./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8 --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 b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:14:44,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:14:44,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:14:44,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:14:44,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:14:44,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:14:44,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:14:44,126 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:14:44,128 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:14:44,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:14:44,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:14:44,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:14:44,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:14:44,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:14:44,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:14:44,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:14:44,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:14:44,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:14:44,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:14:44,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:14:44,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:14:44,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:14:44,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:14:44,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:14:44,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:14:44,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:14:44,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:14:44,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:14:44,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:14:44,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:14:44,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:14:44,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:14:44,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:14:44,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:14:44,187 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:14:44,187 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:14:44,188 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:14:44,188 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:14:44,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:14:44,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:14:44,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:14:44,193 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:14:44,220 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:14:44,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:14:44,228 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:14:44,229 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:14:44,229 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:14:44,230 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:14:44,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:14:44,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:14:44,231 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:14:44,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:14:44,231 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:14:44,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:14:44,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:14:44,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:14:44,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:14:44,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:14:44,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:14:44,233 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:14:44,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:14:44,234 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:14:44,235 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:14:44,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:14:44,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:14:44,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:14:44,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:14:44,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:14:44,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:14:44,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:14:44,237 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:14:44,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:14:44,238 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:14:44,238 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:14:44,238 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:14:44,239 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_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa [2022-11-16 11:14:44,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:14:44,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:14:44,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:14:44,645 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:14:44,646 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:14:44,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2022-11-16 11:14:44,735 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/data/c01b776da/7173c368e25247eeae800221d4292441/FLAGe08180706 [2022-11-16 11:14:45,382 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:14:45,383 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2022-11-16 11:14:45,395 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/data/c01b776da/7173c368e25247eeae800221d4292441/FLAGe08180706 [2022-11-16 11:14:45,678 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/data/c01b776da/7173c368e25247eeae800221d4292441 [2022-11-16 11:14:45,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:14:45,683 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:14:45,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:14:45,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:14:45,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:14:45,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:14:45" (1/1) ... [2022-11-16 11:14:45,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62600909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:45, skipping insertion in model container [2022-11-16 11:14:45,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:14:45" (1/1) ... [2022-11-16 11:14:45,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:14:45,739 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:14:46,034 WARN L229 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_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2022-11-16 11:14:46,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:14:46,053 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:14:46,084 WARN L229 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_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2022-11-16 11:14:46,088 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:14:46,106 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:14:46,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:46 WrapperNode [2022-11-16 11:14:46,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:14:46,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:14:46,109 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:14:46,109 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:14:46,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:46" (1/1) ... [2022-11-16 11:14:46,129 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:46" (1/1) ... [2022-11-16 11:14:46,162 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 179 [2022-11-16 11:14:46,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:14:46,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:14:46,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:14:46,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:14:46,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:46" (1/1) ... [2022-11-16 11:14:46,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:46" (1/1) ... [2022-11-16 11:14:46,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:46" (1/1) ... [2022-11-16 11:14:46,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:46" (1/1) ... [2022-11-16 11:14:46,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:46" (1/1) ... [2022-11-16 11:14:46,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:46" (1/1) ... [2022-11-16 11:14:46,218 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:46" (1/1) ... [2022-11-16 11:14:46,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:46" (1/1) ... [2022-11-16 11:14:46,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:14:46,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:14:46,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:14:46,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:14:46,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:46" (1/1) ... [2022-11-16 11:14:46,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:14:46,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:14:46,288 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:14:46,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:14:46,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:14:46,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:14:46,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:14:46,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:14:46,360 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:14:46,360 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:14:46,360 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:14:46,362 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:14:46,362 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 11:14:46,363 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 11:14:46,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:14:46,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 11:14:46,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 11:14:46,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:14:46,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:14:46,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:14:46,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:14:46,367 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:14:46,532 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:14:46,534 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:14:46,996 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:14:47,174 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:14:47,175 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 11:14:47,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:14:47 BoogieIcfgContainer [2022-11-16 11:14:47,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:14:47,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:14:47,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:14:47,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:14:47,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:14:45" (1/3) ... [2022-11-16 11:14:47,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@309011b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:14:47, skipping insertion in model container [2022-11-16 11:14:47,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:46" (2/3) ... [2022-11-16 11:14:47,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@309011b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:14:47, skipping insertion in model container [2022-11-16 11:14:47,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:14:47" (3/3) ... [2022-11-16 11:14:47,198 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2022-11-16 11:14:47,215 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:14:47,231 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:14:47,231 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:14:47,231 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:14:47,335 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 11:14:47,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 154 transitions, 332 flow [2022-11-16 11:14:47,582 INFO L130 PetriNetUnfolder]: 9/151 cut-off events. [2022-11-16 11:14:47,582 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 11:14:47,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 151 events. 9/151 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 86 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2022-11-16 11:14:47,590 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 154 transitions, 332 flow [2022-11-16 11:14:47,595 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 140 transitions, 298 flow [2022-11-16 11:14:47,608 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:14:47,617 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4cf3fce6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:14:47,617 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-16 11:14:47,673 INFO L130 PetriNetUnfolder]: 9/139 cut-off events. [2022-11-16 11:14:47,673 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 11:14:47,674 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:14:47,675 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-11-16 11:14:47,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:14:47,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:47,682 INFO L85 PathProgramCache]: Analyzing trace with hash -17405123, now seen corresponding path program 1 times [2022-11-16 11:14:47,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:14:47,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810816450] [2022-11-16 11:14:47,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:47,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:14:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:48,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:48,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:14:48,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810816450] [2022-11-16 11:14:48,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810816450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:14:48,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:14:48,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:14:48,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877319783] [2022-11-16 11:14:48,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:14:48,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:14:48,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:14:48,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:14:48,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:14:48,191 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 154 [2022-11-16 11:14:48,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 140 transitions, 298 flow. Second operand has 2 states, 2 states have (on average 144.0) internal successors, (288), 2 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:48,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:14:48,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 154 [2022-11-16 11:14:48,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:14:48,386 INFO L130 PetriNetUnfolder]: 18/215 cut-off events. [2022-11-16 11:14:48,387 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-11-16 11:14:48,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 215 events. 18/215 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 460 event pairs, 15 based on Foata normal form. 19/223 useless extension candidates. Maximal degree in co-relation 150. Up to 37 conditions per place. [2022-11-16 11:14:48,394 INFO L137 encePairwiseOnDemand]: 148/154 looper letters, 9 selfloop transitions, 0 changer transitions 3/134 dead transitions. [2022-11-16 11:14:48,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 134 transitions, 304 flow [2022-11-16 11:14:48,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:14:48,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:14:48,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 291 transitions. [2022-11-16 11:14:48,424 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9448051948051948 [2022-11-16 11:14:48,425 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 291 transitions. [2022-11-16 11:14:48,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 291 transitions. [2022-11-16 11:14:48,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:14:48,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 291 transitions. [2022-11-16 11:14:48,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:48,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:48,453 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:48,456 INFO L175 Difference]: Start difference. First operand has 141 places, 140 transitions, 298 flow. Second operand 2 states and 291 transitions. [2022-11-16 11:14:48,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 134 transitions, 304 flow [2022-11-16 11:14:48,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 134 transitions, 292 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-16 11:14:48,469 INFO L231 Difference]: Finished difference. Result has 136 places, 131 transitions, 268 flow [2022-11-16 11:14:48,472 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=268, PETRI_PLACES=136, PETRI_TRANSITIONS=131} [2022-11-16 11:14:48,485 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, -5 predicate places. [2022-11-16 11:14:48,486 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 131 transitions, 268 flow [2022-11-16 11:14:48,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 144.0) internal successors, (288), 2 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:48,486 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:14:48,488 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-11-16 11:14:48,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:14:48,488 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:14:48,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:48,490 INFO L85 PathProgramCache]: Analyzing trace with hash -17693890, now seen corresponding path program 1 times [2022-11-16 11:14:48,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:14:48,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947101376] [2022-11-16 11:14:48,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:48,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:14:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:49,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:14:49,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947101376] [2022-11-16 11:14:49,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947101376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:14:49,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:14:49,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:14:49,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954616500] [2022-11-16 11:14:49,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:14:49,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:14:49,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:14:49,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:14:49,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:14:49,284 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 154 [2022-11-16 11:14:49,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 131 transitions, 268 flow. Second operand has 6 states, 6 states have (on average 127.16666666666667) internal successors, (763), 6 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:49,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:14:49,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 154 [2022-11-16 11:14:49,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:14:49,522 INFO L130 PetriNetUnfolder]: 20/259 cut-off events. [2022-11-16 11:14:49,523 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-16 11:14:49,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 259 events. 