./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R --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 ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a --- 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-38b53e6 [2022-11-25 17:31:48,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:31:48,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:31:48,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:31:48,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:31:48,940 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:31:48,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:31:48,947 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:31:48,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:31:48,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:31:48,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:31:48,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:31:48,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:31:48,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:31:48,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:31:48,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:31:48,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:31:48,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:31:48,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:31:48,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:31:48,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:31:48,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:31:48,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:31:48,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:31:48,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:31:48,999 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:31:48,999 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:31:49,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:31:49,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:31:49,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:31:49,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:31:49,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:31:49,006 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:31:49,007 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:31:49,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:31:49,009 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:31:49,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:31:49,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:31:49,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:31:49,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:31:49,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:31:49,014 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:31:49,061 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:31:49,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:31:49,062 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:31:49,063 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:31:49,064 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:31:49,064 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:31:49,065 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:31:49,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:31:49,065 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:31:49,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:31:49,067 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:31:49,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:31:49,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:31:49,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:31:49,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:31:49,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:31:49,069 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:31:49,069 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:31:49,069 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:31:49,069 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:31:49,070 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:31:49,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:31:49,070 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:31:49,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:31:49,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:31:49,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:31:49,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:31:49,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:31:49,072 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:31:49,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:31:49,073 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:31:49,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:31:49,074 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:31:49,074 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:31:49,074 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a [2022-11-25 17:31:49,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:31:49,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:31:49,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:31:49,432 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:31:49,433 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:31:49,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2022-11-25 17:31:52,565 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:31:52,785 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:31:52,786 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2022-11-25 17:31:52,794 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/data/9e488119d/aa148ffe6cec46c4b7875008708a9ff3/FLAG9b79aebac [2022-11-25 17:31:52,808 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/data/9e488119d/aa148ffe6cec46c4b7875008708a9ff3 [2022-11-25 17:31:52,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:31:52,813 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:31:52,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:31:52,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:31:52,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:31:52,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:31:52" (1/1) ... [2022-11-25 17:31:52,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ed7080a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:52, skipping insertion in model container [2022-11-25 17:31:52,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:31:52" (1/1) ... [2022-11-25 17:31:52,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:31:52,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:31:53,013 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:31:53,017 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:31:53,018 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:31:53,018 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:31:53,022 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:31:53,038 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:31:53,038 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:31:53,046 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:31:53,047 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:31:53,048 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:31:53,057 WARN L237 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_4df68a6e-f119-4920-9fae-0d3da187c3ff/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2022-11-25 17:31:53,073 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:31:53,084 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:31:53,098 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:31:53,099 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:31:53,100 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:31:53,100 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:31:53,101 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:31:53,102 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:31:53,102 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:31:53,104 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:31:53,104 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:31:53,105 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:31:53,115 WARN L237 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_4df68a6e-f119-4920-9fae-0d3da187c3ff/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2022-11-25 17:31:53,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:31:53,136 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:31:53,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:53 WrapperNode [2022-11-25 17:31:53,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:31:53,145 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:31:53,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:31:53,145 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:31:53,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:53" (1/1) ... [2022-11-25 17:31:53,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:53" (1/1) ... [2022-11-25 17:31:53,189 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 191 [2022-11-25 17:31:53,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:31:53,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:31:53,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:31:53,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:31:53,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:53" (1/1) ... [2022-11-25 17:31:53,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:53" (1/1) ... [2022-11-25 17:31:53,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:53" (1/1) ... [2022-11-25 17:31:53,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:53" (1/1) ... [2022-11-25 17:31:53,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:53" (1/1) ... [2022-11-25 17:31:53,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:53" (1/1) ... [2022-11-25 17:31:53,222 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:53" (1/1) ... [2022-11-25 17:31:53,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:53" (1/1) ... [2022-11-25 17:31:53,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:31:53,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:31:53,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:31:53,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:31:53,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:53" (1/1) ... [2022-11-25 17:31:53,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:31:53,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:31:53,277 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:31:53,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:31:53,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:31:53,316 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:31:53,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:31:53,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:31:53,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:31:53,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:31:53,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:31:53,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:31:53,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:31:53,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:31:53,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:31:53,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:31:53,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:31:53,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:31:53,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:31:53,321 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:31:53,542 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:31:53,545 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:31:54,061 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:31:54,160 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:31:54,161 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 17:31:54,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:31:54 BoogieIcfgContainer [2022-11-25 17:31:54,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:31:54,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:31:54,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:31:54,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:31:54,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:31:52" (1/3) ... [2022-11-25 17:31:54,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ab3624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:31:54, skipping insertion in model container [2022-11-25 17:31:54,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:53" (2/3) ... [2022-11-25 17:31:54,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ab3624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:31:54, skipping insertion in model container [2022-11-25 17:31:54,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:31:54" (3/3) ... [2022-11-25 17:31:54,174 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2022-11-25 17:31:54,187 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:31:54,198 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:31:54,198 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:31:54,198 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:31:54,288 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:31:54,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 189 transitions, 394 flow [2022-11-25 17:31:54,443 INFO L130 PetriNetUnfolder]: 15/187 cut-off events. [2022-11-25 17:31:54,443 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:31:54,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 187 events. 15/187 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 101 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 152. Up to 2 conditions per place. [2022-11-25 17:31:54,449 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 189 transitions, 394 flow [2022-11-25 17:31:54,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 178 transitions, 368 flow [2022-11-25 17:31:54,458 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:31:54,474 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 178 transitions, 368 flow [2022-11-25 17:31:54,477 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 178 transitions, 368 flow [2022-11-25 17:31:54,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 178 transitions, 368 flow [2022-11-25 17:31:54,521 INFO L130 PetriNetUnfolder]: 15/178 cut-off events. [2022-11-25 17:31:54,522 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:31:54,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 178 events. 15/178 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 99 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 152. Up to 2 conditions per place. [2022-11-25 17:31:54,524 INFO L119 LiptonReduction]: Number of co-enabled transitions 690 [2022-11-25 17:32:01,822 INFO L134 LiptonReduction]: Checked pairs total: 1077 [2022-11-25 17:32:01,822 INFO L136 LiptonReduction]: Total number of compositions: 190 [2022-11-25 17:32:01,853 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:32:01,863 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;@6b5b5a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:32:01,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 17:32:01,875 INFO L130 PetriNetUnfolder]: 5/21 cut-off events. [2022-11-25 17:32:01,879 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:32:01,879 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:01,880 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:01,881 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:32:01,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:01,888 INFO L85 PathProgramCache]: Analyzing trace with hash 2002822666, now seen corresponding path program 1 times [2022-11-25 17:32:01,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:32:01,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225591320] [2022-11-25 17:32:01,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:01,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:32:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:02,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:32:02,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225591320] [2022-11-25 17:32:02,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225591320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:32:02,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:32:02,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:32:02,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197962193] [2022-11-25 17:32:02,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:32:02,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:32:02,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:32:02,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:32:02,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:32:02,710 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 379 [2022-11-25 17:32:02,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 22 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:02,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:02,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 379 [2022-11-25 17:32:02,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:02,801 INFO L130 PetriNetUnfolder]: 71/123 cut-off events. [2022-11-25 17:32:02,801 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-25 17:32:02,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 123 events. 