory is still 83.9 MB. Free memory was 59.1 MB in the beginning and 57.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:31:33,133 INFO L168 Benchmark]: Boogie Preprocessor took 109.57 ms. Allocated memory is still 83.9 MB. Free memory was 57.0 MB in the beginning and 54.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:31:33,134 INFO L168 Benchmark]: RCFGBuilder took 1047.27 ms. Allocated memory is still 83.9 MB. Free memory was 54.9 MB in the beginning and 60.0 MB in the end (delta: -5.1 MB). Peak memory consumption was 18.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:31:33,135 INFO L168 Benchmark]: TraceAbstraction took 41187.90 ms. Allocated memory was 83.9 MB in the beginning and 123.7 MB in the end (delta: 39.8 MB). Free memory was 59.6 MB in the beginning and 86.1 MB in the end (delta: -26.5 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:31:33,135 INFO L168 Benchmark]: Witness Printer took 13.87 ms. Allocated memory is still 123.7 MB. Free memory is still 86.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:31:33,138 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 62.9 MB. Free memory is still 44.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 717.82 ms. Allocated memory was 62.9 MB in the beginning and 83.9 MB in the end (delta: 21.0 MB). Free memory was 42.0 MB in the beginning and 59.1 MB in the end (delta: -17.1 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 116.61 ms. Allocated memory is still 83.9 MB. Free memory was 59.1 MB in the beginning and 57.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 109.57 ms. Allocated memory is still 83.9 MB. Free memory was 57.0 MB in the beginning and 54.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1047.27 ms. Allocated memory is still 83.9 MB. Free memory was 54.9 MB in the beginning and 60.0 MB in the end (delta: -5.1 MB). Peak memory consumption was 18.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 41187.90 ms. Allocated memory was 83.9 MB in the beginning and 123.7 MB in the end (delta: 39.8 MB). Free memory was 59.6 MB in the beginning and 86.1 MB in the end (delta: -26.5 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. * Witness Printer took 13.87 ms. Allocated memory is still 123.7 MB. Free memory is still 86.1 MB. There was no memory consumed. 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 - UnprovableResult [Line: 1044]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L1005] struct TSLL* list = malloc(sizeof(struct TSLL)); [L1006] list->next = ((void*)0) [L1007] list->prev = ((void*)0) [L1008] list->colour = BLACK [L1010] struct TSLL* end = list; [L1013] COND TRUE __VERIFIER_nondet_int() [L1016] end->next = malloc(sizeof(struct TSLL)) [L1017] EXPR end->next [L1017] end->next->prev = end [L1018] EXPR end->next [L1018] end = end->next [L1019] end->next = ((void*)0) [L1021] COND FALSE !(__VERIFIER_nondet_int()) [L1027] end->colour = RED [L1028] end->next = malloc(sizeof(struct TSLL)) [L1029] EXPR end->next [L1029] end->next->prev = end [L1030] EXPR end->next [L1030] end = end->next [L1031] end->next = ((void*)0) [L1032] end->colour = BLACK [L1034] EXPR end->colour [L1034] COND FALSE !(!(BLACK == end->colour)) [L1035] EXPR end->next [L1035] COND FALSE !(!(((void*)0) == end->next)) [L1036] COND FALSE !(!(((void*)0) != end)) [L1013] COND FALSE !(__VERIFIER_nondet_int()) [L1039] end = ((void*)0) [L1040] end = list [L1043] COND FALSE !(!(((void*)0) != end)) [L1044] EXPR end->colour [L1044] COND TRUE !(BLACK == end->colour) [L1044] reach_error() - UnprovableResult [Line: 1034]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1036]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1050]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1051]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 46 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 4.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 41094.2ms, OverallIterations: 7, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 9889.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 64.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 47 SDtfs, 72 SDslu, 55 SDs, 0 SdLazy, 230 SolverSat, 45 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 8699.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 119 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1224.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=168occurred in iteration=5, InterpolantAutomatonStates: 31, 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: 95.7ms SsaConstructionTime, 306.5ms SatisfiabilityAnalysisTime, 27180.1ms InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 110 ConstructedInterpolants, 4 QuantifiedInterpolants, 1401 SizeOfPredicates, 26 NumberOfNonLiveVariables, 305 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 12 InterpolantComputations, 10 PerfectInterpolantSequences, 2/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-15 19:31:33,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b04bd64a-3e02-4442-be6c-35f95d5ce017/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...