20/259 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 609 event pairs, 15 based on Foata normal form. 6/254 useless extension candidates. Maximal degree in co-relation 327. Up to 46 conditions per place. [2022-11-16 11:14:49,529 INFO L137 encePairwiseOnDemand]: 144/154 looper letters, 21 selfloop transitions, 6 changer transitions 4/139 dead transitions. [2022-11-16 11:14:49,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 139 transitions, 349 flow [2022-11-16 11:14:49,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:14:49,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:14:49,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 902 transitions. [2022-11-16 11:14:49,537 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8367346938775511 [2022-11-16 11:14:49,537 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 902 transitions. [2022-11-16 11:14:49,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 902 transitions. [2022-11-16 11:14:49,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:14:49,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 902 transitions. [2022-11-16 11:14:49,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.85714285714286) internal successors, (902), 7 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:49,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 154.0) internal successors, (1232), 8 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:49,550 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 154.0) internal successors, (1232), 8 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:49,550 INFO L175 Difference]: Start difference. First operand has 136 places, 131 transitions, 268 flow. Second operand 7 states and 902 transitions. [2022-11-16 11:14:49,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 139 transitions, 349 flow [2022-11-16 11:14:49,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 139 transitions, 349 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:14:49,560 INFO L231 Difference]: Finished difference. Result has 141 places, 132 transitions, 294 flow [2022-11-16 11:14:49,561 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=294, PETRI_PLACES=141, PETRI_TRANSITIONS=132} [2022-11-16 11:14:49,562 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 0 predicate places. [2022-11-16 11:14:49,563 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 132 transitions, 294 flow [2022-11-16 11:14:49,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 127.16666666666667) internal successors, (763), 6 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:49,564 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:14:49,565 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:14:49,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:14:49,566 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:14:49,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:49,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1623665360, now seen corresponding path program 1 times [2022-11-16 11:14:49,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:14:49,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926699122] [2022-11-16 11:14:49,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:49,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:14:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:50,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:14:50,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926699122] [2022-11-16 11:14:50,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926699122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:14:50,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449605907] [2022-11-16 11:14:50,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:50,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:14:50,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:14:50,114 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:14:50,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:14:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:50,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:14:50,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:14:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:50,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:14:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:51,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449605907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:14:51,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:14:51,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-11-16 11:14:51,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249605791] [2022-11-16 11:14:51,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:14:51,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:14:51,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:14:51,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:14:51,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:14:51,075 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 154 [2022-11-16 11:14:51,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 132 transitions, 294 flow. Second operand has 18 states, 18 states have (on average 124.0) internal successors, (2232), 18 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:51,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:14:51,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 154 [2022-11-16 11:14:51,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:14:51,543 INFO L130 PetriNetUnfolder]: 24/300 cut-off events. [2022-11-16 11:14:51,543 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-11-16 11:14:51,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 300 events. 24/300 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 853 event pairs, 15 based on Foata normal form. 9/299 useless extension candidates. Maximal degree in co-relation 426. Up to 44 conditions per place. [2022-11-16 11:14:51,546 INFO L137 encePairwiseOnDemand]: 141/154 looper letters, 24 selfloop transitions, 11 changer transitions 9/149 dead transitions. [2022-11-16 11:14:51,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 149 transitions, 430 flow [2022-11-16 11:14:51,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:14:51,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-16 11:14:51,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1500 transitions. [2022-11-16 11:14:51,553 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8116883116883117 [2022-11-16 11:14:51,553 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1500 transitions. [2022-11-16 11:14:51,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1500 transitions. [2022-11-16 11:14:51,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:14:51,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1500 transitions. [2022-11-16 11:14:51,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 125.0) internal successors, (1500), 12 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:51,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 154.0) internal successors, (2002), 13 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:51,569 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 154.0) internal successors, (2002), 13 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:51,569 INFO L175 Difference]: Start difference. First operand has 141 places, 132 transitions, 294 flow. Second operand 12 states and 1500 transitions. [2022-11-16 11:14:51,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 149 transitions, 430 flow [2022-11-16 11:14:51,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 149 transitions, 420 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:14:51,577 INFO L231 Difference]: Finished difference. Result has 153 places, 136 transitions, 347 flow [2022-11-16 11:14:51,578 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=347, PETRI_PLACES=153, PETRI_TRANSITIONS=136} [2022-11-16 11:14:51,579 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 12 predicate places. [2022-11-16 11:14:51,579 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 136 transitions, 347 flow [2022-11-16 11:14:51,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 124.0) internal successors, (2232), 18 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:51,581 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:14:51,582 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:14:51,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:14:51,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:14:51,795 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:14:51,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:51,796 INFO L85 PathProgramCache]: Analyzing trace with hash 640989232, now seen corresponding path program 2 times [2022-11-16 11:14:51,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:14:51,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253083978] [2022-11-16 11:14:51,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:51,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:14:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:55,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:14:55,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253083978] [2022-11-16 11:14:55,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253083978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:14:55,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057703572] [2022-11-16 11:14:55,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:14:55,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:14:55,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:14:55,190 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:14:55,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:14:55,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:14:55,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:14:55,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 11:14:55,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:14:56,383 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:14:56,384 INFO L350 Elim1Store]: Elim1 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 51 treesize of output 17 [2022-11-16 11:14:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:14:56,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:14:56,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057703572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:14:56,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:14:56,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [26] total 34 [2022-11-16 11:14:56,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057015581] [2022-11-16 11:14:56,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:14:56,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:14:56,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:14:56,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:14:56,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:14:56,558 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2022-11-16 11:14:56,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 136 transitions, 347 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:56,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:14:56,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2022-11-16 11:14:56,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:14:57,572 INFO L130 PetriNetUnfolder]: 424/1095 cut-off events. [2022-11-16 11:14:57,572 INFO L131 PetriNetUnfolder]: For 887/887 co-relation queries the response was YES. [2022-11-16 11:14:57,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2337 conditions, 1095 events. 424/1095 cut-off events. For 887/887 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6060 event pairs, 105 based on Foata normal form. 35/1079 useless extension candidates. Maximal degree in co-relation 2325. Up to 500 conditions per place. [2022-11-16 11:14:57,584 INFO L137 encePairwiseOnDemand]: 137/154 looper letters, 70 selfloop transitions, 15 changer transitions 36/211 dead transitions. [2022-11-16 11:14:57,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 211 transitions, 802 flow [2022-11-16 11:14:57,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:14:57,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-16 11:14:57,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1400 transitions. [2022-11-16 11:14:57,589 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6993006993006993 [2022-11-16 11:14:57,590 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1400 transitions. [2022-11-16 11:14:57,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1400 transitions. [2022-11-16 11:14:57,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:14:57,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1400 transitions. [2022-11-16 11:14:57,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.6923076923077) internal successors, (1400), 13 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:57,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:57,600 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:57,600 INFO L175 Difference]: Start difference. First operand has 153 places, 136 transitions, 347 flow. Second operand 13 states and 1400 transitions. [2022-11-16 11:14:57,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 211 transitions, 802 flow [2022-11-16 11:14:57,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 211 transitions, 749 flow, removed 22 selfloop flow, removed 6 redundant places. [2022-11-16 11:14:57,609 INFO L231 Difference]: Finished difference. Result has 168 places, 150 transitions, 455 flow [2022-11-16 11:14:57,610 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=455, PETRI_PLACES=168, PETRI_TRANSITIONS=150} [2022-11-16 11:14:57,610 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 27 predicate places. [2022-11-16 11:14:57,611 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 150 transitions, 455 flow [2022-11-16 11:14:57,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:57,612 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:14:57,612 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:14:57,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:14:57,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:14:57,819 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:14:57,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:57,820 INFO L85 PathProgramCache]: Analyzing trace with hash 652597846, now seen corresponding path program 3 times [2022-11-16 11:14:57,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:14:57,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509263045] [2022-11-16 11:14:57,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:57,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:14:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:04,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:04,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509263045] [2022-11-16 11:15:04,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509263045] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:15:04,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543820942] [2022-11-16 11:15:04,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:15:04,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:04,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:15:04,439 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:15:04,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:15:04,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:15:04,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:15:04,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 11:15:04,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:05,591 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:15:05,592 INFO L350 Elim1Store]: Elim1 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 51 treesize of output 17 [2022-11-16 11:15:05,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:15:05,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:15:05,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543820942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:15:05,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:15:05,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [34] total 42 [2022-11-16 11:15:05,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346912693] [2022-11-16 11:15:05,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:15:05,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:15:05,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:05,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:15:05,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1600, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 11:15:05,786 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2022-11-16 11:15:05,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 150 transitions, 455 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:05,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:15:05,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2022-11-16 11:15:05,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:15:06,946 INFO L130 PetriNetUnfolder]: 561/1310 cut-off events. [2022-11-16 11:15:06,946 INFO L131 PetriNetUnfolder]: For 1534/1598 co-relation queries the response was YES. [2022-11-16 11:15:06,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3452 conditions, 1310 events. 