71/123 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 315 event pairs, 34 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 206. Up to 119 conditions per place. [2022-11-25 17:32:02,804 INFO L137 encePairwiseOnDemand]: 376/379 looper letters, 20 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2022-11-25 17:32:02,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 23 transitions, 102 flow [2022-11-25 17:32:02,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:32:02,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:32:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 512 transitions. [2022-11-25 17:32:02,822 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45030782761653476 [2022-11-25 17:32:02,823 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 512 transitions. [2022-11-25 17:32:02,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 512 transitions. [2022-11-25 17:32:02,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:02,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 512 transitions. [2022-11-25 17:32:02,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:02,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 379.0) internal successors, (1516), 4 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:02,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 379.0) internal successors, (1516), 4 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:02,847 INFO L175 Difference]: Start difference. First operand has 24 places, 22 transitions, 56 flow. Second operand 3 states and 512 transitions. [2022-11-25 17:32:02,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 23 transitions, 102 flow [2022-11-25 17:32:02,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 23 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:32:02,852 INFO L231 Difference]: Finished difference. Result has 23 places, 23 transitions, 60 flow [2022-11-25 17:32:02,854 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=23, PETRI_TRANSITIONS=23} [2022-11-25 17:32:02,858 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, -1 predicate places. [2022-11-25 17:32:02,858 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 23 transitions, 60 flow [2022-11-25 17:32:02,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:02,859 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:02,859 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:02,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:32:02,860 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:32:02,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:02,861 INFO L85 PathProgramCache]: Analyzing trace with hash -386016123, now seen corresponding path program 1 times [2022-11-25 17:32:02,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:32:02,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105919586] [2022-11-25 17:32:02,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:02,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:32:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:03,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:32:03,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105919586] [2022-11-25 17:32:03,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105919586] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:32:03,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618960384] [2022-11-25 17:32:03,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:03,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:32:03,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:32:03,155 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:32:03,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:32:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:03,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:32:03,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:03,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:32:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:03,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618960384] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:32:03,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:32:03,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 10 [2022-11-25 17:32:03,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678833039] [2022-11-25 17:32:03,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:32:03,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:32:03,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:32:03,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:32:03,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:32:03,695 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 379 [2022-11-25 17:32:03,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 23 transitions, 60 flow. Second operand has 5 states, 5 states have (on average 156.8) internal successors, (784), 5 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:03,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:03,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 379 [2022-11-25 17:32:03,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:03,932 INFO L130 PetriNetUnfolder]: 134/218 cut-off events. [2022-11-25 17:32:03,933 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:32:03,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 218 events. 134/218 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 702 event pairs, 24 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 437. Up to 82 conditions per place. [2022-11-25 17:32:03,935 INFO L137 encePairwiseOnDemand]: 372/379 looper letters, 29 selfloop transitions, 8 changer transitions 0/38 dead transitions. [2022-11-25 17:32:03,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 38 transitions, 166 flow [2022-11-25 17:32:03,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:32:03,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:32:03,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 962 transitions. [2022-11-25 17:32:03,952 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4230430958663149 [2022-11-25 17:32:03,956 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 962 transitions. [2022-11-25 17:32:03,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 962 transitions. [2022-11-25 17:32:03,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:03,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 962 transitions. [2022-11-25 17:32:03,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 160.33333333333334) internal successors, (962), 6 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:03,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 379.0) internal successors, (2653), 7 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:03,976 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 379.0) internal successors, (2653), 7 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:03,976 INFO L175 Difference]: Start difference. First operand has 23 places, 23 transitions, 60 flow. Second operand 6 states and 962 transitions. [2022-11-25 17:32:03,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 38 transitions, 166 flow [2022-11-25 17:32:03,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 38 transitions, 162 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:32:03,979 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 91 flow [2022-11-25 17:32:03,980 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=91, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2022-11-25 17:32:03,981 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2022-11-25 17:32:03,981 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 91 flow [2022-11-25 17:32:03,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.8) internal successors, (784), 5 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:03,982 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:03,983 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:04,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:04,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:32:04,191 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:32:04,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:04,192 INFO L85 PathProgramCache]: Analyzing trace with hash -2066908186, now seen corresponding path program 1 times [2022-11-25 17:32:04,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:32:04,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46765253] [2022-11-25 17:32:04,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:04,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:32:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:32:04,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:32:04,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46765253] [2022-11-25 17:32:04,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46765253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:32:04,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:32:04,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:32:04,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286881680] [2022-11-25 17:32:04,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:32:04,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:32:04,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:32:04,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:32:04,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:32:04,455 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 379 [2022-11-25 17:32:04,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 164.25) internal successors, (657), 4 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:04,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:04,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 379 [2022-11-25 17:32:04,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:04,664 INFO L130 PetriNetUnfolder]: 198/324 cut-off events. [2022-11-25 17:32:04,664 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-25 17:32:04,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 792 conditions, 324 events. 198/324 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1097 event pairs, 36 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 768. Up to 193 conditions per place. [2022-11-25 17:32:04,676 INFO L137 encePairwiseOnDemand]: 373/379 looper letters, 37 selfloop transitions, 15 changer transitions 0/52 dead transitions. [2022-11-25 17:32:04,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 52 transitions, 282 flow [2022-11-25 17:32:04,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:32:04,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:32:04,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 846 transitions. [2022-11-25 17:32:04,680 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44643799472295514 [2022-11-25 17:32:04,680 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 846 transitions. [2022-11-25 17:32:04,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 846 transitions. [2022-11-25 17:32:04,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:04,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 846 transitions. [2022-11-25 17:32:04,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 169.2) internal successors, (846), 5 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:04,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 379.0) internal successors, (2274), 6 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:04,691 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 379.0) internal successors, (2274), 6 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:04,691 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 91 flow. Second operand 5 states and 846 transitions. [2022-11-25 17:32:04,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 52 transitions, 282 flow [2022-11-25 17:32:04,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 52 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:32:04,698 INFO L231 Difference]: Finished difference. Result has 34 places, 39 transitions, 211 flow [2022-11-25 17:32:04,702 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=34, PETRI_TRANSITIONS=39} [2022-11-25 17:32:04,704 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 10 predicate places. [2022-11-25 17:32:04,704 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 39 transitions, 211 flow [2022-11-25 17:32:04,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.25) internal successors, (657), 4 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:04,706 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:04,706 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:04,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:32:04,708 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:32:04,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:04,715 INFO L85 PathProgramCache]: Analyzing trace with hash 339651268, now seen corresponding path program 2 times [2022-11-25 17:32:04,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:32:04,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506472551] [2022-11-25 17:32:04,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:04,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:32:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:32:04,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:32:04,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506472551] [2022-11-25 17:32:04,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506472551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:32:04,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:32:04,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:32:04,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368894805] [2022-11-25 17:32:04,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:32:04,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:32:04,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:32:04,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:32:04,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:32:04,910 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 379 [2022-11-25 17:32:04,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 39 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:04,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:04,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 379 [2022-11-25 17:32:04,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:05,081 INFO L130 PetriNetUnfolder]: 255/414 cut-off events. [2022-11-25 17:32:05,081 INFO L131 PetriNetUnfolder]: For 640/652 co-relation queries the response was YES. [2022-11-25 17:32:05,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1415 conditions, 414 events. 