561/1310 cut-off events. For 1534/1598 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7152 event pairs, 158 based on Foata normal form. 18/1273 useless extension candidates. Maximal degree in co-relation 3431. Up to 661 conditions per place. [2022-11-16 11:15:06,961 INFO L137 encePairwiseOnDemand]: 138/154 looper letters, 76 selfloop transitions, 22 changer transitions 36/224 dead transitions. [2022-11-16 11:15:06,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 224 transitions, 1017 flow [2022-11-16 11:15:06,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:15:06,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-16 11:15:06,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1395 transitions. [2022-11-16 11:15:06,966 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6968031968031968 [2022-11-16 11:15:06,966 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1395 transitions. [2022-11-16 11:15:06,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1395 transitions. [2022-11-16 11:15:06,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:15:06,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1395 transitions. [2022-11-16 11:15:06,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.3076923076923) internal successors, (1395), 13 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:06,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:06,978 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:06,978 INFO L175 Difference]: Start difference. First operand has 168 places, 150 transitions, 455 flow. Second operand 13 states and 1395 transitions. [2022-11-16 11:15:06,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 224 transitions, 1017 flow [2022-11-16 11:15:06,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 224 transitions, 969 flow, removed 24 selfloop flow, removed 6 redundant places. [2022-11-16 11:15:06,991 INFO L231 Difference]: Finished difference. Result has 179 places, 168 transitions, 639 flow [2022-11-16 11:15:06,991 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=639, PETRI_PLACES=179, PETRI_TRANSITIONS=168} [2022-11-16 11:15:06,996 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 38 predicate places. [2022-11-16 11:15:07,000 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 168 transitions, 639 flow [2022-11-16 11:15:07,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:07,002 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:15:07,002 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:15:07,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:15:07,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:07,210 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:15:07,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:07,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1174125112, now seen corresponding path program 4 times [2022-11-16 11:15:07,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:07,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338981576] [2022-11-16 11:15:07,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:07,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:12,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:12,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338981576] [2022-11-16 11:15:12,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338981576] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:15:12,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386985951] [2022-11-16 11:15:12,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:15:12,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:12,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:15:12,862 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:15:12,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:15:13,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:15:13,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:15:13,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-16 11:15:13,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:15,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:15,028 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 23 [2022-11-16 11:15:15,635 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:15:15,635 INFO L350 Elim1Store]: Elim1 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 51 treesize of output 17 [2022-11-16 11:15:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:15,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:15:17,428 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:15:17,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 126 [2022-11-16 11:15:17,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:15:17,469 INFO L350 Elim1Store]: Elim1 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 54 treesize of output 60 [2022-11-16 11:15:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:20,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386985951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:15:20,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:15:20,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 28, 28] total 82 [2022-11-16 11:15:20,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865709363] [2022-11-16 11:15:20,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:15:20,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-16 11:15:20,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:20,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-16 11:15:20,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=6314, Unknown=2, NotChecked=0, Total=6642 [2022-11-16 11:15:20,913 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-11-16 11:15:20,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 168 transitions, 639 flow. Second operand has 82 states, 82 states have (on average 66.5) internal successors, (5453), 82 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:20,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:15:20,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-11-16 11:15:20,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:15:49,186 INFO L130 PetriNetUnfolder]: 1628/4013 cut-off events. [2022-11-16 11:15:49,186 INFO L131 PetriNetUnfolder]: For 7746/7998 co-relation queries the response was YES. [2022-11-16 11:15:49,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11388 conditions, 4013 events. 1628/4013 cut-off events. For 7746/7998 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 31368 event pairs, 258 based on Foata normal form. 84/3901 useless extension candidates. Maximal degree in co-relation 11361. Up to 580 conditions per place. [2022-11-16 11:15:49,222 INFO L137 encePairwiseOnDemand]: 112/154 looper letters, 273 selfloop transitions, 110 changer transitions 83/523 dead transitions. [2022-11-16 11:15:49,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 523 transitions, 3167 flow [2022-11-16 11:15:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-16 11:15:49,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-11-16 11:15:49,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4774 transitions. [2022-11-16 11:15:49,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45588235294117646 [2022-11-16 11:15:49,237 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4774 transitions. [2022-11-16 11:15:49,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4774 transitions. [2022-11-16 11:15:49,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:15:49,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4774 transitions. [2022-11-16 11:15:49,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 70.20588235294117) internal successors, (4774), 68 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:49,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 154.0) internal successors, (10626), 69 states have internal predecessors, (10626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:49,279 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 154.0) internal successors, (10626), 69 states have internal predecessors, (10626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:49,279 INFO L175 Difference]: Start difference. First operand has 179 places, 168 transitions, 639 flow. Second operand 68 states and 4774 transitions. [2022-11-16 11:15:49,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 523 transitions, 3167 flow [2022-11-16 11:15:49,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 523 transitions, 3023 flow, removed 72 selfloop flow, removed 6 redundant places. [2022-11-16 11:15:49,312 INFO L231 Difference]: Finished difference. Result has 271 places, 241 transitions, 1548 flow [2022-11-16 11:15:49,313 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=1548, PETRI_PLACES=271, PETRI_TRANSITIONS=241} [2022-11-16 11:15:49,313 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 130 predicate places. [2022-11-16 11:15:49,314 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 241 transitions, 1548 flow [2022-11-16 11:15:49,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 66.5) internal successors, (5453), 82 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:49,316 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:15:49,317 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:15:49,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:15:49,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:49,524 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:15:49,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:49,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1696703220, now seen corresponding path program 5 times [2022-11-16 11:15:49,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:49,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443763479] [2022-11-16 11:15:49,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:49,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:15:49,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:49,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443763479] [2022-11-16 11:15:49,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443763479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:15:49,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:15:49,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:15:49,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063356523] [2022-11-16 11:15:49,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:15:49,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:15:49,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:49,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:15:49,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:15:49,718 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 154 [2022-11-16 11:15:49,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 241 transitions, 1548 flow. Second operand has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:49,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:15:49,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 154 [2022-11-16 11:15:49,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:15:50,260 INFO L130 PetriNetUnfolder]: 339/1439 cut-off events. [2022-11-16 11:15:50,260 INFO L131 PetriNetUnfolder]: For 8585/8744 co-relation queries the response was YES. [2022-11-16 11:15:50,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4546 conditions, 1439 events. 339/1439 cut-off events. For 8585/8744 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 10732 event pairs, 36 based on Foata normal form. 79/1368 useless extension candidates. Maximal degree in co-relation 4487. Up to 231 conditions per place. [2022-11-16 11:15:50,279 INFO L137 encePairwiseOnDemand]: 150/154 looper letters, 19 selfloop transitions, 40 changer transitions 1/233 dead transitions. [2022-11-16 11:15:50,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 233 transitions, 1567 flow [2022-11-16 11:15:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:15:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 11:15:50,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 550 transitions. [2022-11-16 11:15:50,282 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8928571428571429 [2022-11-16 11:15:50,283 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 550 transitions. [2022-11-16 11:15:50,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 550 transitions. [2022-11-16 11:15:50,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:15:50,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 550 transitions. [2022-11-16 11:15:50,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:50,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:50,288 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:50,288 INFO L175 Difference]: Start difference. First operand has 271 places, 241 transitions, 1548 flow. Second operand 4 states and 550 transitions. [2022-11-16 11:15:50,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 233 transitions, 1567 flow [2022-11-16 11:15:50,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 233 transitions, 1361 flow, removed 65 selfloop flow, removed 37 redundant places. [2022-11-16 11:15:50,332 INFO L231 Difference]: Finished difference. Result has 220 places, 228 transitions, 1346 flow [2022-11-16 11:15:50,332 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1346, PETRI_PLACES=220, PETRI_TRANSITIONS=228} [2022-11-16 11:15:50,333 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 79 predicate places. [2022-11-16 11:15:50,333 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 228 transitions, 1346 flow [2022-11-16 11:15:50,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:50,334 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:15:50,334 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:15:50,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:15:50,335 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:15:50,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:50,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1625478070, now seen corresponding path program 6 times [2022-11-16 11:15:50,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:50,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895586240] [2022-11-16 11:15:50,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:50,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:55,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:55,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895586240] [2022-11-16 11:15:55,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895586240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:15:55,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599318881] [2022-11-16 11:15:55,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:15:55,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:55,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:15:55,890 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:15:55,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:15:56,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-16 11:15:56,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:15:56,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 11:15:56,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:56,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:15:56,970 INFO L350 Elim1Store]: Elim1 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 51 treesize of output 17 [2022-11-16 11:15:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:15:57,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:15:57,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599318881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:15:57,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:15:57,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [35] total 43 [2022-11-16 11:15:57,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487478829] [2022-11-16 11:15:57,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:15:57,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:15:57,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:57,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:15:57,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1682, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 11:15:57,140 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2022-11-16 11:15:57,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 228 transitions, 1346 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:57,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:15:57,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2022-11-16 11:15:57,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:15:58,601 INFO L130 PetriNetUnfolder]: 770/2322 cut-off events. [2022-11-16 11:15:58,601 INFO L131 PetriNetUnfolder]: For 11423/11649 co-relation queries the response was YES. [2022-11-16 11:15:58,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8167 conditions, 2322 events. 