255/414 cut-off events. For 640/652 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1476 event pairs, 81 based on Foata normal form. 9/411 useless extension candidates. Maximal degree in co-relation 1389. Up to 222 conditions per place. [2022-11-25 17:32:05,086 INFO L137 encePairwiseOnDemand]: 376/379 looper letters, 46 selfloop transitions, 5 changer transitions 2/55 dead transitions. [2022-11-25 17:32:05,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 55 transitions, 399 flow [2022-11-25 17:32:05,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:32:05,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:32:05,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2022-11-25 17:32:05,090 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4731750219876869 [2022-11-25 17:32:05,090 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2022-11-25 17:32:05,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2022-11-25 17:32:05,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:05,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2022-11-25 17:32:05,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:05,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 379.0) internal successors, (1516), 4 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:05,098 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 379.0) internal successors, (1516), 4 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:05,098 INFO L175 Difference]: Start difference. First operand has 34 places, 39 transitions, 211 flow. Second operand 3 states and 538 transitions. [2022-11-25 17:32:05,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 55 transitions, 399 flow [2022-11-25 17:32:05,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 55 transitions, 395 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-11-25 17:32:05,108 INFO L231 Difference]: Finished difference. Result has 37 places, 41 transitions, 237 flow [2022-11-25 17:32:05,109 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=237, PETRI_PLACES=37, PETRI_TRANSITIONS=41} [2022-11-25 17:32:05,111 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 13 predicate places. [2022-11-25 17:32:05,111 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 41 transitions, 237 flow [2022-11-25 17:32:05,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:05,112 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:05,112 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:05,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:32:05,113 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:32:05,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:05,115 INFO L85 PathProgramCache]: Analyzing trace with hash 373219585, now seen corresponding path program 1 times [2022-11-25 17:32:05,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:32:05,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934490945] [2022-11-25 17:32:05,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:05,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:32:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:32:05,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:32:05,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934490945] [2022-11-25 17:32:05,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934490945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:32:05,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758419745] [2022-11-25 17:32:05,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:05,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:32:05,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:32:05,480 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:32:05,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:32:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:05,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:32:05,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:05,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:32:05,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:32:05,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758419745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:32:05,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:32:05,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-11-25 17:32:05,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419577088] [2022-11-25 17:32:05,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:32:05,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:32:05,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:32:05,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:32:05,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:32:05,695 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 379 [2022-11-25 17:32:05,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 41 transitions, 237 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:05,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:05,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 379 [2022-11-25 17:32:05,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:05,828 INFO L130 PetriNetUnfolder]: 241/414 cut-off events. [2022-11-25 17:32:05,828 INFO L131 PetriNetUnfolder]: For 691/706 co-relation queries the response was YES. [2022-11-25 17:32:05,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1477 conditions, 414 events. 241/414 cut-off events. For 691/706 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1594 event pairs, 61 based on Foata normal form. 38/446 useless extension candidates. Maximal degree in co-relation 1448. Up to 302 conditions per place. [2022-11-25 17:32:05,832 INFO L137 encePairwiseOnDemand]: 376/379 looper letters, 44 selfloop transitions, 2 changer transitions 5/53 dead transitions. [2022-11-25 17:32:05,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 53 transitions, 392 flow [2022-11-25 17:32:05,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:32:05,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:32:05,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 534 transitions. [2022-11-25 17:32:05,836 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46965699208443273 [2022-11-25 17:32:05,836 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 534 transitions. [2022-11-25 17:32:05,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 534 transitions. [2022-11-25 17:32:05,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:05,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 534 transitions. [2022-11-25 17:32:05,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:05,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 379.0) internal successors, (1516), 4 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:05,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 379.0) internal successors, (1516), 4 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:05,844 INFO L175 Difference]: Start difference. First operand has 37 places, 41 transitions, 237 flow. Second operand 3 states and 534 transitions. [2022-11-25 17:32:05,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 53 transitions, 392 flow [2022-11-25 17:32:05,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 53 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:32:05,851 INFO L231 Difference]: Finished difference. Result has 39 places, 41 transitions, 242 flow [2022-11-25 17:32:05,851 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=39, PETRI_TRANSITIONS=41} [2022-11-25 17:32:05,854 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 15 predicate places. [2022-11-25 17:32:05,854 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 41 transitions, 242 flow [2022-11-25 17:32:05,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:05,855 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:05,855 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] [2022-11-25 17:32:05,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:06,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:32:06,063 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:32:06,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:06,063 INFO L85 PathProgramCache]: Analyzing trace with hash 254478298, now seen corresponding path program 1 times [2022-11-25 17:32:06,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:32:06,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874874995] [2022-11-25 17:32:06,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:06,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:32:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:32:06,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:32:06,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874874995] [2022-11-25 17:32:06,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874874995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:32:06,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:32:06,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:32:06,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654944870] [2022-11-25 17:32:06,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:32:06,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:32:06,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:32:06,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:32:06,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:32:06,310 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 379 [2022-11-25 17:32:06,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 41 transitions, 242 flow. Second operand has 4 states, 4 states have (on average 165.75) internal successors, (663), 4 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:06,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:06,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 379 [2022-11-25 17:32:06,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:06,471 INFO L130 PetriNetUnfolder]: 291/523 cut-off events. [2022-11-25 17:32:06,472 INFO L131 PetriNetUnfolder]: For 1051/1065 co-relation queries the response was YES. [2022-11-25 17:32:06,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1925 conditions, 523 events. 291/523 cut-off events. For 1051/1065 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2205 event pairs, 169 based on Foata normal form. 25/535 useless extension candidates. Maximal degree in co-relation 1501. Up to 407 conditions per place. [2022-11-25 17:32:06,476 INFO L137 encePairwiseOnDemand]: 374/379 looper letters, 38 selfloop transitions, 2 changer transitions 20/62 dead transitions. [2022-11-25 17:32:06,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 62 transitions, 468 flow [2022-11-25 17:32:06,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:32:06,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:32:06,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 843 transitions. [2022-11-25 17:32:06,479 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44485488126649075 [2022-11-25 17:32:06,479 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 843 transitions. [2022-11-25 17:32:06,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 843 transitions. [2022-11-25 17:32:06,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:06,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 843 transitions. [2022-11-25 17:32:06,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.6) internal successors, (843), 5 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:06,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 379.0) internal successors, (2274), 6 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:06,486 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 379.0) internal successors, (2274), 6 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:06,486 INFO L175 Difference]: Start difference. First operand has 39 places, 41 transitions, 242 flow. Second operand 5 states and 843 transitions. [2022-11-25 17:32:06,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 62 transitions, 468 flow [2022-11-25 17:32:06,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 62 transitions, 466 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:32:06,491 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 256 flow [2022-11-25 17:32:06,492 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=256, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2022-11-25 17:32:06,492 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 21 predicate places. [2022-11-25 17:32:06,492 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 256 flow [2022-11-25 17:32:06,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.75) internal successors, (663), 4 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:06,493 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:06,493 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] [2022-11-25 17:32:06,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:32:06,494 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:32:06,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:06,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1833596770, now seen corresponding path program 1 times [2022-11-25 17:32:06,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:32:06,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508618924] [2022-11-25 17:32:06,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:06,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:32:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:08,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:32:08,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508618924] [2022-11-25 17:32:08,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508618924] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:32:08,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134413267] [2022-11-25 17:32:08,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:08,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:32:08,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:32:08,683 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:32:08,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:32:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:08,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-25 17:32:08,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:08,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:32:08,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:32:08,910 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:32:08,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-25 17:32:08,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:32:09,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:32:09,092 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-25 17:32:09,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:32:09,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2022-11-25 17:32:09,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:32:09,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:32:09,742 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 0 case distinctions, treesize of input 42 treesize of output 10 [2022-11-25 17:32:09,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:32:09,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:32:12,844 WARN L837 $PredicateComparison]: unable to prove that (or (not (< c_~end~0 c_~n~0)) (let ((.cse3 (+ (* c_~end~0 4) c_~queue~0.offset))) (and (forall ((~A~0.offset Int) (v_ArrVal_180 (Array Int Int)) (~i~0 Int) (v_ArrVal_179 (Array Int Int)) (v_ArrVal_178 (Array Int Int))) (let ((.cse1 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_ArrVal_178) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_179))) (let ((.cse4 (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180))) (let ((.cse0 (select .cse4 c_~queue~0.base)) (.cse2 (+ (* ~i~0 4) ~A~0.offset))) (or (< (select .cse0 (+ (* c_~start~0 4) c_~queue~0.offset)) (+ (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2) 1)) (not (= (select .cse0 .cse3) (select (select .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2)))))))) (or (not (= (mod c_~ok~0 256) 0)) (forall ((~A~0.offset Int) (v_ArrVal_180 (Array Int Int)) (~i~0 Int) (v_ArrVal_179 (Array Int Int)) (v_ArrVal_178 (Array Int Int))) (not (let ((.cse5 (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_ArrVal_178) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_179) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180))) (= (select (select .cse5 c_~queue~0.base) .cse3) (select (select .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* ~i~0 4) ~A~0.offset))))))))) (not (<= 0 c_~end~0))) is different from false [2022-11-25 17:32:13,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:32:13,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 87 [2022-11-25 17:32:13,120 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:32:13,121 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 2532 treesize of output 2448 [2022-11-25 17:32:13,177 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:32:13,178 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 2436 treesize of output 2216 [2022-11-25 17:32:13,238 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:32:13,239 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 2172 treesize of output 1736 [2022-11-25 17:32:13,301 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:32:13,302 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 1692 treesize of output 1400 [2022-11-25 17:32:19,106 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:32:19,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 51 [2022-11-25 17:32:19,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:19,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1670 treesize of output 1606 [2022-11-25 17:32:19,154 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:32:19,155 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 1606 treesize of output 1335 [2022-11-25 17:32:19,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:32:19,183 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 1318 treesize of output 1095 [2022-11-25 17:32:19,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1078 treesize of output 886 [2022-11-25 17:32:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-25 17:32:19,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134413267] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:32:19,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:32:19,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 29 [2022-11-25 17:32:19,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816075479] [2022-11-25 17:32:19,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:32:19,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 17:32:19,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:32:19,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 17:32:19,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=710, Unknown=5, NotChecked=56, Total=930 [2022-11-25 17:32:20,009 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 379 [2022-11-25 17:32:20,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 256 flow. Second operand has 31 states, 31 states have (on average 95.03225806451613) internal successors, (2946), 31 states have internal predecessors, (2946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:20,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:20,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 379 [2022-11-25 17:32:20,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:20,963 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse16 (* c_~end~0 4)) (.cse17 (* c_~start~0 4))) (let ((.cse3 (+ .cse17 c_~queue~0.offset)) (.cse6 (+ .cse16 c_~queue~0.offset)) (.cse0 (not (< c_~end~0 c_~n~0))) (.cse1 (not (<= 0 c_~end~0))) (.cse8 (not (= (mod c_~ok~0 256) 0)))) (and (or .cse0 .cse1 (and (forall ((~A~0.offset Int) (v_ArrVal_180 (Array Int Int)) (~i~0 Int) (v_ArrVal_179 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_179))) (let ((.cse7 (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180))) (let ((.cse2 (select .cse7 c_~queue~0.base)) (.cse5 (+ (* ~i~0 4) ~A~0.offset))) (or (< (select .cse2 .cse3) (+ (select (select .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse5) 1)) (not (= (select .cse2 .cse6) (select (select .cse7 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse5)))))))) (or .cse8 (forall ((~A~0.offset Int) (v_ArrVal_180 (Array Int Int)) (~i~0 Int) (v_ArrVal_179 (Array Int Int))) (not (let ((.cse9 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_179) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180))) (= (select (select .cse9 c_~queue~0.base) .cse6) (select (select .cse9 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* ~i~0 4) ~A~0.offset))))))))) (= c_~ok~0 1) (or .cse0 (and (forall ((~A~0.offset Int) (v_ArrVal_180 (Array Int Int)) (~i~0 Int) (v_ArrVal_179 (Array Int Int)) (v_ArrVal_178 (Array Int Int))) (let ((.cse11 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_ArrVal_178) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_179))) (let ((.cse13 (store .cse11 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180))) (let ((.cse10 (select .cse13 c_~queue~0.base)) (.cse12 (+ (* ~i~0 4) ~A~0.offset))) (or (< (select .cse10 .cse3) (+ (select (select .cse11 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse12) 1)) (not (= (select .cse10 .cse6) (select (select .cse13 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse12)))))))) (or .cse8 (forall ((~A~0.offset Int) (v_ArrVal_180 (Array Int Int)) (~i~0 Int) (v_ArrVal_179 (Array Int Int)) (v_ArrVal_178 (Array Int Int))) (not (let ((.cse14 (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_ArrVal_178) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_179) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180))) (= (select (select .cse14 c_~queue~0.base) .cse6) (select (select .cse14 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* ~i~0 4) ~A~0.offset)))))))) .cse1) (or .cse0 (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse1 (let ((.cse15 (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_109| Int)) (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_109|) 0))))) (and (or .cse8 .cse15) (or (= .cse16 .cse17) .cse15) (not (= (select |c_#valid| |c_ULTIMATE.start_main_~#t2~0#1.base|) 0)))))))) is different from false [2022-11-25 17:32:22,409 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse8 (+ (* c_~start~0 4) c_~queue~0.offset)) (.cse9 (+ c_~v_old~0 1)) (.cse5 (not (= (mod c_~ok~0 256) 0))) (.cse3 (+ (* c_~end~0 4) c_~queue~0.offset)) (.cse0 (not (< c_~end~0 c_~n~0))) (.cse11 (not (<= 0 c_~end~0)))) (and (or .cse0 (let ((.cse4 (select |c_#memory_int| c_~A~0.base))) (and (or (forall ((~A~0.offset Int) (v_ArrVal_180 (Array Int Int)) (~i~0 Int)) (let ((.cse2 (+ (* ~i~0 4) ~A~0.offset))) (or (not (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180))) (= (select (select .cse1 c_~A~0.base) .cse2) (select (select .cse1 c_~queue~0.base) .cse3)))) (< c_~last~0 (select .cse4 .cse2))))) .cse5) (forall ((~A~0.offset Int) (~i~0 Int)) (let ((.cse6 (+ (* ~i~0 4) ~A~0.offset))) (or (< c_~last~0 (select .cse4 .cse6)) (forall ((v_ArrVal_180 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180))) (let ((.cse7 (select .cse10 c_~queue~0.base))) (or (< (select .cse7 .cse8) .cse9) (not (= (select (select .cse10 c_~A~0.base) .cse6) (select .cse7 .cse3)))))))))))) .cse11) (or (not (<= |c_thread1Thread1of1ForFork0_#t~mem1#1| c_~last~0)) (let ((.cse14 (+ c_~A~0.offset (* c_~i~0 4)))) (and (forall ((v_ArrVal_180 (Array Int Int))) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180))) (let ((.cse12 (select .cse13 c_~queue~0.base))) (or (< (select .cse12 .cse8) .cse9) (not (= (select (select .cse13 c_~A~0.base) .cse14) (select .cse12 .cse3))))))) (or .cse5 (forall ((v_ArrVal_180 (Array Int Int))) (not (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180))) (= (select (select .cse15 c_~A~0.base) .cse14) (select (select .cse15 c_~queue~0.base) .cse3)))))))) .cse0 .cse11))) is different from false [2022-11-25 17:32:22,795 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse8 (+ (* c_~start~0 4) c_~queue~0.offset)) (.cse9 (+ c_~v_old~0 1)) (.cse5 (not (= (mod c_~ok~0 256) 0))) (.cse3 (+ (* c_~end~0 4) c_~queue~0.offset)) (.cse0 (not (< c_~end~0 c_~n~0))) (.cse11 (not (<= 0 c_~end~0)))) (and (or .cse0 (let ((.cse4 (select |c_#memory_int| c_~A~0.base))) (and (or (forall ((~A~0.offset Int) (v_ArrVal_180 (Array Int Int)) (~i~0 Int)) (let ((.cse2 (+ (* ~i~0 4) ~A~0.offset))) (or (not (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180))) (= (select (select .cse1 c_~A~0.base) .cse2) (select (select .cse1 c_~queue~0.base) .cse3)))) (< c_~last~0 (select .cse4 .cse2))))) .cse5) (forall ((~A~0.offset Int) (~i~0 Int)) (let ((.cse6 (+ (* ~i~0 4) ~A~0.offset))) (or (< c_~last~0 (select .cse4 .cse6)) (forall ((v_ArrVal_180 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180))) (let ((.cse7 (select .cse10 c_~queue~0.base))) (or (< (select .cse7 .cse8) .cse9) (not (= (select (select .cse10 c_~A~0.base) .cse6) (select .cse7 .cse3)))))))))))) .cse11) (= c_~ok~0 1) (or (not (<= |c_thread1Thread1of1ForFork0_#t~mem1#1| c_~last~0)) (let ((.cse14 (+ c_~A~0.offset (* c_~i~0 4)))) (and (forall ((v_ArrVal_180 (Array Int Int))) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180))) (let ((.cse12 (select .cse13 c_~queue~0.base))) (or (< (select .cse12 .cse8) .cse9) (not (= (select (select .cse13 c_~A~0.base) .cse14) (select .cse12 .cse3))))))) (or .cse5 (forall ((v_ArrVal_180 (Array Int Int))) (not (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180))) (= (select (select .cse15 c_~A~0.base) .cse14) (select (select .cse15 c_~queue~0.base) .cse3)))))))) .cse0 .cse11))) is different from false [2022-11-25 17:32:28,358 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse13 (* c_~start~0 4))) (let ((.cse3 (+ .cse13 c_~queue~0.offset)) (.cse0 (not (< c_~end~0 c_~n~0))) (.cse1 (not (<= 0 c_~end~0))) (.cse8 (not (= (mod c_~ok~0 256) 0))) (.cse10 (* c_~end~0 4))) (and (<= c_~start~0 0) (<= (+ c_~start~0 1) c_~end~0) (<= 0 c_~start~0) (or .cse0 .cse1 (let ((.cse6 (+ .cse10 c_~queue~0.offset))) (and (forall ((~A~0.offset Int) (v_ArrVal_180 (Array Int Int)) (~i~0 Int) (v_ArrVal_179 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_179))) (let ((.cse7 (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180))) (let ((.cse2 (select .cse7 c_~queue~0.base)) (.cse5 (+ (* ~i~0 4) ~A~0.offset))) (or (< (select .cse2 .cse3) (+ (select (select .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse5) 1)) (not (= (select .cse2 .cse6) (select (select .cse7 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse5)))))))) (or .cse8 (forall ((~A~0.offset Int) (v_ArrVal_180 (Array Int Int)) (~i~0 Int) (v_ArrVal_179 (Array Int Int))) (not (let ((.cse9 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_179) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180))) (= (select (select .cse9 c_~queue~0.base) .cse6) (select (select .cse9 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* ~i~0 4) ~A~0.offset)))))))))) (exists ((~A~0.offset Int) (~i~0 Int) (~A~0.base Int)) (let ((.cse11 (select (select |c_#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (and (<= .cse11 c_~v_old~0) (not (= c_~queue~0.base ~A~0.base)) (= .cse11 (select (select |c_#memory_int| c_~queue~0.base) .cse3))))) (= c_~ok~0 1) (or .cse0 (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse1 (let ((.cse12 (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_109| Int)) (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_109|) 0))))) (and (or .cse8 .cse12) (or (= .cse10 .cse13) .cse12) (not (= (select |c_#valid| |c_ULTIMATE.start_main_~#t2~0#1.base|) 0)))))))) is different from false [2022-11-25 17:32:43,793 WARN L233 SmtUtils]: Spent 8.40s on a formula simplification. DAG size of input: 110 DAG size of output: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:33:09,724 INFO L130 PetriNetUnfolder]: 1912/3223 cut-off events. [2022-11-25 17:33:09,724 INFO L131 PetriNetUnfolder]: For 4744/4744 co-relation queries the response was YES. [2022-11-25 17:33:09,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11730 conditions, 3223 events. 1912/3223 cut-off events. For 4744/4744 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 18573 event pairs, 193 based on Foata normal form. 43/3260 useless extension candidates. Maximal degree in co-relation 11705. Up to 897 conditions per place. [2022-11-25 17:33:09,748 INFO L137 encePairwiseOnDemand]: 362/379 looper letters, 378 selfloop transitions, 218 changer transitions 123/719 dead transitions. [2022-11-25 17:33:09,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 719 transitions, 5289 flow [2022-11-25 17:33:09,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-25 17:33:09,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2022-11-25 17:33:09,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 8005 transitions. [2022-11-25 17:33:09,777 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2640171503957784 [2022-11-25 17:33:09,778 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 8005 transitions. [2022-11-25 17:33:09,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 8005 transitions. [2022-11-25 17:33:09,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:33:09,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 8005 transitions. [2022-11-25 17:33:09,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 100.0625) internal successors, (8005), 80 states have internal predecessors, (8005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:09,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 379.0) internal successors, (30699), 81 states have internal predecessors, (30699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:09,864 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 379.0) internal successors, (30699), 81 states have internal predecessors, (30699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:09,864 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 256 flow. Second operand 80 states and 8005 transitions. [2022-11-25 17:33:09,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 719 transitions, 5289 flow [2022-11-25 17:33:09,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 719 transitions, 5255 flow, removed 16 selfloop flow, removed 3 redundant places. [2022-11-25 17:33:09,913 INFO L231 Difference]: Finished difference. Result has 164 places, 280 transitions, 2589 flow [2022-11-25 17:33:09,913 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=2589, PETRI_PLACES=164, PETRI_TRANSITIONS=280} [2022-11-25 17:33:09,914 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 140 predicate places. [2022-11-25 17:33:09,914 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 280 transitions, 2589 flow [2022-11-25 17:33:09,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 95.03225806451613) internal successors, (2946), 31 states have internal predecessors, (2946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:09,916 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:09,916 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] [2022-11-25 17:33:09,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:33:10,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 17:33:10,129 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:33:10,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:10,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2094623690, now seen corresponding path program 2 times [2022-11-25 17:33:10,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:33:10,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193975641] [2022-11-25 17:33:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:10,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:33:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:33:11,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:33:11,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193975641] [2022-11-25 17:33:11,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193975641] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:33:11,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480624952] [2022-11-25 17:33:11,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:33:11,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:33:11,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:33:11,482 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:33:11,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:33:11,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:33:11,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:33:11,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 17:33:11,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:33:11,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:33:11,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:33:11,637 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:33:11,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-25 17:33:11,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:33:11,781 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:33:11,782 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 [2022-11-25 17:33:11,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:33:11,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:33:12,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:33:12,268 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-25 17:33:12,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 44 [2022-11-25 17:33:12,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 17:33:12,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-25 17:33:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:12,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:33:13,397 WARN L837 $PredicateComparison]: unable to prove that (or (not (< c_~end~0 c_~n~0)) (not (<= 0 c_~end~0)) (and (forall ((~A~0.offset Int) (~i~0 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int)) (~A~0.base Int)) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_225))) (let ((.cse1 (select (select .cse0 ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (or (not (= (select (select .cse0 c_~queue~0.base) (+ (* c_~end~0 4) c_~queue~0.offset)) .cse1)) (forall ((v_ArrVal_226 (Array Int Int))) (< (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_226) c_~queue~0.base) (+ (* c_~start~0 4) c_~queue~0.offset)) (+ .cse1 1))))))) (not (= (mod c_~ok~0 256) 0)))) is different from false [2022-11-25 17:33:13,620 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:33:13,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 81 [2022-11-25 17:33:13,684 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:33:13,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 5260 treesize of output 4670 [2022-11-25 17:33:13,762 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:33:13,763 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 4620 treesize of output 3704 [2022-11-25 17:33:13,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2582 treesize of output 2198 [2022-11-25 17:33:13,891 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:33:13,892 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 3276 treesize of output 2840 [2022-11-25 17:34:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-25 17:34:40,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480624952] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:34:40,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:34:40,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2022-11-25 17:34:40,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195032896] [2022-11-25 17:34:40,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:34:40,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 17:34:40,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:34:40,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 17:34:40,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=651, Unknown=16, NotChecked=54, Total=870 [2022-11-25 17:34:41,147 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 379 [2022-11-25 17:34:41,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 280 transitions, 2589 flow. Second operand has 30 states, 30 states have (on average 96.1) internal successors, (2883), 30 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:41,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:41,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 379 [2022-11-25 17:34:41,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:43,374 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_226 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_226) c_~queue~0.base) (+ (* c_~start~0 4) c_~queue~0.offset)) (+ c_~v_old~0 1))) (not (= (mod c_~ok~0 256) 0)) (= c_~ok~0 1)) is different from false [2022-11-25 17:34:52,691 INFO L130 PetriNetUnfolder]: 3687/6167 cut-off events. [2022-11-25 17:34:52,692 INFO L131 PetriNetUnfolder]: For 62927/62927 co-relation queries the response was YES. [2022-11-25 17:34:52,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37443 conditions, 6167 events. 