770/2322 cut-off events. For 11423/11649 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 17508 event pairs, 161 based on Foata normal form. 79/2261 useless extension candidates. Maximal degree in co-relation 8124. Up to 952 conditions per place. [2022-11-16 11:15:58,623 INFO L137 encePairwiseOnDemand]: 139/154 looper letters, 120 selfloop transitions, 45 changer transitions 37/301 dead transitions. [2022-11-16 11:15:58,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 301 transitions, 2171 flow [2022-11-16 11:15:58,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:15:58,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-16 11:15:58,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1395 transitions. [2022-11-16 11:15:58,627 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6968031968031968 [2022-11-16 11:15:58,627 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1395 transitions. [2022-11-16 11:15:58,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1395 transitions. [2022-11-16 11:15:58,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:15:58,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1395 transitions. [2022-11-16 11:15:58,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.3076923076923) internal successors, (1395), 13 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:58,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:58,653 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:58,653 INFO L175 Difference]: Start difference. First operand has 220 places, 228 transitions, 1346 flow. Second operand 13 states and 1395 transitions. [2022-11-16 11:15:58,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 301 transitions, 2171 flow [2022-11-16 11:15:58,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 301 transitions, 2109 flow, removed 8 selfloop flow, removed 4 redundant places. [2022-11-16 11:15:58,703 INFO L231 Difference]: Finished difference. Result has 237 places, 243 transitions, 1626 flow [2022-11-16 11:15:58,704 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1626, PETRI_PLACES=237, PETRI_TRANSITIONS=243} [2022-11-16 11:15:58,706 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 96 predicate places. [2022-11-16 11:15:58,707 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 243 transitions, 1626 flow [2022-11-16 11:15:58,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:58,709 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:15:58,709 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:15:58,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:15:58,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:58,915 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:15:58,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:58,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1401390300, now seen corresponding path program 7 times [2022-11-16 11:15:58,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:58,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31538102] [2022-11-16 11:15:58,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:58,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:04,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:16:04,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31538102] [2022-11-16 11:16:04,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31538102] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:16:04,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483832355] [2022-11-16 11:16:04,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:16:04,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:16:04,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:16:04,010 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:16:04,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:16:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:04,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-16 11:16:04,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:04,172 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:16:04,573 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 11:16:04,573 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 11 [2022-11-16 11:16:06,280 INFO L350 Elim1Store]: Elim1 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 33 treesize of output 33 [2022-11-16 11:16:07,136 INFO L321 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2022-11-16 11:16:07,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 23 [2022-11-16 11:16:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:07,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:08,555 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-16 11:16:08,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 105 [2022-11-16 11:16:09,508 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:16:09,509 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 7 [2022-11-16 11:16:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:14,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483832355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:14,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:16:14,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 28, 28] total 83 [2022-11-16 11:16:14,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790835541] [2022-11-16 11:16:14,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:14,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-16 11:16:14,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:16:14,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-16 11:16:14,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=6417, Unknown=1, NotChecked=0, Total=6806 [2022-11-16 11:16:14,228 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-11-16 11:16:14,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 243 transitions, 1626 flow. Second operand has 83 states, 83 states have (on average 66.46987951807229) internal successors, (5517), 83 states have internal predecessors, (5517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:14,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:16:14,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-11-16 11:16:14,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:16:30,636 INFO L130 PetriNetUnfolder]: 890/2784 cut-off events. [2022-11-16 11:16:30,636 INFO L131 PetriNetUnfolder]: For 14088/14304 co-relation queries the response was YES. [2022-11-16 11:16:30,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10227 conditions, 2784 events. 890/2784 cut-off events. For 14088/14304 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 22779 event pairs, 130 based on Foata normal form. 57/2670 useless extension candidates. Maximal degree in co-relation 10176. Up to 348 conditions per place. [2022-11-16 11:16:30,670 INFO L137 encePairwiseOnDemand]: 107/154 looper letters, 218 selfloop transitions, 139 changer transitions 34/448 dead transitions. [2022-11-16 11:16:30,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 448 transitions, 3853 flow [2022-11-16 11:16:30,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-16 11:16:30,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-11-16 11:16:30,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 3881 transitions. [2022-11-16 11:16:30,680 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4500231910946197 [2022-11-16 11:16:30,681 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 3881 transitions. [2022-11-16 11:16:30,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 3881 transitions. [2022-11-16 11:16:30,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:16:30,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 3881 transitions. [2022-11-16 11:16:30,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 69.30357142857143) internal successors, (3881), 56 states have internal predecessors, (3881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:30,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 154.0) internal successors, (8778), 57 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:30,709 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 154.0) internal successors, (8778), 57 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:30,709 INFO L175 Difference]: Start difference. First operand has 237 places, 243 transitions, 1626 flow. Second operand 56 states and 3881 transitions. [2022-11-16 11:16:30,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 448 transitions, 3853 flow [2022-11-16 11:16:30,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 448 transitions, 3728 flow, removed 38 selfloop flow, removed 9 redundant places. [2022-11-16 11:16:30,771 INFO L231 Difference]: Finished difference. Result has 296 places, 313 transitions, 2734 flow [2022-11-16 11:16:30,771 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=2734, PETRI_PLACES=296, PETRI_TRANSITIONS=313} [2022-11-16 11:16:30,772 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 155 predicate places. [2022-11-16 11:16:30,772 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 313 transitions, 2734 flow [2022-11-16 11:16:30,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 66.46987951807229) internal successors, (5517), 83 states have internal predecessors, (5517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:30,775 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:16:30,775 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:30,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:16:30,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 11:16:30,983 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:16:30,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:30,984 INFO L85 PathProgramCache]: Analyzing trace with hash -107419740, now seen corresponding path program 8 times [2022-11-16 11:16:30,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:16:30,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053791860] [2022-11-16 11:16:30,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:30,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:16:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:37,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:16:37,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053791860] [2022-11-16 11:16:37,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053791860] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:16:37,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997821288] [2022-11-16 11:16:37,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:16:37,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:16:37,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:16:37,606 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:16:37,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:16:37,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:16:37,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:16:37,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-16 11:16:37,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:37,796 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:16:38,003 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 11:16:38,005 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 11 [2022-11-16 11:16:38,911 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 34 [2022-11-16 11:16:39,254 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:16:39,254 INFO L350 Elim1Store]: Elim1 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 51 treesize of output 17 [2022-11-16 11:16:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:16:39,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:16:39,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997821288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:16:39,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:16:39,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [35] total 50 [2022-11-16 11:16:39,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758200126] [2022-11-16 11:16:39,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:16:39,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:16:39,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:16:39,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:16:39,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2305, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 11:16:39,461 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 154 [2022-11-16 11:16:39,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 313 transitions, 2734 flow. Second operand has 19 states, 19 states have (on average 82.10526315789474) internal successors, (1560), 19 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:39,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:16:39,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 154 [2022-11-16 11:16:39,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:16:41,976 INFO L130 PetriNetUnfolder]: 975/3039 cut-off events. [2022-11-16 11:16:41,977 INFO L131 PetriNetUnfolder]: For 25062/25339 co-relation queries the response was YES. [2022-11-16 11:16:42,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13656 conditions, 3039 events. 975/3039 cut-off events. For 25062/25339 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 25348 event pairs, 178 based on Foata normal form. 100/2968 useless extension candidates. Maximal degree in co-relation 13592. Up to 1162 conditions per place. [2022-11-16 11:16:42,030 INFO L137 encePairwiseOnDemand]: 132/154 looper letters, 184 selfloop transitions, 59 changer transitions 56/381 dead transitions. [2022-11-16 11:16:42,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 381 transitions, 3926 flow [2022-11-16 11:16:42,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:16:42,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 11:16:42,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1795 transitions. [2022-11-16 11:16:42,034 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5550401978973407 [2022-11-16 11:16:42,034 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1795 transitions. [2022-11-16 11:16:42,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1795 transitions. [2022-11-16 11:16:42,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:16:42,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1795 transitions. [2022-11-16 11:16:42,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 85.47619047619048) internal successors, (1795), 21 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:42,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:42,045 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:42,045 INFO L175 Difference]: Start difference. First operand has 296 places, 313 transitions, 2734 flow. Second operand 21 states and 1795 transitions. [2022-11-16 11:16:42,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 381 transitions, 3926 flow [2022-11-16 11:16:42,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 381 transitions, 3671 flow, removed 93 selfloop flow, removed 34 redundant places. [2022-11-16 11:16:42,164 INFO L231 Difference]: Finished difference. Result has 283 places, 302 transitions, 2572 flow [2022-11-16 11:16:42,166 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2497, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2572, PETRI_PLACES=283, PETRI_TRANSITIONS=302} [2022-11-16 11:16:42,167 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 142 predicate places. [2022-11-16 11:16:42,168 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 302 transitions, 2572 flow [2022-11-16 11:16:42,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 82.10526315789474) internal successors, (1560), 19 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:42,168 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:16:42,169 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:42,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:16:42,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:16:42,378 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:16:42,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:42,378 INFO L85 PathProgramCache]: Analyzing trace with hash 942891982, now seen corresponding path program 9 times [2022-11-16 11:16:42,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:16:42,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28169950] [2022-11-16 11:16:42,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:42,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:16:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:48,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:16:48,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28169950] [2022-11-16 11:16:48,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28169950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:16:48,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466270236] [2022-11-16 11:16:48,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:16:48,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:16:48,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:16:48,980 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:16:48,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:16:49,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:16:49,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:16:49,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 11:16:49,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:49,996 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:16:49,997 INFO L350 Elim1Store]: Elim1 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 51 treesize of output 17 [2022-11-16 11:16:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:16:50,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:16:50,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466270236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:16:50,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:16:50,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [38] total 46 [2022-11-16 11:16:50,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110823259] [2022-11-16 11:16:50,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:16:50,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:16:50,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:16:50,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:16:50,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1933, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 11:16:50,186 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2022-11-16 11:16:50,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 302 transitions, 2572 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:50,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:16:50,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2022-11-16 11:16:50,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:16:51,612 INFO L130 PetriNetUnfolder]: 909/2824 cut-off events. [2022-11-16 11:16:51,612 INFO L131 PetriNetUnfolder]: For 24439/24810 co-relation queries the response was YES. [2022-11-16 11:16:51,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12731 conditions, 2824 events. 909/2824 cut-off events. For 24439/24810 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 23124 event pairs, 169 based on Foata normal form. 141/2780 useless extension candidates. Maximal degree in co-relation 12664. Up to 1062 conditions per place. [2022-11-16 11:16:51,634 INFO L137 encePairwiseOnDemand]: 138/154 looper letters, 170 selfloop transitions, 63 changer transitions 45/378 dead transitions. [2022-11-16 11:16:51,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 378 transitions, 3821 flow [2022-11-16 11:16:51,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:16:51,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-16 11:16:51,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1398 transitions. [2022-11-16 11:16:51,637 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6983016983016983 [2022-11-16 11:16:51,637 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1398 transitions. [2022-11-16 11:16:51,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1398 transitions. [2022-11-16 11:16:51,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:16:51,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1398 transitions. [2022-11-16 11:16:51,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.53846153846153) internal successors, (1398), 13 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:51,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:51,644 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:51,644 INFO L175 Difference]: Start difference. First operand has 283 places, 302 transitions, 2572 flow. Second operand 13 states and 1398 transitions. [2022-11-16 11:16:51,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 378 transitions, 3821 flow [2022-11-16 11:16:51,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 378 transitions, 3652 flow, removed 33 selfloop flow, removed 21 redundant places. [2022-11-16 11:16:51,734 INFO L231 Difference]: Finished difference. Result has 271 places, 307 transitions, 2682 flow [2022-11-16 11:16:51,734 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2430, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2682, PETRI_PLACES=271, PETRI_TRANSITIONS=307} [2022-11-16 11:16:51,735 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 130 predicate places. [2022-11-16 11:16:51,735 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 307 transitions, 2682 flow [2022-11-16 11:16:51,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:51,736 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:16:51,736 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:51,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:16:51,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:16:51,942 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:16:51,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:51,943 INFO L85 PathProgramCache]: Analyzing trace with hash -227094194, now seen corresponding path program 10 times [2022-11-16 11:16:51,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:16:51,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667164882] [2022-11-16 11:16:51,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:51,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:16:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:54,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:16:54,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667164882] [2022-11-16 11:16:54,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667164882] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:16:54,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78176495] [2022-11-16 11:16:54,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:16:54,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:16:54,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:16:54,802 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:16:54,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:16:54,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:16:54,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:16:54,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-16 11:16:54,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:56,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:56,610 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 34 [2022-11-16 11:16:57,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:16:57,072 INFO L350 Elim1Store]: Elim1 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 51 treesize of output 17 [2022-11-16 11:16:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:57,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:58,009 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (+ c_~start~0 1) c_~n~0)) (not (<= 0 c_~start~0)) (let ((.cse8 (* c_~start~0 4))) (let ((.cse3 (+ .cse8 c_~queue~0.offset)) (.cse4 (+ .cse8 c_~queue~0.offset 4))) (and (forall ((v_ArrVal_372 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_372) c_~queue~0.base))) (let ((.cse0 (select .cse2 .cse4)) (.cse1 (select .cse2 .cse3))) (<= (+ .cse0 (* (div .cse1 4294967296) 4294967296)) (+ (* (div .cse0 4294967296) 4294967296) .cse1))))) (forall ((v_ArrVal_372 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_372) c_~queue~0.base))) (let ((.cse5 (select .cse7 .cse4)) (.cse6 (select .cse7 .cse3))) (< (+ (* (div .cse5 4294967296) 4294967296) .cse6) (+ .cse5 (* (div .cse6 4294967296) 4294967296) 1))))))))) is different from false [2022-11-16 11:16:58,443 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:16:58,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 204 [2022-11-16 11:16:58,467 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:16:58,468 INFO L350 Elim1Store]: Elim1 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 135 treesize of output 109 [2022-11-16 11:16:58,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:16:58,490 INFO L350 Elim1Store]: Elim1 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 109 treesize of output 83 [2022-11-16 11:17:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:17:01,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78176495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:17:01,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:17:01,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 75 [2022-11-16 11:17:01,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377816282] [2022-11-16 11:17:01,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:17:01,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-16 11:17:01,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:17:01,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-16 11:17:01,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=5107, Unknown=7, NotChecked=144, Total=5550 [2022-11-16 11:17:01,631 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 154 [2022-11-16 11:17:01,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 307 transitions, 2682 flow. Second operand has 75 states, 75 states have (on average 70.54666666666667) internal successors, (5291), 75 states have internal predecessors, (5291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:01,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:17:01,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 154 [2022-11-16 11:17:01,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:17:15,903 INFO L130 PetriNetUnfolder]: 970/3043 cut-off events. [2022-11-16 11:17:15,903 INFO L131 PetriNetUnfolder]: For 25682/25956 co-relation queries the response was YES. [2022-11-16 11:17:15,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13730 conditions, 3043 events. 970/3043 cut-off events. For 25682/25956 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 25312 event pairs, 201 based on Foata normal form. 102/2978 useless extension candidates. Maximal degree in co-relation 13664. Up to 506 conditions per place. [2022-11-16 11:17:15,933 INFO L137 encePairwiseOnDemand]: 116/154 looper letters, 256 selfloop transitions, 92 changer transitions 107/516 dead transitions. [2022-11-16 11:17:15,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 516 transitions, 5412 flow [2022-11-16 11:17:15,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-16 11:17:15,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-11-16 11:17:15,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 4208 transitions. [2022-11-16 11:17:15,941 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4793802688539531 [2022-11-16 11:17:15,942 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 4208 transitions. [2022-11-16 11:17:15,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 4208 transitions. [2022-11-16 11:17:15,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:17:15,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 4208 transitions. [2022-11-16 11:17:15,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 73.82456140350877) internal successors, (4208), 57 states have internal predecessors, (4208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:15,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 154.0) internal successors, (8932), 58 states have internal predecessors, (8932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:15,964 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 154.0) internal successors, (8932), 58 states have internal predecessors, (8932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:15,964 INFO L175 Difference]: Start difference. First operand has 271 places, 307 transitions, 2682 flow. Second operand 57 states and 4208 transitions. [2022-11-16 11:17:15,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 516 transitions, 5412 flow [2022-11-16 11:17:16,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 516 transitions, 5256 flow, removed 33 selfloop flow, removed 10 redundant places. [2022-11-16 11:17:16,063 INFO L231 Difference]: Finished difference. Result has 329 places, 299 transitions, 2712 flow [2022-11-16 11:17:16,064 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2572, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=2712, PETRI_PLACES=329, PETRI_TRANSITIONS=299} [2022-11-16 11:17:16,065 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 188 predicate places. [2022-11-16 11:17:16,065 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 299 transitions, 2712 flow [2022-11-16 11:17:16,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 70.54666666666667) internal successors, (5291), 75 states have internal predecessors, (5291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:16,066 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:17:16,067 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:17:16,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:17:16,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:17:16,274 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:17:16,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:16,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1842022108, now seen corresponding path program 11 times [2022-11-16 11:17:16,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:17:16,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409362189] [2022-11-16 11:17:16,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:17:16,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:17:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:17:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:17:22,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:17:22,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409362189] [2022-11-16 11:17:22,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409362189] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:17:22,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513372052] [2022-11-16 11:17:22,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:17:22,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:17:22,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:17:22,218 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:17:22,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:17:22,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 11:17:22,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:17:22,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-16 11:17:22,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:17:24,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:17:24,429 INFO L350 Elim1Store]: Elim1 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 45 treesize of output 17 [2022-11-16 11:17:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:17:24,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:17:25,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:17:25,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 76 [2022-11-16 11:17:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:17:28,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513372052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:17:28,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:17:28,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 26, 21] total 74 [2022-11-16 11:17:28,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759360252] [2022-11-16 11:17:28,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:17:28,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-16 11:17:28,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:17:28,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-16 11:17:28,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=4729, Unknown=0, NotChecked=0, Total=5402 [2022-11-16 11:17:28,440 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2022-11-16 11:17:28,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 299 transitions, 2712 flow. Second operand has 74 states, 74 states have (on average 69.6891891891892) internal successors, (5157), 74 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:28,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:17:28,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2022-11-16 11:17:28,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:17:46,233 INFO L130 PetriNetUnfolder]: 1281/4154 cut-off events. [2022-11-16 11:17:46,233 INFO L131 PetriNetUnfolder]: For 38083/38376 co-relation queries the response was YES. [2022-11-16 11:17:46,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19165 conditions, 4154 events. 1281/4154 cut-off events. For 38083/38376 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 37786 event pairs, 317 based on Foata normal form. 88/4037 useless extension candidates. Maximal degree in co-relation 19087. Up to 713 conditions per place. [2022-11-16 11:17:46,282 INFO L137 encePairwiseOnDemand]: 112/154 looper letters, 260 selfloop transitions, 170 changer transitions 87/577 dead transitions. [2022-11-16 11:17:46,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 577 transitions, 6657 flow [2022-11-16 11:17:46,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-16 11:17:46,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-11-16 11:17:46,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 4514 transitions. [2022-11-16 11:17:46,292 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4727691663175534 [2022-11-16 11:17:46,292 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 4514 transitions. [2022-11-16 11:17:46,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 4514 transitions. [2022-11-16 11:17:46,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:17:46,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 4514 transitions. [2022-11-16 11:17:46,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 72.80645161290323) internal successors, (4514), 62 states have internal predecessors, (4514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:46,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 154.0) internal successors, (9702), 63 states have internal predecessors, (9702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:46,318 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 154.0) internal successors, (9702), 63 states have internal predecessors, (9702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:46,318 INFO L175 Difference]: Start difference. First operand has 329 places, 299 transitions, 2712 flow. Second operand 62 states and 4514 transitions. [2022-11-16 11:17:46,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 577 transitions, 6657 flow [2022-11-16 11:17:46,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 577 transitions, 6169 flow, removed 138 selfloop flow, removed 53 redundant places. [2022-11-16 11:17:46,688 INFO L231 Difference]: Finished difference. Result has 343 places, 344 transitions, 3608 flow [2022-11-16 11:17:46,689 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2468, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=3608, PETRI_PLACES=343, PETRI_TRANSITIONS=344} [2022-11-16 11:17:46,690 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 202 predicate places. [2022-11-16 11:17:46,690 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 344 transitions, 3608 flow [2022-11-16 11:17:46,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 69.6891891891892) internal successors, (5157), 74 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:46,692 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:17:46,692 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:17:46,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:17:46,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:17:46,899 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:17:46,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:46,900 INFO L85 PathProgramCache]: Analyzing trace with hash 960441160, now seen corresponding path program 12 times [2022-11-16 11:17:46,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:17:46,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958313247] [2022-11-16 11:17:46,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:17:46,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:17:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:17:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:17:52,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:17:52,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958313247] [2022-11-16 11:17:52,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958313247] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:17:52,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614350741] [2022-11-16 11:17:52,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:17:52,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:17:52,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:17:52,173 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:17:52,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:17:52,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-16 11:17:52,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:17:52,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-16 11:17:52,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:17:52,361 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:17:52,582 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 11:17:52,582 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 11 [2022-11-16 11:17:53,567 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 34 [2022-11-16 11:17:53,867 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:17:53,867 INFO L350 Elim1Store]: Elim1 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 51 treesize of output 17 [2022-11-16 11:17:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:17:54,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:17:54,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614350741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:17:54,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:17:54,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [35] total 50 [2022-11-16 11:17:54,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075843687] [2022-11-16 11:17:54,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:17:54,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:17:54,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:17:54,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:17:54,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2308, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 11:17:54,101 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 154 [2022-11-16 11:17:54,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 344 transitions, 3608 flow. Second operand has 19 states, 19 states have (on average 82.10526315789474) internal successors, (1560), 19 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:54,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:17:54,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 154 [2022-11-16 11:17:54,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:17:57,454 INFO L130 PetriNetUnfolder]: 1356/4431 cut-off events. [2022-11-16 11:17:57,455 INFO L131 PetriNetUnfolder]: For 48396/48690 co-relation queries the response was YES. [2022-11-16 11:17:57,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21224 conditions, 4431 events. 