3687/6167 cut-off events. For 62927/62927 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 38946 event pairs, 336 based on Foata normal form. 26/6190 useless extension candidates. Maximal degree in co-relation 37289. Up to 2094 conditions per place. [2022-11-25 17:34:52,803 INFO L137 encePairwiseOnDemand]: 364/379 looper letters, 478 selfloop transitions, 427 changer transitions 78/983 dead transitions. [2022-11-25 17:34:52,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 983 transitions, 11547 flow [2022-11-25 17:34:52,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-25 17:34:52,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-11-25 17:34:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 5612 transitions. [2022-11-25 17:34:52,822 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.26922523386903335 [2022-11-25 17:34:52,823 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 5612 transitions. [2022-11-25 17:34:52,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 5612 transitions. [2022-11-25 17:34:52,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:52,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 5612 transitions. [2022-11-25 17:34:52,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 102.03636363636363) internal successors, (5612), 55 states have internal predecessors, (5612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:52,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 379.0) internal successors, (21224), 56 states have internal predecessors, (21224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:52,900 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 379.0) internal successors, (21224), 56 states have internal predecessors, (21224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:52,900 INFO L175 Difference]: Start difference. First operand has 164 places, 280 transitions, 2589 flow. Second operand 55 states and 5612 transitions. [2022-11-25 17:34:52,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 983 transitions, 11547 flow [2022-11-25 17:34:53,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 983 transitions, 10235 flow, removed 654 selfloop flow, removed 13 redundant places. [2022-11-25 17:34:53,586 INFO L231 Difference]: Finished difference. Result has 228 places, 580 transitions, 6537 flow [2022-11-25 17:34:53,587 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=6537, PETRI_PLACES=228, PETRI_TRANSITIONS=580} [2022-11-25 17:34:53,587 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 204 predicate places. [2022-11-25 17:34:53,588 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 580 transitions, 6537 flow [2022-11-25 17:34:53,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 96.1) internal successors, (2883), 30 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:53,589 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:53,589 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:34:53,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:34:53,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:34:53,799 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:34:53,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:53,799 INFO L85 PathProgramCache]: Analyzing trace with hash -667662670, now seen corresponding path program 3 times [2022-11-25 17:34:53,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:34:53,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168501829] [2022-11-25 17:34:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:53,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:34:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:34:56,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:34:56,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168501829] [2022-11-25 17:34:56,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168501829] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:34:56,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713863842] [2022-11-25 17:34:56,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:34:56,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:34:56,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:34:56,371 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:34:56,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:34:56,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:34:56,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:34:56,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 17:34:56,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:34:56,987 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-25 17:34:56,987 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 42 treesize of output 10 [2022-11-25 17:34:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:34:57,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:34:59,513 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:34:59,514 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 74 treesize of output 125 [2022-11-25 17:35:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:35:00,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713863842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:35:00,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:35:00,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 24 [2022-11-25 17:35:00,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495914039] [2022-11-25 17:35:00,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:35:00,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 17:35:00,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:35:00,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 17:35:00,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-11-25 17:35:03,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:35:05,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:35:08,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:35:10,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:35:13,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:35:14,092 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 379 [2022-11-25 17:35:14,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 580 transitions, 6537 flow. Second operand has 26 states, 26 states have (on average 125.5) internal successors, (3263), 26 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:14,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:35:14,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 379 [2022-11-25 17:35:14,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:35:21,577 INFO L130 PetriNetUnfolder]: 4206/7012 cut-off events. [2022-11-25 17:35:21,577 INFO L131 PetriNetUnfolder]: For 130164/130164 co-relation queries the response was YES. [2022-11-25 17:35:21,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50238 conditions, 7012 events. 4206/7012 cut-off events. For 130164/130164 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 45533 event pairs, 328 based on Foata normal form. 1/7013 useless extension candidates. Maximal degree in co-relation 50047. Up to 2560 conditions per place. [2022-11-25 17:35:21,672 INFO L137 encePairwiseOnDemand]: 364/379 looper letters, 407 selfloop transitions, 408 changer transitions 17/832 dead transitions. [2022-11-25 17:35:21,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 832 transitions, 11546 flow [2022-11-25 17:35:21,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 17:35:21,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-25 17:35:21,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3482 transitions. [2022-11-25 17:35:21,680 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3402716700869735 [2022-11-25 17:35:21,681 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3482 transitions. [2022-11-25 17:35:21,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3482 transitions. [2022-11-25 17:35:21,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:35:21,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3482 transitions. [2022-11-25 17:35:21,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 128.96296296296296) internal successors, (3482), 27 states have internal predecessors, (3482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:21,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 379.0) internal successors, (10612), 28 states have internal predecessors, (10612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:21,705 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 379.0) internal successors, (10612), 28 states have internal predecessors, (10612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:21,705 INFO L175 Difference]: Start difference. First operand has 228 places, 580 transitions, 6537 flow. Second operand 27 states and 3482 transitions. [2022-11-25 17:35:21,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 832 transitions, 11546 flow [2022-11-25 17:35:22,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 832 transitions, 10512 flow, removed 356 selfloop flow, removed 16 redundant places. [2022-11-25 17:35:22,998 INFO L231 Difference]: Finished difference. Result has 241 places, 679 transitions, 8340 flow [2022-11-25 17:35:22,999 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=5798, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8340, PETRI_PLACES=241, PETRI_TRANSITIONS=679} [2022-11-25 17:35:23,000 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 217 predicate places. [2022-11-25 17:35:23,000 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 679 transitions, 8340 flow [2022-11-25 17:35:23,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 125.5) internal successors, (3263), 26 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:23,002 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:35:23,002 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:35:23,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:35:23,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:35:23,204 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:35:23,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:35:23,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1017439431, now seen corresponding path program 4 times [2022-11-25 17:35:23,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:35:23,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075922922] [2022-11-25 17:35:23,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:35:23,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:35:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:35:23,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:35:23,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075922922] [2022-11-25 17:35:23,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075922922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:35:23,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111931095] [2022-11-25 17:35:23,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:35:23,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:35:23,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:35:23,477 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:35:23,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:35:23,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:35:23,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:35:23,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:35:23,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:35:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:35:23,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:35:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:35:23,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111931095] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:35:23,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:35:23,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 4] total 8 [2022-11-25 17:35:23,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597273200] [2022-11-25 17:35:23,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:35:23,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:35:23,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:35:23,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:35:23,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:35:23,892 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 379 [2022-11-25 17:35:23,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 679 transitions, 8340 flow. Second operand has 9 states, 9 states have (on average 165.88888888888889) internal successors, (1493), 9 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:23,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:35:23,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 379 [2022-11-25 17:35:23,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:35:27,290 INFO L130 PetriNetUnfolder]: 4521/7807 cut-off events. [2022-11-25 17:35:27,291 INFO L131 PetriNetUnfolder]: For 191586/191856 co-relation queries the response was YES. [2022-11-25 17:35:27,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60281 conditions, 7807 events. 4521/7807 cut-off events. For 191586/191856 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 53942 event pairs, 443 based on Foata normal form. 538/8281 useless extension candidates. Maximal degree in co-relation 60163. Up to 3706 conditions per place. [2022-11-25 17:35:27,408 INFO L137 encePairwiseOnDemand]: 375/379 looper letters, 446 selfloop transitions, 268 changer transitions 83/832 dead transitions. [2022-11-25 17:35:27,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 832 transitions, 12074 flow [2022-11-25 17:35:27,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:35:27,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:35:27,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1195 transitions. [2022-11-25 17:35:27,412 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.450433471541651 [2022-11-25 17:35:27,412 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1195 transitions. [2022-11-25 17:35:27,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1195 transitions. [2022-11-25 17:35:27,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:35:27,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1195 transitions. [2022-11-25 17:35:27,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 170.71428571428572) internal successors, (1195), 7 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:27,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 379.0) internal successors, (3032), 8 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:27,419 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 379.0) internal successors, (3032), 8 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:27,419 INFO L175 Difference]: Start difference. First operand has 241 places, 679 transitions, 8340 flow. Second operand 7 states and 1195 transitions. [2022-11-25 17:35:27,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 832 transitions, 12074 flow [2022-11-25 17:35:29,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 832 transitions, 11767 flow, removed 133 selfloop flow, removed 20 redundant places. [2022-11-25 17:35:29,319 INFO L231 Difference]: Finished difference. Result has 218 places, 699 transitions, 9971 flow [2022-11-25 17:35:29,320 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=7062, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9971, PETRI_PLACES=218, PETRI_TRANSITIONS=699} [2022-11-25 17:35:29,321 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 194 predicate places. [2022-11-25 17:35:29,321 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 699 transitions, 9971 flow [2022-11-25 17:35:29,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 165.88888888888889) internal successors, (1493), 9 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:29,321 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:35:29,322 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:35:29,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:35:29,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:35:29,523 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:35:29,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:35:29,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1280834787, now seen corresponding path program 5 times [2022-11-25 17:35:29,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:35:29,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314255280] [2022-11-25 17:35:29,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:35:29,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:35:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:35:29,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:35:29,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314255280] [2022-11-25 17:35:29,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314255280] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:35:29,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203750582] [2022-11-25 17:35:29,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:35:29,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:35:29,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:35:29,771 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:35:29,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:35:29,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:35:29,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:35:29,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:35:29,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:35:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:35:30,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:35:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:35:30,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203750582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:35:30,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:35:30,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2022-11-25 17:35:30,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631708744] [2022-11-25 17:35:30,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:35:30,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 17:35:30,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:35:30,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 17:35:30,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:35:30,837 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 379 [2022-11-25 17:35:30,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 699 transitions, 9971 flow. Second operand has 16 states, 16 states have (on average 157.0625) internal successors, (2513), 16 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:30,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:35:30,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 379 [2022-11-25 17:35:30,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:35:35,394 INFO L130 PetriNetUnfolder]: 6792/11924 cut-off events. [2022-11-25 17:35:35,394 INFO L131 PetriNetUnfolder]: For 204471/204948 co-relation queries the response was YES. [2022-11-25 17:35:35,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90743 conditions, 11924 events. 6792/11924 cut-off events. For 204471/204948 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 91661 event pairs, 793 based on Foata normal form. 244/12040 useless extension candidates. Maximal degree in co-relation 89781. Up to 4131 conditions per place. [2022-11-25 17:35:35,686 INFO L137 encePairwiseOnDemand]: 372/379 looper letters, 1062 selfloop transitions, 215 changer transitions 0/1312 dead transitions. [2022-11-25 17:35:35,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 1312 transitions, 21227 flow [2022-11-25 17:35:35,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:35:35,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:35:35,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1621 transitions. [2022-11-25 17:35:35,708 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4277044854881267 [2022-11-25 17:35:35,708 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1621 transitions. [2022-11-25 17:35:35,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1621 transitions. [2022-11-25 17:35:35,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:35:35,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1621 transitions. [2022-11-25 17:35:35,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 162.1) internal successors, (1621), 10 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:35,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 379.0) internal successors, (4169), 11 states have internal predecessors, (4169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:35,716 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 379.0) internal successors, (4169), 11 states have internal predecessors, (4169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:35,716 INFO L175 Difference]: Start difference. First operand has 218 places, 699 transitions, 9971 flow. Second operand 10 states and 1621 transitions. [2022-11-25 17:35:35,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 1312 transitions, 21227 flow [2022-11-25 17:35:38,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 1312 transitions, 20907 flow, removed 152 selfloop flow, removed 1 redundant places. [2022-11-25 17:35:38,268 INFO L231 Difference]: Finished difference. Result has 229 places, 816 transitions, 12146 flow [2022-11-25 17:35:38,269 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=9835, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12146, PETRI_PLACES=229, PETRI_TRANSITIONS=816} [2022-11-25 17:35:38,269 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 205 predicate places. [2022-11-25 17:35:38,269 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 816 transitions, 12146 flow [2022-11-25 17:35:38,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 157.0625) internal successors, (2513), 16 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:38,270 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:35:38,270 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:35:38,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:35:38,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:35:38,475 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:35:38,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:35:38,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1695169610, now seen corresponding path program 6 times [2022-11-25 17:35:38,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:35:38,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433269620] [2022-11-25 17:35:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:35:38,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:35:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:35:41,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:35:41,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433269620] [2022-11-25 17:35:41,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433269620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:35:41,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803923399] [2022-11-25 17:35:41,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:35:41,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:35:41,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:35:41,611 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:35:41,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:35:41,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:35:41,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:35:41,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 17:35:41,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:35:42,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:42,276 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-25 17:35:42,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 44 [2022-11-25 17:35:42,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 17:35:42,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-25 17:35:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:35:42,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:35:43,065 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:35:43,065 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 94 treesize of output 139 [2022-11-25 17:35:43,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-11-25 17:35:43,507 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 17:35:43,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803923399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:35:43,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:35:43,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 32 [2022-11-25 17:35:43,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250015397] [2022-11-25 17:35:43,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:35:43,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 17:35:43,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:35:43,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 17:35:43,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=924, Unknown=2, NotChecked=0, Total=1122 [2022-11-25 17:35:47,673 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 379 [2022-11-25 17:35:47,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 816 transitions, 12146 flow. Second operand has 34 states, 34 states have (on average 94.02941176470588) internal successors, (3197), 34 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:47,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:35:47,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 379 [2022-11-25 17:35:47,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:35:56,907 INFO L130 PetriNetUnfolder]: 8820/15283 cut-off events. [2022-11-25 17:35:56,907 INFO L131 PetriNetUnfolder]: For 266857/266857 co-relation queries the response was YES. [2022-11-25 17:35:57,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121098 conditions, 15283 events. 8820/15283 cut-off events. For 266857/266857 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 118775 event pairs, 591 based on Foata normal form. 6/15289 useless extension candidates. Maximal degree in co-relation 120211. Up to 5339 conditions per place. [2022-11-25 17:35:57,096 INFO L137 encePairwiseOnDemand]: 364/379 looper letters, 562 selfloop transitions, 624 changer transitions 45/1231 dead transitions. [2022-11-25 17:35:57,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 1231 transitions, 21034 flow [2022-11-25 17:35:57,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 17:35:57,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-25 17:35:57,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2550 transitions. [2022-11-25 17:35:57,102 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.25877816115283137 [2022-11-25 17:35:57,102 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2550 transitions. [2022-11-25 17:35:57,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2550 transitions. [2022-11-25 17:35:57,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:35:57,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2550 transitions. [2022-11-25 17:35:57,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 98.07692307692308) internal successors, (2550), 26 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:57,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 379.0) internal successors, (10233), 27 states have internal predecessors, (10233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:57,122 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 379.0) internal successors, (10233), 27 states have internal predecessors, (10233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:57,122 INFO L175 Difference]: Start difference. First operand has 229 places, 816 transitions, 12146 flow. Second operand 26 states and 2550 transitions. [2022-11-25 17:35:57,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 1231 transitions, 21034 flow [2022-11-25 17:36:02,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 1231 transitions, 20755 flow, removed 79 selfloop flow, removed 3 redundant places. [2022-11-25 17:36:02,202 INFO L231 Difference]: Finished difference. Result has 259 places, 956 transitions, 16333 flow [2022-11-25 17:36:02,203 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=12020, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=816, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=492, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=16333, PETRI_PLACES=259, PETRI_TRANSITIONS=956} [2022-11-25 17:36:02,204 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 235 predicate places. [2022-11-25 17:36:02,204 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 956 transitions, 16333 flow [2022-11-25 17:36:02,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 94.02941176470588) internal successors, (3197), 34 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:02,205 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:36:02,205 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:36:02,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-25 17:36:02,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:36:02,412 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:36:02,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:36:02,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1825181786, now seen corresponding path program 7 times [2022-11-25 17:36:02,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:36:02,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993417999] [2022-11-25 17:36:02,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:02,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:36:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:36:06,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:36:06,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993417999] [2022-11-25 17:36:06,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993417999] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:36:06,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147329205] [2022-11-25 17:36:06,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:36:06,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:36:06,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:36:06,228 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:36:06,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:36:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:06,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 17:36:06,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:36:06,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:36:06,834 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 18 treesize of output 20 [2022-11-25 17:36:07,205 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-25 17:36:07,205 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 42 treesize of output 10 [2022-11-25 17:36:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:36:07,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:36:12,753 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:36:12,754 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 258 treesize of output 277 [2022-11-25 17:36:12,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:36:12,800 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 174 treesize of output 189 [2022-11-25 17:36:12,829 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:36:12,829 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 144 treesize of output 137 [2022-11-25 17:36:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 17:36:14,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147329205] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:36:14,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:36:14,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 33 [2022-11-25 17:36:14,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144162780] [2022-11-25 17:36:14,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:36:14,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 17:36:14,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:36:14,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 17:36:14,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1007, Unknown=1, NotChecked=0, Total=1190 [2022-11-25 17:36:15,913 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 379 [2022-11-25 17:36:15,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 956 transitions, 16333 flow. Second operand has 35 states, 35 states have (on average 90.97142857142858) internal successors, (3184), 35 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:15,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:36:15,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 379 [2022-11-25 17:36:15,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:36:27,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:36:35,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:36:54,938 WARN L233 SmtUtils]: Spent 18.37s on a formula simplification. DAG size of input: 79 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:37:13,663 WARN L233 SmtUtils]: Spent 18.45s on a formula simplification. DAG size of input: 83 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:37:15,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:37:17,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:37:47,461 WARN L233 SmtUtils]: Spent 18.24s on a formula simplification. DAG size of input: 77 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:37:56,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:37:58,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:38:00,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:38:10,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:38:12,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:38:14,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:38:17,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:38:17,121 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (not (= (mod c_~ok~0 256) 0))) (.cse4 (* c_~end~0 4)) (.cse9 (* c_~start~0 4)) (.cse10 (+ c_~v_old~0 1)) (.cse5 (+ c_~A~0.offset (* c_~i~0 4)))) (let ((.cse1 (and (not (< c_~start~0 c_~end~0)) (not (< c_~i~0 c_~N~0)))) (.cse0 (not (<= |c_thread1Thread1of1ForFork0_#t~mem1#1| c_~last~0))) (.cse2 (let ((.cse11 (select (select |c_#memory_int| c_~A~0.base) .cse5))) (and (or .cse6 (forall ((~queue~0.base Int) (~queue~0.offset Int)) (not (= (select (select |c_#memory_int| ~queue~0.base) (+ .cse4 ~queue~0.offset)) .cse11)))) (forall ((~queue~0.base Int) (~queue~0.offset Int)) (let ((.cse12 (select |c_#memory_int| ~queue~0.base))) (or (not (= (select .cse12 (+ .cse4 ~queue~0.offset)) .cse11)) (< (select .cse12 (+ .cse9 ~queue~0.offset)) .cse10)))))))) (and (= 2 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#t2~0#1.base|) (or .cse0 .cse1 .cse2) (or .cse0 .cse1 (and (or (forall ((~queue~0.base Int) (~queue~0.offset Int) (v_ArrVal_454 (Array Int Int))) (not (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_454))) (= (select (select .cse3 ~queue~0.base) (+ .cse4 ~queue~0.offset)) (select (select .cse3 c_~A~0.base) .cse5))))) .cse6) (forall ((~queue~0.base Int) (~queue~0.offset Int) (v_ArrVal_454 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_454))) (let ((.cse7 (select .cse8 ~queue~0.base))) (or (not (= (select .cse7 (+ .cse4 ~queue~0.offset)) (select (select .cse8 c_~A~0.base) .cse5))) (< (select .cse7 (+ .cse9 ~queue~0.offset)) .cse10))))))) (= c_~ok~0 1) (<= (+ 2 c_~A~0.base) |c_ULTIMATE.start_main_~#t2~0#1.base|) (<= c_~last~0 c_~v_old~0) (= c_~start~0 c_~end~0) (<= (+ 2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_main_~#t2~0#1.base|) (or .cse0 (= (mod |c_thread2Thread1of1ForFork1_~cond~0#1| 256) 0) .cse2)))) is different from false [2022-11-25 17:38:19,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:38:21,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:38:30,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:38:45,688 WARN L233 SmtUtils]: Spent 10.39s on a formula simplification. DAG size of input: 81 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:38:47,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:38:49,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:38:58,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:39:00,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:39:03,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:39:05,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:39:07,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:39:09,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:39:12,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:39:14,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:39:16,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:39:19,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:39:24,288 INFO L130 PetriNetUnfolder]: 10458/18417 cut-off events. [2022-11-25 17:39:24,288 INFO L131 PetriNetUnfolder]: For 358991/358991 co-relation queries the response was YES. [2022-11-25 17:39:24,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154197 conditions, 18417 events. 10458/18417 cut-off events. For 358991/358991 co-relation queries the response was YES. Maximal size of possible extension queue 1015. Compared 149581 event pairs, 1200 based on Foata normal form. 10/18427 useless extension candidates. Maximal degree in co-relation 154070. Up to 7189 conditions per place. [2022-11-25 17:39:24,562 INFO L137 encePairwiseOnDemand]: 358/379 looper letters, 597 selfloop transitions, 859 changer transitions 114/1570 dead transitions. [2022-11-25 17:39:24,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 1570 transitions, 28369 flow [2022-11-25 17:39:24,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-25 17:39:24,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-11-25 17:39:24,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 5082 transitions. [2022-11-25 17:39:24,573 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.24831427733802405 [2022-11-25 17:39:24,573 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 5082 transitions. [2022-11-25 17:39:24,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 5082 transitions. [2022-11-25 17:39:24,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:39:24,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 5082 transitions. [2022-11-25 17:39:24,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 94.11111111111111) internal successors, (5082), 54 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:24,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 379.0) internal successors, (20845), 55 states have internal predecessors, (20845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:24,609 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 379.0) internal successors, (20845), 55 states have internal predecessors, (20845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:24,609 INFO L175 Difference]: Start difference. First operand has 259 places, 956 transitions, 16333 flow. Second operand 54 states and 5082 transitions. [2022-11-25 17:39:24,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 1570 transitions, 28369 flow [2022-11-25 17:39:32,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 1570 transitions, 27720 flow, removed 87 selfloop flow, removed 8 redundant places. [2022-11-25 17:39:32,665 INFO L231 Difference]: Finished difference. Result has 326 places, 1223 transitions, 23763 flow [2022-11-25 17:39:32,666 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=15912, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=956, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=595, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=23763, PETRI_PLACES=326, PETRI_TRANSITIONS=1223} [2022-11-25 17:39:32,666 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 302 predicate places. [2022-11-25 17:39:32,667 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 1223 transitions, 23763 flow [2022-11-25 17:39:32,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 90.97142857142858) internal successors, (3184), 35 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:32,668 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:39:32,668 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:39:32,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:39:32,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:39:32,874 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:39:32,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:39:32,875 INFO L85 PathProgramCache]: Analyzing trace with hash 335534445, now seen corresponding path program 1 times [2022-11-25 17:39:32,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:39:32,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389819689] [2022-11-25 17:39:32,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:39:32,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:39:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:39:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:39:33,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:39:33,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389819689] [2022-11-25 17:39:33,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389819689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:39:33,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488598388] [2022-11-25 17:39:33,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:39:33,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:39:33,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:39:33,071 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:39:33,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:39:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:39:33,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:39:33,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:39:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:39:33,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:39:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:39:33,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488598388] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:39:33,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:39:33,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-11-25 17:39:33,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397703227] [2022-11-25 17:39:33,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:39:33,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:39:33,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:39:33,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:39:33,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:39:33,981 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 379 [2022-11-25 17:39:33,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 1223 transitions, 23763 flow. Second operand has 15 states, 15 states have (on average 156.46666666666667) internal successors, (2347), 15 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:33,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:39:33,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 379 [2022-11-25 17:39:33,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:39:42,046 INFO L130 PetriNetUnfolder]: 7438/13257 cut-off events. [2022-11-25 17:39:42,046 INFO L131 PetriNetUnfolder]: For 370902/371377 co-relation queries the response was YES. [2022-11-25 17:39:42,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127409 conditions, 13257 events. 7438/13257 cut-off events. For 370902/371377 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 103230 event pairs, 1149 based on Foata normal form. 345/13534 useless extension candidates. Maximal degree in co-relation 126022. Up to 9032 conditions per place. [2022-11-25 17:39:42,324 INFO L137 encePairwiseOnDemand]: 371/379 looper letters, 968 selfloop transitions, 79 changer transitions 187/1300 dead transitions. [2022-11-25 17:39:42,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 1300 transitions, 27551 flow [2022-11-25 17:39:42,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:39:42,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:39:42,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1442 transitions. [2022-11-25 17:39:42,328 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42274992670771033 [2022-11-25 17:39:42,328 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1442 transitions. [2022-11-25 17:39:42,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1442 transitions. [2022-11-25 17:39:42,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:39:42,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1442 transitions. [2022-11-25 17:39:42,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.22222222222223) internal successors, (1442), 9 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:42,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 379.0) internal successors, (3790), 10 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:42,336 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 379.0) internal successors, (3790), 10 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:42,336 INFO L175 Difference]: Start difference. First operand has 326 places, 1223 transitions, 23763 flow. Second operand 9 states and 1442 transitions. [2022-11-25 17:39:42,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 1300 transitions, 27551 flow [2022-11-25 17:39:48,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 1300 transitions, 26946 flow, removed 276 selfloop flow, removed 18 redundant places. [2022-11-25 17:39:48,317 INFO L231 Difference]: Finished difference. Result has 299 places, 986 transitions, 18745 flow [2022-11-25 17:39:48,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=20631, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1097, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1018, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18745, PETRI_PLACES=299, PETRI_TRANSITIONS=986} [2022-11-25 17:39:48,318 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 275 predicate places. [2022-11-25 17:39:48,318 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 986 transitions, 18745 flow [2022-11-25 17:39:48,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 156.46666666666667) internal successors, (2347), 15 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:48,318 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:39:48,318 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:39:48,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:39:48,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 17:39:48,523 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:39:48,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:39:48,523 INFO L85 PathProgramCache]: Analyzing trace with hash -607719828, now seen corresponding path program 2 times [2022-11-25 17:39:48,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:39:48,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024712564] [2022-11-25 17:39:48,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:39:48,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:39:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:39:48,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 17:39:48,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:39:48,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024712564] [2022-11-25 17:39:48,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024712564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:39:48,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808797429] [2022-11-25 17:39:48,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:39:48,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:39:48,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:39:48,674 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:39:48,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:39:48,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:39:48,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:39:48,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:39:48,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:39:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 17:39:48,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:39:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 17:39:48,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808797429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:39:48,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:39:48,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2022-11-25 17:39:48,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378077161] [2022-11-25 17:39:48,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:39:48,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:39:48,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:39:48,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:39:48,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:39:49,032 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 379 [2022-11-25 17:39:49,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 986 transitions, 18745 flow. Second operand has 8 states, 8 states have (on average 165.625) internal successors, (1325), 8 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:49,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:39:49,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 379 [2022-11-25 17:39:49,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:39:56,283 INFO L130 PetriNetUnfolder]: 8298/14306 cut-off events. [2022-11-25 17:39:56,283 INFO L131 PetriNetUnfolder]: For 323492/323492 co-relation queries the response was YES. [2022-11-25 17:39:56,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130005 conditions, 14306 events. 8298/14306 cut-off events. For 323492/323492 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 107881 event pairs, 971 based on Foata normal form. 110/14416 useless extension candidates. Maximal degree in co-relation 129904. Up to 4895 conditions per place. [2022-11-25 17:39:56,533 INFO L137 encePairwiseOnDemand]: 373/379 looper letters, 661 selfloop transitions, 558 changer transitions 1/1220 dead transitions. [2022-11-25 17:39:56,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 1220 transitions, 24820 flow [2022-11-25 17:39:56,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:39:56,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:39:56,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1021 transitions. [2022-11-25 17:39:56,535 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4489885664028144 [2022-11-25 17:39:56,535 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1021 transitions. [2022-11-25 17:39:56,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1021 transitions. [2022-11-25 17:39:56,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:39:56,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1021 transitions. [2022-11-25 17:39:56,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 170.16666666666666) internal successors, (1021), 6 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:56,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 379.0) internal successors, (2653), 7 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:56,540 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 379.0) internal successors, (2653), 7 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:56,540 INFO L175 Difference]: Start difference. First operand has 299 places, 986 transitions, 18745 flow. Second operand 6 states and 1021 transitions. [2022-11-25 17:39:56,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 1220 transitions, 24820 flow [2022-11-25 17:40:01,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 1220 transitions, 24534 flow, removed 37 selfloop flow, removed 11 redundant places. [2022-11-25 17:40:01,494 INFO L231 Difference]: Finished difference. Result has 277 places, 1100 transitions, 23021 flow [2022-11-25 17:40:01,495 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=18460, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=983, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=441, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=23021, PETRI_PLACES=277, PETRI_TRANSITIONS=1100} [2022-11-25 17:40:01,496 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 253 predicate places. [2022-11-25 17:40:01,496 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 1100 transitions, 23021 flow [2022-11-25 17:40:01,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 165.625) internal successors, (1325), 8 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:01,497 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:40:01,497 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:40:01,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-25 17:40:01,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 17:40:01,703 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:40:01,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:40:01,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1041959468, now seen corresponding path program 3 times [2022-11-25 17:40:01,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:40:01,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685970021] [2022-11-25 17:40:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:01,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:40:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:40:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 17:40:02,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:40:02,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685970021] [2022-11-25 17:40:02,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685970021] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:40:02,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40685948] [2022-11-25 17:40:02,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:40:02,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:02,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:40:02,219 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:40:02,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:40:02,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:40:02,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:40:02,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:40:02,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:40:02,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:40:02,546 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 14 treesize of output 16 [2022-11-25 17:40:02,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 17:40:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 17:40:02,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:40:02,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40685948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:40:02,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:40:02,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2022-11-25 17:40:02,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560219741] [2022-11-25 17:40:02,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:40:02,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:40:02,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:40:02,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:40:02,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:40:02,755 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 379 [2022-11-25 17:40:02,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 1100 transitions, 23021 flow. Second operand has 6 states, 6 states have (on average 153.66666666666666) internal successors, (922), 6 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:02,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:40:02,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 379 [2022-11-25 17:40:02,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:40:08,127 INFO L130 PetriNetUnfolder]: 6130/10659 cut-off events. [2022-11-25 17:40:08,128 INFO L131 PetriNetUnfolder]: For 277321/277735 co-relation queries the response was YES. [2022-11-25 17:40:08,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103990 conditions, 10659 events. 6130/10659 cut-off events. For 277321/277735 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 77449 event pairs, 675 based on Foata normal form. 84/10686 useless extension candidates. Maximal degree in co-relation 103892. Up to 9768 conditions per place. [2022-11-25 17:40:08,255 INFO L137 encePairwiseOnDemand]: 372/379 looper letters, 755 selfloop transitions, 86 changer transitions 0/892 dead transitions. [2022-11-25 17:40:08,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 892 transitions, 20162 flow [2022-11-25 17:40:08,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:40:08,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:40:08,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 940 transitions. [2022-11-25 17:40:08,257 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4133685136323659 [2022-11-25 17:40:08,258 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 940 transitions. [2022-11-25 17:40:08,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 940 transitions. [2022-11-25 17:40:08,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:40:08,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 940 transitions. [2022-11-25 17:40:08,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 156.66666666666666) internal successors, (940), 6 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:08,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 379.0) internal successors, (2653), 7 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:08,263 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 379.0) internal successors, (2653), 7 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:08,263 INFO L175 Difference]: Start difference. First operand has 277 places, 1100 transitions, 23021 flow. Second operand 6 states and 940 transitions. [2022-11-25 17:40:08,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 892 transitions, 20162 flow [2022-11-25 17:40:12,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 892 transitions, 19133 flow, removed 106 selfloop flow, removed 14 redundant places. [2022-11-25 17:40:12,684 INFO L231 Difference]: Finished difference. Result has 266 places, 886 transitions, 17569 flow [2022-11-25 17:40:12,685 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=17397, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=886, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=800, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=17569, PETRI_PLACES=266, PETRI_TRANSITIONS=886} [2022-11-25 17:40:12,685 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 242 predicate places. [2022-11-25 17:40:12,685 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 886 transitions, 17569 flow [2022-11-25 17:40:12,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 153.66666666666666) internal successors, (922), 6 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:12,686 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:40:12,686 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:40:12,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:40:12,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 17:40:12,889 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:40:12,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:40:12,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1888267956, now seen corresponding path program 8 times [2022-11-25 17:40:12,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:40:12,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409355185] [2022-11-25 17:40:12,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:12,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:40:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:40:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:40:13,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:40:13,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409355185] [2022-11-25 17:40:13,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409355185] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:40:13,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851000037] [2022-11-25 17:40:13,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:40:13,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:13,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:40:13,119 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:40:13,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:40:13,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:40:13,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:40:13,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:40:13,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:40:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:40:13,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:40:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:40:13,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851000037] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:40:13,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:40:13,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-25 17:40:13,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601957694] [2022-11-25 17:40:13,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:40:13,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:40:13,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:40:13,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:40:13,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:40:13,842 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 379 [2022-11-25 17:40:13,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 886 transitions, 17569 flow. Second operand has 12 states, 12 states have (on average 158.66666666666666) internal successors, (1904), 12 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:13,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:40:13,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 379 [2022-11-25 17:40:13,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:40:17,034 INFO L130 PetriNetUnfolder]: 3636/6648 cut-off events. [2022-11-25 17:40:17,035 INFO L131 PetriNetUnfolder]: For 136451/136622 co-relation queries the response was YES. [2022-11-25 17:40:17,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61348 conditions, 6648 events. 3636/6648 cut-off events. For 136451/136622 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 46996 event pairs, 1260 based on Foata normal form. 209/6837 useless extension candidates. Maximal degree in co-relation 61259. Up to 4720 conditions per place. [2022-11-25 17:40:17,133 INFO L137 encePairwiseOnDemand]: 375/379 looper letters, 347 selfloop transitions, 3 changer transitions 293/666 dead transitions. [2022-11-25 17:40:17,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 666 transitions, 14824 flow [2022-11-25 17:40:17,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:40:17,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:40:17,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 975 transitions. [2022-11-25 17:40:17,136 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4287598944591029 [2022-11-25 17:40:17,136 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 975 transitions. [2022-11-25 17:40:17,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 975 transitions. [2022-11-25 17:40:17,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:40:17,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 975 transitions. [2022-11-25 17:40:17,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 162.5) internal successors, (975), 6 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:17,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 379.0) internal successors, (2653), 7 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:17,141 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 379.0) internal successors, (2653), 7 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:17,142 INFO L175 Difference]: Start difference. First operand has 266 places, 886 transitions, 17569 flow. Second operand 6 states and 975 transitions. [2022-11-25 17:40:17,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 666 transitions, 14824 flow [2022-11-25 17:40:18,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 666 transitions, 14432 flow, removed 11 selfloop flow, removed 10 redundant places. [2022-11-25 17:40:18,915 INFO L231 Difference]: Finished difference. Result has 250 places, 373 transitions, 7385 flow [2022-11-25 17:40:18,915 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=12641, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7385, PETRI_PLACES=250, PETRI_TRANSITIONS=373} [2022-11-25 17:40:18,916 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 226 predicate places. [2022-11-25 17:40:18,916 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 373 transitions, 7385 flow [2022-11-25 17:40:18,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 158.66666666666666) internal successors, (1904), 12 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:18,916 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:40:18,917 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] [2022-11-25 17:40:18,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:40:19,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 17:40:19,123 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:40:19,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:40:19,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1301765720, now seen corresponding path program 9 times [2022-11-25 17:40:19,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:40:19,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629911197] [2022-11-25 17:40:19,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:19,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:40:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:40:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:40:21,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:40:21,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629911197] [2022-11-25 17:40:21,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629911197] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:40:21,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555583595] [2022-11-25 17:40:21,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:40:21,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:21,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:40:21,154 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:40:21,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df68a6e-f119-4920-9fae-0d3da187c3ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:40:21,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:40:21,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:40:21,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-25 17:40:21,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:40:21,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:40:21,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:40:21,516 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:40:21,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-25 17:40:21,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:40:21,795 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:40:21,796 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 [2022-11-25 17:40:21,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:40:21,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:40:21,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:40:22,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:40:23,408 INFO L321 Elim1Store]: treesize reduction 113, result has 33.1 percent of original size [2022-11-25 17:40:23,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 80 treesize of output 71 [2022-11-25 17:40:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:40:23,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:40:31,391 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:40:31,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 249 treesize of output 165 [2022-11-25 17:40:31,770 INFO L321 Elim1Store]: treesize reduction 25, result has 84.7 percent of original size [2022-11-25 17:40:31,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 41379 treesize of output 38428 [2022-11-25 17:40:32,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:40:32,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:40:32,383 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:40:32,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 38291 treesize of output 33779 [2022-11-25 17:40:32,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:40:32,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:40:32,846 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:40:32,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 33588 treesize of output 31392 [2022-11-25 17:40:33,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:40:33,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:40:33,395 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:40:33,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 31343 treesize of output 22199