1356/4431 cut-off events. For 48396/48690 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 41318 event pairs, 447 based on Foata normal form. 110/4293 useless extension candidates. Maximal degree in co-relation 21141. Up to 2083 conditions per place. [2022-11-16 11:17:57,492 INFO L137 encePairwiseOnDemand]: 132/154 looper letters, 224 selfloop transitions, 59 changer transitions 51/416 dead transitions. [2022-11-16 11:17:57,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 416 transitions, 5097 flow [2022-11-16 11:17:57,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:17:57,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 11:17:57,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1793 transitions. [2022-11-16 11:17:57,496 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2022-11-16 11:17:57,497 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1793 transitions. [2022-11-16 11:17:57,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1793 transitions. [2022-11-16 11:17:57,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:17:57,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1793 transitions. [2022-11-16 11:17:57,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 85.38095238095238) internal successors, (1793), 21 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:57,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:57,507 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:57,508 INFO L175 Difference]: Start difference. First operand has 343 places, 344 transitions, 3608 flow. Second operand 21 states and 1793 transitions. [2022-11-16 11:17:57,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 416 transitions, 5097 flow [2022-11-16 11:17:57,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 416 transitions, 4761 flow, removed 101 selfloop flow, removed 46 redundant places. [2022-11-16 11:17:57,863 INFO L231 Difference]: Finished difference. Result has 311 places, 346 transitions, 3494 flow [2022-11-16 11:17:57,864 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=3309, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3494, PETRI_PLACES=311, PETRI_TRANSITIONS=346} [2022-11-16 11:17:57,865 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 170 predicate places. [2022-11-16 11:17:57,865 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 346 transitions, 3494 flow [2022-11-16 11:17:57,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 82.10526315789474) internal successors, (1560), 19 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:57,866 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:17:57,867 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:17:57,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:17:58,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:17:58,083 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:17:58,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:58,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1858230200, now seen corresponding path program 13 times [2022-11-16 11:17:58,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:17:58,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961990812] [2022-11-16 11:17:58,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:17:58,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:17:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:18:02,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:18:02,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961990812] [2022-11-16 11:18:02,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961990812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:18:02,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091246999] [2022-11-16 11:18:02,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:18:02,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:18:02,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:18:02,405 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:18:02,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:18:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:02,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-16 11:18:02,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:18:02,558 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:18:02,945 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 11:18:02,945 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 11 [2022-11-16 11:18:04,552 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 22 [2022-11-16 11:18:05,352 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:18:05,352 INFO L350 Elim1Store]: Elim1 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 45 treesize of output 17 [2022-11-16 11:18:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:18:05,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:18:06,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:18:06,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 130 [2022-11-16 11:18:06,762 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:18:06,763 INFO L350 Elim1Store]: Elim1 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 58 treesize of output 64 [2022-11-16 11:18:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:18:10,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091246999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:18:10,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:18:10,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 28, 28] total 82 [2022-11-16 11:18:10,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689025620] [2022-11-16 11:18:10,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:18:10,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-16 11:18:10,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:18:10,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-16 11:18:10,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=6230, Unknown=1, NotChecked=0, Total=6642 [2022-11-16 11:18:10,683 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-11-16 11:18:10,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 346 transitions, 3494 flow. Second operand has 82 states, 82 states have (on average 66.5) internal successors, (5453), 82 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:10,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:18:10,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-11-16 11:18:10,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:18:36,614 INFO L130 PetriNetUnfolder]: 1598/5203 cut-off events. [2022-11-16 11:18:36,614 INFO L131 PetriNetUnfolder]: For 53456/53777 co-relation queries the response was YES. [2022-11-16 11:18:36,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24181 conditions, 5203 events. 1598/5203 cut-off events. For 53456/53777 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 49972 event pairs, 415 based on Foata normal form. 107/5082 useless extension candidates. Maximal degree in co-relation 24106. Up to 999 conditions per place. [2022-11-16 11:18:36,686 INFO L137 encePairwiseOnDemand]: 113/154 looper letters, 291 selfloop transitions, 181 changer transitions 116/645 dead transitions. [2022-11-16 11:18:36,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 645 transitions, 7870 flow [2022-11-16 11:18:36,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-16 11:18:36,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-11-16 11:18:36,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 5004 transitions. [2022-11-16 11:18:36,698 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2022-11-16 11:18:36,698 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 5004 transitions. [2022-11-16 11:18:36,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 5004 transitions. [2022-11-16 11:18:36,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:18:36,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 5004 transitions. [2022-11-16 11:18:36,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 69.5) internal successors, (5004), 72 states have internal predecessors, (5004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:36,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 154.0) internal successors, (11242), 73 states have internal predecessors, (11242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:36,733 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 154.0) internal successors, (11242), 73 states have internal predecessors, (11242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:36,733 INFO L175 Difference]: Start difference. First operand has 311 places, 346 transitions, 3494 flow. Second operand 72 states and 5004 transitions. [2022-11-16 11:18:36,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 645 transitions, 7870 flow [2022-11-16 11:18:36,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 645 transitions, 7632 flow, removed 76 selfloop flow, removed 20 redundant places. [2022-11-16 11:18:36,951 INFO L231 Difference]: Finished difference. Result has 381 places, 384 transitions, 4582 flow [2022-11-16 11:18:36,952 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=3384, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=4582, PETRI_PLACES=381, PETRI_TRANSITIONS=384} [2022-11-16 11:18:36,952 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 240 predicate places. [2022-11-16 11:18:36,952 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 384 transitions, 4582 flow [2022-11-16 11:18:36,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 66.5) internal successors, (5453), 82 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:36,954 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:18:36,954 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:36,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:18:37,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:18:37,163 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:18:37,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:37,163 INFO L85 PathProgramCache]: Analyzing trace with hash -60746055, now seen corresponding path program 1 times [2022-11-16 11:18:37,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:18:37,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549180635] [2022-11-16 11:18:37,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:37,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:18:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:18:37,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:18:37,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549180635] [2022-11-16 11:18:37,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549180635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:18:37,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:18:37,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:18:37,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956876595] [2022-11-16 11:18:37,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:18:37,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:18:37,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:18:37,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:18:37,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:18:37,340 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-11-16 11:18:37,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 384 transitions, 4582 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:37,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:18:37,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-11-16 11:18:37,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:18:39,904 INFO L130 PetriNetUnfolder]: 2605/8227 cut-off events. [2022-11-16 11:18:39,904 INFO L131 PetriNetUnfolder]: For 76354/77663 co-relation queries the response was YES. [2022-11-16 11:18:39,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35878 conditions, 8227 events. 2605/8227 cut-off events. For 76354/77663 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 88411 event pairs, 861 based on Foata normal form. 144/7520 useless extension candidates. Maximal degree in co-relation 35784. Up to 1765 conditions per place. [2022-11-16 11:18:39,990 INFO L137 encePairwiseOnDemand]: 146/154 looper letters, 218 selfloop transitions, 7 changer transitions 0/476 dead transitions. [2022-11-16 11:18:39,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 476 transitions, 6370 flow [2022-11-16 11:18:39,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:18:39,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:18:40,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 690 transitions. [2022-11-16 11:18:40,136 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8961038961038961 [2022-11-16 11:18:40,136 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 690 transitions. [2022-11-16 11:18:40,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 690 transitions. [2022-11-16 11:18:40,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:18:40,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 690 transitions. [2022-11-16 11:18:40,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.0) internal successors, (690), 5 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:40,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:40,139 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:40,139 INFO L175 Difference]: Start difference. First operand has 381 places, 384 transitions, 4582 flow. Second operand 5 states and 690 transitions. [2022-11-16 11:18:40,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 476 transitions, 6370 flow [2022-11-16 11:18:40,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 476 transitions, 5982 flow, removed 120 selfloop flow, removed 51 redundant places. [2022-11-16 11:18:40,502 INFO L231 Difference]: Finished difference. Result has 320 places, 390 transitions, 4289 flow [2022-11-16 11:18:40,502 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4238, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4289, PETRI_PLACES=320, PETRI_TRANSITIONS=390} [2022-11-16 11:18:40,503 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 179 predicate places. [2022-11-16 11:18:40,503 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 390 transitions, 4289 flow [2022-11-16 11:18:40,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:40,503 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:18:40,504 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:40,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 11:18:40,504 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:18:40,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:40,505 INFO L85 PathProgramCache]: Analyzing trace with hash -946552323, now seen corresponding path program 1 times [2022-11-16 11:18:40,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:18:40,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101335742] [2022-11-16 11:18:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:40,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:18:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:18:40,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:18:40,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101335742] [2022-11-16 11:18:40,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101335742] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:18:40,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123258507] [2022-11-16 11:18:40,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:40,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:18:40,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:18:40,662 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:18:40,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:18:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:40,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:18:40,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:18:40,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:18:40,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:18:40,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:18:40,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123258507] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:18:40,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:18:40,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-11-16 11:18:40,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488301865] [2022-11-16 11:18:40,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:18:40,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:18:40,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:18:40,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:18:40,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:18:40,894 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 154 [2022-11-16 11:18:40,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 390 transitions, 4289 flow. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:40,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:18:40,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 154 [2022-11-16 11:18:40,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:18:42,989 INFO L130 PetriNetUnfolder]: 1879/6541 cut-off events. [2022-11-16 11:18:42,990 INFO L131 PetriNetUnfolder]: For 54274/55274 co-relation queries the response was YES. [2022-11-16 11:18:43,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28507 conditions, 6541 events. 1879/6541 cut-off events. For 54274/55274 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 69296 event pairs, 671 based on Foata normal form. 149/6411 useless extension candidates. Maximal degree in co-relation 28426. Up to 1573 conditions per place. [2022-11-16 11:18:43,051 INFO L137 encePairwiseOnDemand]: 149/154 looper letters, 170 selfloop transitions, 8 changer transitions 0/434 dead transitions. [2022-11-16 11:18:43,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 434 transitions, 5292 flow [2022-11-16 11:18:43,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:18:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 11:18:43,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 554 transitions. [2022-11-16 11:18:43,053 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8993506493506493 [2022-11-16 11:18:43,053 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 554 transitions. [2022-11-16 11:18:43,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 554 transitions. [2022-11-16 11:18:43,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:18:43,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 554 transitions. [2022-11-16 11:18:43,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:43,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:43,055 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:43,055 INFO L175 Difference]: Start difference. First operand has 320 places, 390 transitions, 4289 flow. Second operand 4 states and 554 transitions. [2022-11-16 11:18:43,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 434 transitions, 5292 flow [2022-11-16 11:18:43,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 434 transitions, 5282 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-11-16 11:18:43,273 INFO L231 Difference]: Finished difference. Result has 326 places, 395 transitions, 4348 flow [2022-11-16 11:18:43,273 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4279, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4348, PETRI_PLACES=326, PETRI_TRANSITIONS=395} [2022-11-16 11:18:43,274 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 185 predicate places. [2022-11-16 11:18:43,274 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 395 transitions, 4348 flow [2022-11-16 11:18:43,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:43,274 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:18:43,274 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:43,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:18:43,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:18:43,475 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:18:43,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:43,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1654596441, now seen corresponding path program 2 times [2022-11-16 11:18:43,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:18:43,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322004034] [2022-11-16 11:18:43,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:43,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:18:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:18:43,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:18:43,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322004034] [2022-11-16 11:18:43,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322004034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:18:43,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125986664] [2022-11-16 11:18:43,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:18:43,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:18:43,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:18:43,738 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:18:43,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:18:44,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:18:44,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:18:44,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:18:44,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:18:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:18:44,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:18:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:18:44,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125986664] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:18:44,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:18:44,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-11-16 11:18:44,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538214455] [2022-11-16 11:18:44,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:18:44,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:18:44,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:18:44,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:18:44,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:18:44,159 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 154 [2022-11-16 11:18:44,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 395 transitions, 4348 flow. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:44,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:18:44,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 154 [2022-11-16 11:18:44,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:18:46,163 INFO L130 PetriNetUnfolder]: 1877/6373 cut-off events. [2022-11-16 11:18:46,163 INFO L131 PetriNetUnfolder]: For 58929/60235 co-relation queries the response was YES. [2022-11-16 11:18:46,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29973 conditions, 6373 events. 1877/6373 cut-off events. For 58929/60235 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 66959 event pairs, 457 based on Foata normal form. 253/6402 useless extension candidates. Maximal degree in co-relation 29889. Up to 1528 conditions per place. [2022-11-16 11:18:46,226 INFO L137 encePairwiseOnDemand]: 149/154 looper letters, 169 selfloop transitions, 9 changer transitions 0/434 dead transitions. [2022-11-16 11:18:46,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 434 transitions, 5306 flow [2022-11-16 11:18:46,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:18:46,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 11:18:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 554 transitions. [2022-11-16 11:18:46,228 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8993506493506493 [2022-11-16 11:18:46,228 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 554 transitions. [2022-11-16 11:18:46,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 554 transitions. [2022-11-16 11:18:46,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:18:46,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 554 transitions. [2022-11-16 11:18:46,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:46,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:46,230 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:46,230 INFO L175 Difference]: Start difference. First operand has 326 places, 395 transitions, 4348 flow. Second operand 4 states and 554 transitions. [2022-11-16 11:18:46,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 434 transitions, 5306 flow [2022-11-16 11:18:46,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 434 transitions, 5299 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:18:46,454 INFO L231 Difference]: Finished difference. Result has 330 places, 394 transitions, 4342 flow [2022-11-16 11:18:46,455 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4293, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4342, PETRI_PLACES=330, PETRI_TRANSITIONS=394} [2022-11-16 11:18:46,455 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 189 predicate places. [2022-11-16 11:18:46,455 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 394 transitions, 4342 flow [2022-11-16 11:18:46,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:46,456 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:18:46,456 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:46,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:18:46,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:18:46,657 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:18:46,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:46,658 INFO L85 PathProgramCache]: Analyzing trace with hash 357525085, now seen corresponding path program 2 times [2022-11-16 11:18:46,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:18:46,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186299690] [2022-11-16 11:18:46,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:46,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:18:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:18:46,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:18:46,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186299690] [2022-11-16 11:18:46,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186299690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:18:46,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:18:46,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:18:46,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834424839] [2022-11-16 11:18:46,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:18:46,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:18:46,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:18:46,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:18:46,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:18:46,938 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-11-16 11:18:46,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 394 transitions, 4342 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:46,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:18:46,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-11-16 11:18:46,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:18:49,415 INFO L130 PetriNetUnfolder]: 1952/6325 cut-off events. [2022-11-16 11:18:49,415 INFO L131 PetriNetUnfolder]: For 54212/54902 co-relation queries the response was YES. [2022-11-16 11:18:49,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29780 conditions, 6325 events. 1952/6325 cut-off events. For 54212/54902 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 63931 event pairs, 726 based on Foata normal form. 223/6344 useless extension candidates. Maximal degree in co-relation 29693. Up to 1785 conditions per place. [2022-11-16 11:18:49,474 INFO L137 encePairwiseOnDemand]: 147/154 looper letters, 147 selfloop transitions, 8 changer transitions 34/398 dead transitions. [2022-11-16 11:18:49,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 398 transitions, 4674 flow [2022-11-16 11:18:49,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:18:49,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 11:18:49,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 809 transitions. [2022-11-16 11:18:49,476 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8755411255411255 [2022-11-16 11:18:49,476 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 809 transitions. [2022-11-16 11:18:49,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 809 transitions. [2022-11-16 11:18:49,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:18:49,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 809 transitions. [2022-11-16 11:18:49,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 134.83333333333334) internal successors, (809), 6 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:49,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:49,478 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:49,478 INFO L175 Difference]: Start difference. First operand has 330 places, 394 transitions, 4342 flow. Second operand 6 states and 809 transitions. [2022-11-16 11:18:49,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 398 transitions, 4674 flow [2022-11-16 11:18:49,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 398 transitions, 4484 flow, removed 40 selfloop flow, removed 10 redundant places. [2022-11-16 11:18:49,743 INFO L231 Difference]: Finished difference. Result has 325 places, 317 transitions, 2967 flow [2022-11-16 11:18:49,743 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=3265, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2967, PETRI_PLACES=325, PETRI_TRANSITIONS=317} [2022-11-16 11:18:49,744 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 184 predicate places. [2022-11-16 11:18:49,744 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 317 transitions, 2967 flow [2022-11-16 11:18:49,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:49,744 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:18:49,745 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:49,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 11:18:49,745 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:18:49,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:49,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1373627543, now seen corresponding path program 3 times [2022-11-16 11:18:49,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:18:49,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627011460] [2022-11-16 11:18:49,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:49,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:18:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:18:49,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:18:49,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627011460] [2022-11-16 11:18:49,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627011460] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:18:49,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153118663] [2022-11-16 11:18:49,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:18:49,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:18:49,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:18:49,967 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:18:49,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:18:50,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:18:50,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:18:50,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:18:50,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:18:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:18:50,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:18:50,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:18:50,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153118663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:18:50,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:18:50,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-11-16 11:18:50,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459156865] [2022-11-16 11:18:50,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:18:50,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:18:50,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:18:50,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:18:50,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:18:50,490 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-11-16 11:18:50,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 317 transitions, 2967 flow. Second operand has 9 states, 9 states have (on average 129.0) internal successors, (1161), 9 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:50,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:18:50,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-11-16 11:18:50,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:18:52,831 INFO L130 PetriNetUnfolder]: 2314/7137 cut-off events. [2022-11-16 11:18:52,831 INFO L131 PetriNetUnfolder]: For 54220/54985 co-relation queries the response was YES. [2022-11-16 11:18:53,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33415 conditions, 7137 events. 2314/7137 cut-off events. For 54220/54985 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 71920 event pairs, 603 based on Foata normal form. 139/7066 useless extension candidates. Maximal degree in co-relation 33331. Up to 1284 conditions per place. [2022-11-16 11:18:53,055 INFO L137 encePairwiseOnDemand]: 146/154 looper letters, 193 selfloop transitions, 22 changer transitions 0/424 dead transitions. [2022-11-16 11:18:53,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 424 transitions, 4757 flow [2022-11-16 11:18:53,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:18:53,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:18:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1092 transitions. [2022-11-16 11:18:53,058 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8863636363636364 [2022-11-16 11:18:53,058 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1092 transitions. [2022-11-16 11:18:53,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1092 transitions. [2022-11-16 11:18:53,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:18:53,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1092 transitions. [2022-11-16 11:18:53,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 136.5) internal successors, (1092), 8 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:53,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 154.0) internal successors, (1386), 9 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:53,063 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 154.0) internal successors, (1386), 9 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:53,063 INFO L175 Difference]: Start difference. First operand has 325 places, 317 transitions, 2967 flow. Second operand 8 states and 1092 transitions. [2022-11-16 11:18:53,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 424 transitions, 4757 flow [2022-11-16 11:18:53,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 424 transitions, 4550 flow, removed 69 selfloop flow, removed 10 redundant places. [2022-11-16 11:18:53,326 INFO L231 Difference]: Finished difference. Result has 321 places, 330 transitions, 3029 flow [2022-11-16 11:18:53,326 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3029, PETRI_PLACES=321, PETRI_TRANSITIONS=330} [2022-11-16 11:18:53,327 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 180 predicate places. [2022-11-16 11:18:53,327 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 330 transitions, 3029 flow [2022-11-16 11:18:53,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 129.0) internal successors, (1161), 9 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:53,328 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:18:53,328 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:53,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 11:18:53,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:18:53,529 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:18:53,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:53,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1710174519, now seen corresponding path program 4 times [2022-11-16 11:18:53,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:18:53,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717073595] [2022-11-16 11:18:53,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:53,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:18:53,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:18:53,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:18:53,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717073595] [2022-11-16 11:18:53,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717073595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:18:53,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:18:53,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:18:53,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631911570] [2022-11-16 11:18:53,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:18:53,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:18:53,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:18:53,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:18:53,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:18:53,653 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-11-16 11:18:53,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 330 transitions, 3029 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:53,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:18:53,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-11-16 11:18:53,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:18:55,888 INFO L130 PetriNetUnfolder]: 2218/7107 cut-off events. [2022-11-16 11:18:55,888 INFO L131 PetriNetUnfolder]: For 52187/52840 co-relation queries the response was YES. [2022-11-16 11:18:55,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32906 conditions, 7107 events. 2218/7107 cut-off events. For 52187/52840 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 72660 event pairs, 852 based on Foata normal form. 140/7051 useless extension candidates. Maximal degree in co-relation 32823. Up to 2135 conditions per place. [2022-11-16 11:18:55,987 INFO L137 encePairwiseOnDemand]: 147/154 looper letters, 163 selfloop transitions, 16 changer transitions 6/394 dead transitions. [2022-11-16 11:18:55,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 394 transitions, 4265 flow [2022-11-16 11:18:55,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:18:55,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 11:18:55,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 818 transitions. [2022-11-16 11:18:55,990 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8852813852813853 [2022-11-16 11:18:55,990 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 818 transitions. [2022-11-16 11:18:55,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 818 transitions. [2022-11-16 11:18:55,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:18:55,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 818 transitions. [2022-11-16 11:18:55,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 136.33333333333334) internal successors, (818), 6 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:55,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:55,993 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:55,993 INFO L175 Difference]: Start difference. First operand has 321 places, 330 transitions, 3029 flow. Second operand 6 states and 818 transitions. [2022-11-16 11:18:55,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 394 transitions, 4265 flow [2022-11-16 11:18:56,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 394 transitions, 4237 flow, removed 14 selfloop flow, removed 0 redundant places. [2022-11-16 11:18:56,219 INFO L231 Difference]: Finished difference. Result has 329 places, 336 transitions, 3136 flow [2022-11-16 11:18:56,219 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=3009, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3136, PETRI_PLACES=329, PETRI_TRANSITIONS=336} [2022-11-16 11:18:56,219 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 188 predicate places. [2022-11-16 11:18:56,220 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 336 transitions, 3136 flow [2022-11-16 11:18:56,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:56,220 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:18:56,220 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:56,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-16 11:18:56,220 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:18:56,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:56,221 INFO L85 PathProgramCache]: Analyzing trace with hash -745893445, now seen corresponding path program 5 times [2022-11-16 11:18:56,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:18:56,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179770521] [2022-11-16 11:18:56,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:56,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:18:56,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:56,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:18:56,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:18:56,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179770521] [2022-11-16 11:18:56,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179770521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:18:56,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:18:56,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:18:56,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958057906] [2022-11-16 11:18:56,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:18:56,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:18:56,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:18:56,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:18:56,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:18:56,516 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-11-16 11:18:56,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 336 transitions, 3136 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:56,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:18:56,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-11-16 11:18:56,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:18:58,226 INFO L130 PetriNetUnfolder]: 1922/5942 cut-off events. [2022-11-16 11:18:58,226 INFO L131 PetriNetUnfolder]: For 49233/49841 co-relation queries the response was YES. [2022-11-16 11:18:58,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29044 conditions, 5942 events. 1922/5942 cut-off events. For 49233/49841 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 57540 event pairs, 630 based on Foata normal form. 121/5877 useless extension candidates. Maximal degree in co-relation 28957. Up to 1584 conditions per place. [2022-11-16 11:18:58,289 INFO L137 encePairwiseOnDemand]: 147/154 looper letters, 124 selfloop transitions, 14 changer transitions 13/338 dead transitions. [2022-11-16 11:18:58,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 338 transitions, 3385 flow [2022-11-16 11:18:58,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:18:58,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 11:18:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 808 transitions. [2022-11-16 11:18:58,291 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8744588744588745 [2022-11-16 11:18:58,291 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 808 transitions. [2022-11-16 11:18:58,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 808 transitions. [2022-11-16 11:18:58,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:18:58,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 808 transitions. [2022-11-16 11:18:58,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 134.66666666666666) internal successors, (808), 6 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:58,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:58,295 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:58,295 INFO L175 Difference]: Start difference. First operand has 329 places, 336 transitions, 3136 flow. Second operand 6 states and 808 transitions. [2022-11-16 11:18:58,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 338 transitions, 3385 flow [2022-11-16 11:18:58,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 338 transitions, 3284 flow, removed 15 selfloop flow, removed 8 redundant places. [2022-11-16 11:18:58,490 INFO L231 Difference]: Finished difference. Result has 327 places, 288 transitions, 2372 flow [2022-11-16 11:18:58,491 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2451, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2372, PETRI_PLACES=327, PETRI_TRANSITIONS=288} [2022-11-16 11:18:58,491 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 186 predicate places. [2022-11-16 11:18:58,491 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 288 transitions, 2372 flow [2022-11-16 11:18:58,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:58,492 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:18:58,492 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:58,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-16 11:18:58,492 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:18:58,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:58,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1199775258, now seen corresponding path program 14 times [2022-11-16 11:18:58,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:18:58,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677447090] [2022-11-16 11:18:58,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:58,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:18:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:19:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:19:08,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:19:08,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677447090] [2022-11-16 11:19:08,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677447090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:19:08,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283695680] [2022-11-16 11:19:08,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:19:08,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:19:08,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:19:08,844 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:19:08,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:19:09,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:19:09,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:19:09,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-16 11:19:09,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:19:09,148 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:19:09,421 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 11:19:09,422 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 11 [2022-11-16 11:19:10,244 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 23 [2022-11-16 11:19:10,826 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:19:10,827 INFO L350 Elim1Store]: Elim1 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 51 treesize of output 17 [2022-11-16 11:19:11,055 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 11:19:11,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:19:11,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283695680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:19:11,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:19:11,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [39] total 54 [2022-11-16 11:19:11,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720018228] [2022-11-16 11:19:11,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:19:11,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:19:11,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:19:11,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:19:11,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2690, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 11:19:11,061 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 154 [2022-11-16 11:19:11,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 288 transitions, 2372 flow. Second operand has 19 states, 19 states have (on average 82.10526315789474) internal successors, (1560), 19 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:11,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:19:11,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 154 [2022-11-16 11:19:11,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:19:15,003 INFO L130 PetriNetUnfolder]: 1753/6028 cut-off events. [2022-11-16 11:19:15,003 INFO L131 PetriNetUnfolder]: For 49161/49591 co-relation queries the response was YES. [2022-11-16 11:19:15,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27994 conditions, 6028 events. 1753/6028 cut-off events. For 49161/49591 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 61039 event pairs, 725 based on Foata normal form. 119/5993 useless extension candidates. Maximal degree in co-relation 27907. Up to 2322 conditions per place. [2022-11-16 11:19:15,092 INFO L137 encePairwiseOnDemand]: 131/154 looper letters, 134 selfloop transitions, 42 changer transitions 51/347 dead transitions. [2022-11-16 11:19:15,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 347 transitions, 3282 flow [2022-11-16 11:19:15,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:19:15,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 11:19:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1794 transitions. [2022-11-16 11:19:15,096 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5547309833024119 [2022-11-16 11:19:15,096 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1794 transitions. [2022-11-16 11:19:15,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1794 transitions. [2022-11-16 11:19:15,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:19:15,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1794 transitions. [2022-11-16 11:19:15,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 85.42857142857143) internal successors, (1794), 21 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:15,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:15,105 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:15,105 INFO L175 Difference]: Start difference. First operand has 327 places, 288 transitions, 2372 flow. Second operand 21 states and 1794 transitions. [2022-11-16 11:19:15,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 347 transitions, 3282 flow [2022-11-16 11:19:15,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 347 transitions, 3248 flow, removed 7 selfloop flow, removed 6 redundant places. [2022-11-16 11:19:15,317 INFO L231 Difference]: Finished difference. Result has 346 places, 285 transitions, 2420 flow [2022-11-16 11:19:15,318 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2420, PETRI_PLACES=346, PETRI_TRANSITIONS=285} [2022-11-16 11:19:15,318 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 205 predicate places. [2022-11-16 11:19:15,318 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 285 transitions, 2420 flow [2022-11-16 11:19:15,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 82.10526315789474) internal successors, (1560), 19 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:15,319 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:19:15,319 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-11-16 11:19:15,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:19:15,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:19:15,520 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:19:15,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:19:15,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1972859952, now seen corresponding path program 15 times [2022-11-16 11:19:15,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:19:15,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518563557] [2022-11-16 11:19:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:19:15,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:19:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:19:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:19:29,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:19:29,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518563557] [2022-11-16 11:19:29,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518563557] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:19:29,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51906856] [2022-11-16 11:19:29,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:19:29,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:19:29,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:19:29,715 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:19:29,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3b103e-29a6-40d5-afd4-13e59cf8dee5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 11:19:29,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:19:29,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:19:29,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-16 11:19:29,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:19:29,938 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:19:30,223 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 11:19:30,224 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 11 [2022-11-16 11:19:31,511 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 34 [2022-11-16 11:19:31,910 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:19:31,911 INFO L350 Elim1Store]: Elim1 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 51 treesize of output 17 [2022-11-16 11:19:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 11:19:32,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:19:32,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51906856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:19:32,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:19:32,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [40] total 55 [2022-11-16 11:19:32,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020053698] [2022-11-16 11:19:32,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:19:32,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:19:32,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:19:32,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:19:32,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2793, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 11:19:32,206 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 154 [2022-11-16 11:19:32,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 285 transitions, 2420 flow. Second operand has 19 states, 19 states have (on average 82.10526315789474) internal successors, (1560), 19 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:32,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:19:32,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 154 [2022-11-16 11:19:32,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand