./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 --- 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-2329fc7 [2022-12-13 14:31:11,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:31:11,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:31:11,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:31:11,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:31:11,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:31:11,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:31:11,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:31:11,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:31:11,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:31:11,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:31:11,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:31:11,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:31:11,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:31:11,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:31:11,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:31:11,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:31:11,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:31:11,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:31:11,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:31:11,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:31:11,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:31:11,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:31:11,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:31:11,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:31:11,217 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:31:11,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:31:11,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:31:11,218 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:31:11,218 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:31:11,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:31:11,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:31:11,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:31:11,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:31:11,220 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:31:11,221 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:31:11,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:31:11,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:31:11,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:31:11,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:31:11,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:31:11,223 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 14:31:11,236 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:31:11,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:31:11,236 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:31:11,236 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:31:11,237 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:31:11,237 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:31:11,237 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:31:11,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:31:11,237 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:31:11,238 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:31:11,238 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:31:11,238 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 14:31:11,238 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:31:11,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:31:11,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:31:11,238 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 14:31:11,238 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 14:31:11,238 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 14:31:11,239 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:31:11,239 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 14:31:11,239 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:31:11,239 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:31:11,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:31:11,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:31:11,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:31:11,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:31:11,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:31:11,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:31:11,240 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:31:11,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:31:11,240 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:31:11,240 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:31:11,240 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:31:11,240 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:31:11,241 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_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 [2022-12-13 14:31:11,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:31:11,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:31:11,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:31:11,440 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:31:11,440 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:31:11,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-12-13 14:31:14,025 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:31:14,203 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:31:14,203 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-12-13 14:31:14,208 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/data/b1cebd90a/e41c0bb1e365437bbf9a1e489c20e8a4/FLAGa0e51a9db [2022-12-13 14:31:14,602 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/data/b1cebd90a/e41c0bb1e365437bbf9a1e489c20e8a4 [2022-12-13 14:31:14,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:31:14,605 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:31:14,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:31:14,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:31:14,609 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:31:14,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:31:14" (1/1) ... [2022-12-13 14:31:14,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4456bc92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:14, skipping insertion in model container [2022-12-13 14:31:14,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:31:14" (1/1) ... [2022-12-13 14:31:14,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:31:14,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:31:14,732 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:14,733 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:14,733 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:14,735 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:14,736 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:14,736 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:14,739 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:14,739 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:14,739 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:14,741 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:14,741 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:14,741 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:14,742 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:14,743 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:14,744 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:14,745 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:14,745 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:14,746 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:14,747 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:14,748 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:14,748 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:14,750 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:14,750 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:14,751 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:14,761 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_d079c832-f3ef-4b24-9703-6f76ddafcb22/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-12-13 14:31:14,770 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:31:14,780 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-13 14:31:14,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@69dab105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:14, skipping insertion in model container [2022-12-13 14:31:14,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:31:14,781 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 14:31:14,782 INFO L158 Benchmark]: Toolchain (without parser) took 176.55ms. Allocated memory is still 161.5MB. Free memory was 125.2MB in the beginning and 113.6MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-13 14:31:14,783 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 161.5MB. Free memory was 135.3MB in the beginning and 135.3MB in the end (delta: 25.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 14:31:14,783 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.15ms. Allocated memory is still 161.5MB. Free memory was 125.2MB in the beginning and 113.6MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-13 14:31:14,784 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 161.5MB. Free memory was 135.3MB in the beginning and 135.3MB in the end (delta: 25.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 175.15ms. Allocated memory is still 161.5MB. Free memory was 125.2MB in the beginning and 113.6MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 159]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 --- 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-2329fc7 [2022-12-13 14:31:16,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:31:16,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:31:16,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:31:16,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:31:16,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:31:16,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:31:16,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:31:16,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:31:16,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:31:16,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:31:16,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:31:16,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:31:16,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:31:16,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:31:16,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:31:16,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:31:16,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:31:16,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:31:16,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:31:16,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:31:16,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:31:16,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:31:16,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:31:16,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:31:16,157 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:31:16,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:31:16,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:31:16,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:31:16,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:31:16,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:31:16,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:31:16,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:31:16,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:31:16,163 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:31:16,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:31:16,170 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:31:16,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:31:16,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:31:16,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:31:16,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:31:16,173 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 14:31:16,196 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:31:16,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:31:16,196 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:31:16,196 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:31:16,197 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:31:16,197 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:31:16,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:31:16,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:31:16,198 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:31:16,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:31:16,199 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:31:16,199 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 14:31:16,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:31:16,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:31:16,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:31:16,200 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 14:31:16,200 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 14:31:16,200 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 14:31:16,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:31:16,200 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 14:31:16,201 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 14:31:16,201 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 14:31:16,201 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:31:16,201 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:31:16,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:31:16,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:31:16,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:31:16,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:31:16,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:31:16,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:31:16,203 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 14:31:16,203 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 14:31:16,203 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:31:16,203 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:31:16,203 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:31:16,203 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 14:31:16,204 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:31:16,204 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_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 [2022-12-13 14:31:16,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:31:16,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:31:16,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:31:16,426 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:31:16,426 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:31:16,427 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-12-13 14:31:18,999 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:31:19,146 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:31:19,147 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-12-13 14:31:19,154 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/data/91ea6145f/da53b3a4da604138bbf821968ce6f340/FLAG71a7b3f35 [2022-12-13 14:31:19,166 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/data/91ea6145f/da53b3a4da604138bbf821968ce6f340 [2022-12-13 14:31:19,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:31:19,169 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:31:19,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:31:19,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:31:19,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:31:19,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:31:19" (1/1) ... [2022-12-13 14:31:19,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76b657ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:19, skipping insertion in model container [2022-12-13 14:31:19,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:31:19" (1/1) ... [2022-12-13 14:31:19,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:31:19,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:31:19,327 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,329 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,329 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,332 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,333 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,334 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,336 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,337 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,337 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,339 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,339 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,339 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,341 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,341 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,342 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,343 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,344 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,345 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,346 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,347 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,347 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,349 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,349 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,350 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,361 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_d079c832-f3ef-4b24-9703-6f76ddafcb22/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-12-13 14:31:19,373 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:31:19,384 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 14:31:19,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:31:19,394 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,395 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,395 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,396 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,397 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,397 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,398 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,399 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,399 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,400 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,400 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,401 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,402 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,402 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,403 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,404 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,404 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,405 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,406 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,407 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,407 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,408 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,409 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,409 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,415 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_d079c832-f3ef-4b24-9703-6f76ddafcb22/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-12-13 14:31:19,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:31:19,425 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:31:19,437 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,438 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,438 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,439 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,439 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,440 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,441 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,441 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,441 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,442 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,442 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,443 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,444 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,451 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,451 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,452 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,453 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,453 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,454 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,455 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,455 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,456 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,456 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:31:19,456 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:31:19,462 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_d079c832-f3ef-4b24-9703-6f76ddafcb22/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-12-13 14:31:19,471 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:31:19,487 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:31:19,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:19 WrapperNode [2022-12-13 14:31:19,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:31:19,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:31:19,488 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:31:19,488 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:31:19,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:19" (1/1) ... [2022-12-13 14:31:19,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:19" (1/1) ... [2022-12-13 14:31:19,521 INFO L138 Inliner]: procedures = 28, calls = 75, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 302 [2022-12-13 14:31:19,522 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:31:19,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:31:19,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:31:19,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:31:19,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:19" (1/1) ... [2022-12-13 14:31:19,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:19" (1/1) ... [2022-12-13 14:31:19,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:19" (1/1) ... [2022-12-13 14:31:19,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:19" (1/1) ... [2022-12-13 14:31:19,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:19" (1/1) ... [2022-12-13 14:31:19,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:19" (1/1) ... [2022-12-13 14:31:19,544 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:19" (1/1) ... [2022-12-13 14:31:19,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:19" (1/1) ... [2022-12-13 14:31:19,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:31:19,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:31:19,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:31:19,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:31:19,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:19" (1/1) ... [2022-12-13 14:31:19,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:31:19,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:31:19,571 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:31:19,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:31:19,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:31:19,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 14:31:19,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 14:31:19,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 14:31:19,606 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 14:31:19,606 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 14:31:19,606 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 14:31:19,606 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 14:31:19,606 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 14:31:19,606 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 14:31:19,607 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-13 14:31:19,607 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-13 14:31:19,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 14:31:19,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 14:31:19,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 14:31:19,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:31:19,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:31:19,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:31:19,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 14:31:19,609 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 14:31:19,705 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:31:19,706 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:31:20,299 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:31:20,427 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:31:20,427 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 14:31:20,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:31:20 BoogieIcfgContainer [2022-12-13 14:31:20,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:31:20,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:31:20,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:31:20,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:31:20,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:31:19" (1/3) ... [2022-12-13 14:31:20,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@714c2ba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:31:20, skipping insertion in model container [2022-12-13 14:31:20,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:19" (2/3) ... [2022-12-13 14:31:20,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@714c2ba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:31:20, skipping insertion in model container [2022-12-13 14:31:20,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:31:20" (3/3) ... [2022-12-13 14:31:20,435 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2022-12-13 14:31:20,448 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:31:20,448 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-12-13 14:31:20,448 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 14:31:20,516 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 14:31:20,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 260 places, 266 transitions, 564 flow [2022-12-13 14:31:20,605 INFO L130 PetriNetUnfolder]: 19/262 cut-off events. [2022-12-13 14:31:20,605 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 14:31:20,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 262 events. 19/262 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 213 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 210. Up to 2 conditions per place. [2022-12-13 14:31:20,610 INFO L82 GeneralOperation]: Start removeDead. Operand has 260 places, 266 transitions, 564 flow [2022-12-13 14:31:20,615 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 251 places, 257 transitions, 538 flow [2022-12-13 14:31:20,617 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:31:20,625 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 251 places, 257 transitions, 538 flow [2022-12-13 14:31:20,627 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 251 places, 257 transitions, 538 flow [2022-12-13 14:31:20,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 257 transitions, 538 flow [2022-12-13 14:31:20,665 INFO L130 PetriNetUnfolder]: 19/257 cut-off events. [2022-12-13 14:31:20,665 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 14:31:20,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 257 events. 19/257 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 213 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 210. Up to 2 conditions per place. [2022-12-13 14:31:20,667 INFO L119 LiptonReduction]: Number of co-enabled transitions 3160 [2022-12-13 14:31:46,243 WARN L233 SmtUtils]: Spent 7.04s on a formula simplification. DAG size of input: 146 DAG size of output: 145 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 14:31:54,908 WARN L233 SmtUtils]: Spent 7.42s on a formula simplification. DAG size of input: 149 DAG size of output: 148 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 14:31:58,662 INFO L134 LiptonReduction]: Checked pairs total: 5554 [2022-12-13 14:31:58,662 INFO L136 LiptonReduction]: Total number of compositions: 266 [2022-12-13 14:31:58,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:31:58,674 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@46161bf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:31:58,674 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-12-13 14:31:58,676 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 14:31:58,676 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:31:58,676 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:31:58,677 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 14:31:58,677 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:31:58,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:31:58,681 INFO L85 PathProgramCache]: Analyzing trace with hash 39755, now seen corresponding path program 1 times [2022-12-13 14:31:58,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:31:58,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165445135] [2022-12-13 14:31:58,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:31:58,692 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:31:58,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:31:58,693 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:31:58,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-13 14:31:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:31:58,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:31:58,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:31:59,033 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 14:31:59,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 14:31:59,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:31:59,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:31:59,076 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:31:59,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165445135] [2022-12-13 14:31:59,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165445135] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:31:59,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:31:59,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:31:59,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255682035] [2022-12-13 14:31:59,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:31:59,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:31:59,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:31:59,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:31:59,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:31:59,310 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 532 [2022-12-13 14:31:59,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:31:59,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:31:59,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 532 [2022-12-13 14:31:59,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:32:03,353 INFO L130 PetriNetUnfolder]: 31228/39023 cut-off events. [2022-12-13 14:32:03,353 INFO L131 PetriNetUnfolder]: For 324/324 co-relation queries the response was YES. [2022-12-13 14:32:03,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78387 conditions, 39023 events. 31228/39023 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 2686. Compared 207755 event pairs, 20215 based on Foata normal form. 0/10691 useless extension candidates. Maximal degree in co-relation 34221. Up to 19215 conditions per place. [2022-12-13 14:32:03,546 INFO L137 encePairwiseOnDemand]: 525/532 looper letters, 107 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2022-12-13 14:32:03,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 117 transitions, 504 flow [2022-12-13 14:32:03,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:32:03,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:32:03,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 775 transitions. [2022-12-13 14:32:03,558 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4855889724310777 [2022-12-13 14:32:03,559 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 775 transitions. [2022-12-13 14:32:03,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 775 transitions. [2022-12-13 14:32:03,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:32:03,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 775 transitions. [2022-12-13 14:32:03,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:03,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:03,575 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:03,576 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 152 flow. Second operand 3 states and 775 transitions. [2022-12-13 14:32:03,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 117 transitions, 504 flow [2022-12-13 14:32:03,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 117 transitions, 472 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-13 14:32:03,636 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 166 flow [2022-12-13 14:32:03,638 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2022-12-13 14:32:03,641 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -5 predicate places. [2022-12-13 14:32:03,641 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 166 flow [2022-12-13 14:32:03,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:03,642 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:32:03,642 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 14:32:03,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:32:03,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:32:03,844 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:32:03,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:32:03,846 INFO L85 PathProgramCache]: Analyzing trace with hash 39754, now seen corresponding path program 1 times [2022-12-13 14:32:03,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:32:03,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043276672] [2022-12-13 14:32:03,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:32:03,849 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:32:03,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:32:03,853 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:32:03,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-13 14:32:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:32:03,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:32:03,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:32:04,135 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-13 14:32:04,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-13 14:32:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:32:04,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:32:04,152 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:32:04,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043276672] [2022-12-13 14:32:04,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043276672] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:32:04,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:32:04,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:32:04,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488041542] [2022-12-13 14:32:04,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:32:04,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:32:04,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:32:04,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:32:04,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:32:04,275 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 532 [2022-12-13 14:32:04,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:04,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:32:04,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 532 [2022-12-13 14:32:04,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:32:07,546 INFO L130 PetriNetUnfolder]: 31233/39019 cut-off events. [2022-12-13 14:32:07,546 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:32:07,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77777 conditions, 39019 events. 31233/39019 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2686. Compared 208212 event pairs, 20218 based on Foata normal form. 2/10239 useless extension candidates. Maximal degree in co-relation 38877. Up to 38429 conditions per place. [2022-12-13 14:32:07,708 INFO L137 encePairwiseOnDemand]: 529/532 looper letters, 57 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2022-12-13 14:32:07,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 64 transitions, 278 flow [2022-12-13 14:32:07,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:32:07,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:32:07,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 717 transitions. [2022-12-13 14:32:07,763 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4492481203007519 [2022-12-13 14:32:07,763 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 717 transitions. [2022-12-13 14:32:07,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 717 transitions. [2022-12-13 14:32:07,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:32:07,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 717 transitions. [2022-12-13 14:32:07,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:07,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:07,767 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:07,768 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 166 flow. Second operand 3 states and 717 transitions. [2022-12-13 14:32:07,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 64 transitions, 278 flow [2022-12-13 14:32:07,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 64 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:32:07,769 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 156 flow [2022-12-13 14:32:07,769 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2022-12-13 14:32:07,770 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2022-12-13 14:32:07,770 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 156 flow [2022-12-13 14:32:07,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:07,770 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:32:07,770 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 14:32:07,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-12-13 14:32:07,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:32:07,972 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:32:07,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:32:07,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1238983, now seen corresponding path program 1 times [2022-12-13 14:32:07,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:32:07,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221878052] [2022-12-13 14:32:07,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:32:07,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:32:07,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:32:07,979 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:32:07,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-13 14:32:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:32:08,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 14:32:08,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:32:08,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:32:08,228 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-12-13 14:32:08,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-12-13 14:32:08,580 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-12-13 14:32:08,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2022-12-13 14:32:08,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:32:08,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:32:08,659 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:32:08,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221878052] [2022-12-13 14:32:08,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221878052] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:32:08,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:32:08,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:32:08,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006515576] [2022-12-13 14:32:08,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:32:08,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:32:08,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:32:08,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:32:08,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:32:08,954 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 532 [2022-12-13 14:32:08,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:08,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:32:08,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 532 [2022-12-13 14:32:08,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:32:12,070 INFO L130 PetriNetUnfolder]: 25233/31767 cut-off events. [2022-12-13 14:32:12,070 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:32:12,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63270 conditions, 31767 events. 25233/31767 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2090. Compared 168930 event pairs, 16218 based on Foata normal form. 0/8985 useless extension candidates. Maximal degree in co-relation 63262. Up to 31177 conditions per place. [2022-12-13 14:32:12,211 INFO L137 encePairwiseOnDemand]: 529/532 looper letters, 55 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2022-12-13 14:32:12,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 62 transitions, 264 flow [2022-12-13 14:32:12,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:32:12,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:32:12,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 724 transitions. [2022-12-13 14:32:12,213 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45363408521303256 [2022-12-13 14:32:12,213 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 724 transitions. [2022-12-13 14:32:12,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 724 transitions. [2022-12-13 14:32:12,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:32:12,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 724 transitions. [2022-12-13 14:32:12,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:12,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:12,217 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:12,217 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 156 flow. Second operand 3 states and 724 transitions. [2022-12-13 14:32:12,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 62 transitions, 264 flow [2022-12-13 14:32:12,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 62 transitions, 263 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:32:12,219 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 153 flow [2022-12-13 14:32:12,219 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2022-12-13 14:32:12,219 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -8 predicate places. [2022-12-13 14:32:12,219 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 153 flow [2022-12-13 14:32:12,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:12,220 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:32:12,220 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 14:32:12,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-12-13 14:32:12,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:32:12,422 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:32:12,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:32:12,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1238984, now seen corresponding path program 1 times [2022-12-13 14:32:12,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:32:12,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062328268] [2022-12-13 14:32:12,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:32:12,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:32:12,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:32:12,428 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:32:12,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-13 14:32:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:32:12,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 14:32:12,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:32:12,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:32:12,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:32:12,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:32:12,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:32:12,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:32:12,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:32:12,680 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-12-13 14:32:12,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2022-12-13 14:32:12,732 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2022-12-13 14:32:12,732 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 148 treesize of output 145 [2022-12-13 14:32:12,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:32:12,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-12-13 14:32:12,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:32:12,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:32:12,850 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:32:12,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062328268] [2022-12-13 14:32:12,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062328268] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:32:12,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:32:12,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:32:12,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323439844] [2022-12-13 14:32:12,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:32:12,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:32:12,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:32:12,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:32:12,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:32:13,094 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 532 [2022-12-13 14:32:13,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 153 flow. Second operand has 4 states, 4 states have (on average 225.75) internal successors, (903), 4 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:13,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:32:13,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 532 [2022-12-13 14:32:13,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:32:14,963 INFO L130 PetriNetUnfolder]: 19233/24515 cut-off events. [2022-12-13 14:32:14,964 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:32:15,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48767 conditions, 24515 events. 19233/24515 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1494. Compared 130782 event pairs, 12218 based on Foata normal form. 0/7735 useless extension candidates. Maximal degree in co-relation 48758. Up to 23925 conditions per place. [2022-12-13 14:32:15,111 INFO L137 encePairwiseOnDemand]: 529/532 looper letters, 53 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2022-12-13 14:32:15,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 60 transitions, 257 flow [2022-12-13 14:32:15,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:32:15,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:32:15,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 728 transitions. [2022-12-13 14:32:15,113 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45614035087719296 [2022-12-13 14:32:15,113 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 728 transitions. [2022-12-13 14:32:15,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 728 transitions. [2022-12-13 14:32:15,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:32:15,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 728 transitions. [2022-12-13 14:32:15,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:15,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:15,117 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:15,117 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 153 flow. Second operand 3 states and 728 transitions. [2022-12-13 14:32:15,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 60 transitions, 257 flow [2022-12-13 14:32:15,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 60 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:32:15,119 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 150 flow [2022-12-13 14:32:15,119 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2022-12-13 14:32:15,119 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -9 predicate places. [2022-12-13 14:32:15,119 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 150 flow [2022-12-13 14:32:15,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 225.75) internal successors, (903), 4 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:15,120 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:32:15,120 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 14:32:15,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 14:32:15,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:32:15,321 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:32:15,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:32:15,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1237564, now seen corresponding path program 1 times [2022-12-13 14:32:15,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:32:15,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480213478] [2022-12-13 14:32:15,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:32:15,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:32:15,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:32:15,323 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:32:15,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-13 14:32:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:32:15,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 14:32:15,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:32:15,530 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 14:32:15,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 14:32:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:32:15,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:32:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:32:15,763 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:32:15,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480213478] [2022-12-13 14:32:15,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480213478] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:32:15,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:32:15,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 14:32:15,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204219428] [2022-12-13 14:32:15,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:32:15,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:32:15,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:32:15,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:32:15,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:32:16,904 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 532 [2022-12-13 14:32:16,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 150 flow. Second operand has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:16,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:32:16,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 532 [2022-12-13 14:32:16,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:32:20,926 INFO L130 PetriNetUnfolder]: 28843/36779 cut-off events. [2022-12-13 14:32:20,926 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:32:20,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73144 conditions, 36779 events. 28843/36779 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2092. Compared 202506 event pairs, 18321 based on Foata normal form. 0/12024 useless extension candidates. Maximal degree in co-relation 73134. Up to 11964 conditions per place. [2022-12-13 14:32:21,075 INFO L137 encePairwiseOnDemand]: 525/532 looper letters, 140 selfloop transitions, 15 changer transitions 0/161 dead transitions. [2022-12-13 14:32:21,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 161 transitions, 696 flow [2022-12-13 14:32:21,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:32:21,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:32:21,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1421 transitions. [2022-12-13 14:32:21,078 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4451754385964912 [2022-12-13 14:32:21,078 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1421 transitions. [2022-12-13 14:32:21,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1421 transitions. [2022-12-13 14:32:21,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:32:21,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1421 transitions. [2022-12-13 14:32:21,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 236.83333333333334) internal successors, (1421), 6 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:21,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 532.0) internal successors, (3724), 7 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:21,084 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 532.0) internal successors, (3724), 7 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:21,084 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 150 flow. Second operand 6 states and 1421 transitions. [2022-12-13 14:32:21,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 161 transitions, 696 flow [2022-12-13 14:32:21,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 161 transitions, 695 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:32:21,086 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 262 flow [2022-12-13 14:32:21,087 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2022-12-13 14:32:21,087 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -1 predicate places. [2022-12-13 14:32:21,087 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 262 flow [2022-12-13 14:32:21,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:21,088 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:32:21,088 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 14:32:21,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-13 14:32:21,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:32:21,289 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:32:21,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:32:21,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1190692177, now seen corresponding path program 1 times [2022-12-13 14:32:21,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:32:21,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473497381] [2022-12-13 14:32:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:32:21,292 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:32:21,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:32:21,295 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:32:21,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-13 14:32:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:32:21,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 14:32:21,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:32:21,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:32:21,507 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-12-13 14:32:21,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 case distinctions, treesize of input 49 treesize of output 74 [2022-12-13 14:32:21,744 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-12-13 14:32:21,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 21 treesize of output 32 [2022-12-13 14:32:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:32:21,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:32:21,826 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:32:21,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473497381] [2022-12-13 14:32:21,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473497381] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:32:21,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:32:21,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:32:21,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496192628] [2022-12-13 14:32:21,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:32:21,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:32:21,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:32:21,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:32:21,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:32:22,114 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 532 [2022-12-13 14:32:22,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:22,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:32:22,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 532 [2022-12-13 14:32:22,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:32:24,908 INFO L130 PetriNetUnfolder]: 27632/35168 cut-off events. [2022-12-13 14:32:24,908 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 14:32:24,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69989 conditions, 35168 events. 27632/35168 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2046. Compared 193848 event pairs, 17418 based on Foata normal form. 0/11311 useless extension candidates. Maximal degree in co-relation 69974. Up to 34283 conditions per place. [2022-12-13 14:32:25,056 INFO L137 encePairwiseOnDemand]: 529/532 looper letters, 62 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2022-12-13 14:32:25,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 384 flow [2022-12-13 14:32:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:32:25,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:32:25,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 720 transitions. [2022-12-13 14:32:25,058 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45112781954887216 [2022-12-13 14:32:25,058 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 720 transitions. [2022-12-13 14:32:25,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 720 transitions. [2022-12-13 14:32:25,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:32:25,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 720 transitions. [2022-12-13 14:32:25,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:25,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:25,062 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:25,062 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 262 flow. Second operand 3 states and 720 transitions. [2022-12-13 14:32:25,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 384 flow [2022-12-13 14:32:25,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 365 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 14:32:25,064 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 241 flow [2022-12-13 14:32:25,064 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2022-12-13 14:32:25,064 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2022-12-13 14:32:25,065 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 241 flow [2022-12-13 14:32:25,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:25,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:32:25,065 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 14:32:25,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 14:32:25,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:32:25,267 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:32:25,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:32:25,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1190692178, now seen corresponding path program 1 times [2022-12-13 14:32:25,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:32:25,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638738116] [2022-12-13 14:32:25,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:32:25,270 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:32:25,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:32:25,273 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:32:25,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-13 14:32:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:32:25,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 14:32:25,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:32:25,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:32:25,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:32:25,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:32:25,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:32:25,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:32:25,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:32:25,528 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-12-13 14:32:25,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2022-12-13 14:32:25,552 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 14:32:25,552 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 31 treesize of output 27 [2022-12-13 14:32:25,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:32:25,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-12-13 14:32:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:32:25,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:32:25,627 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:32:25,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638738116] [2022-12-13 14:32:25,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638738116] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:32:25,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:32:25,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:32:25,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135802814] [2022-12-13 14:32:25,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:32:25,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:32:25,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:32:25,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:32:25,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:32:25,831 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 532 [2022-12-13 14:32:25,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 226.25) internal successors, (905), 4 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:25,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:32:25,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 532 [2022-12-13 14:32:25,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:32:28,437 INFO L130 PetriNetUnfolder]: 26411/33557 cut-off events. [2022-12-13 14:32:28,437 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-12-13 14:32:28,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66758 conditions, 33557 events. 26411/33557 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 1961. Compared 183443 event pairs, 16509 based on Foata normal form. 0/11008 useless extension candidates. Maximal degree in co-relation 66742. Up to 32672 conditions per place. [2022-12-13 14:32:28,608 INFO L137 encePairwiseOnDemand]: 529/532 looper letters, 60 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2022-12-13 14:32:28,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 67 transitions, 359 flow [2022-12-13 14:32:28,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:32:28,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:32:28,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 724 transitions. [2022-12-13 14:32:28,610 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45363408521303256 [2022-12-13 14:32:28,610 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 724 transitions. [2022-12-13 14:32:28,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 724 transitions. [2022-12-13 14:32:28,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:32:28,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 724 transitions. [2022-12-13 14:32:28,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:28,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:28,614 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:28,614 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 241 flow. Second operand 3 states and 724 transitions. [2022-12-13 14:32:28,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 67 transitions, 359 flow [2022-12-13 14:32:28,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 67 transitions, 358 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:32:28,616 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 238 flow [2022-12-13 14:32:28,616 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2022-12-13 14:32:28,616 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2022-12-13 14:32:28,617 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 238 flow [2022-12-13 14:32:28,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 226.25) internal successors, (905), 4 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:28,617 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:32:28,617 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 14:32:28,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-13 14:32:28,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:32:28,819 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:32:28,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:32:28,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1743254884, now seen corresponding path program 1 times [2022-12-13 14:32:28,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:32:28,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128696947] [2022-12-13 14:32:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:32:28,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:32:28,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:32:28,824 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:32:28,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-13 14:32:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:32:28,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:32:28,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:32:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:32:28,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:32:28,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:32:28,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128696947] [2022-12-13 14:32:28,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128696947] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:32:28,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:32:28,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:32:28,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041806302] [2022-12-13 14:32:28,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:32:28,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:32:28,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:32:28,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:32:28,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:32:29,017 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 532 [2022-12-13 14:32:29,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 238 flow. Second operand has 4 states, 4 states have (on average 223.25) internal successors, (893), 4 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:29,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:32:29,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 532 [2022-12-13 14:32:29,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:32:32,201 INFO L130 PetriNetUnfolder]: 30118/38833 cut-off events. [2022-12-13 14:32:32,202 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-12-13 14:32:32,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77248 conditions, 38833 events. 30118/38833 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 2251. Compared 221249 event pairs, 19170 based on Foata normal form. 0/14349 useless extension candidates. Maximal degree in co-relation 77231. Up to 32638 conditions per place. [2022-12-13 14:32:32,386 INFO L137 encePairwiseOnDemand]: 523/532 looper letters, 101 selfloop transitions, 3 changer transitions 0/110 dead transitions. [2022-12-13 14:32:32,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 110 transitions, 580 flow [2022-12-13 14:32:32,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:32:32,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:32:32,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 980 transitions. [2022-12-13 14:32:32,389 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4605263157894737 [2022-12-13 14:32:32,389 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 980 transitions. [2022-12-13 14:32:32,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 980 transitions. [2022-12-13 14:32:32,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:32:32,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 980 transitions. [2022-12-13 14:32:32,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:32,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:32,394 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:32,394 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 238 flow. Second operand 4 states and 980 transitions. [2022-12-13 14:32:32,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 110 transitions, 580 flow [2022-12-13 14:32:32,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 110 transitions, 579 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:32:32,396 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 256 flow [2022-12-13 14:32:32,397 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=256, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2022-12-13 14:32:32,397 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 0 predicate places. [2022-12-13 14:32:32,397 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 256 flow [2022-12-13 14:32:32,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 223.25) internal successors, (893), 4 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:32,398 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:32:32,398 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 14:32:32,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-12-13 14:32:32,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:32:32,599 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:32:32,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:32:32,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1781313653, now seen corresponding path program 2 times [2022-12-13 14:32:32,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:32:32,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622465530] [2022-12-13 14:32:32,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:32:32,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:32:32,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:32:32,606 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:32:32,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-13 14:32:32,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:32:32,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:32:32,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 14:32:32,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:32:32,842 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 14:32:32,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 14:32:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:32:32,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:32:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:32:33,616 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:32:33,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622465530] [2022-12-13 14:32:33,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622465530] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:32:33,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:32:33,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 14:32:33,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317732649] [2022-12-13 14:32:33,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:32:33,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 14:32:33,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:32:33,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 14:32:33,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 14:32:37,578 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 532 [2022-12-13 14:32:37,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 256 flow. Second operand has 12 states, 12 states have (on average 213.0) internal successors, (2556), 12 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:37,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:32:37,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 532 [2022-12-13 14:32:37,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:32:40,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:32:43,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:32:45,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:32:47,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:32:50,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:33:04,179 INFO L130 PetriNetUnfolder]: 90423/116559 cut-off events. [2022-12-13 14:33:04,179 INFO L131 PetriNetUnfolder]: For 10104/10104 co-relation queries the response was YES. [2022-12-13 14:33:04,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263137 conditions, 116559 events. 90423/116559 cut-off events. For 10104/10104 co-relation queries the response was YES. Maximal size of possible extension queue 5185. Compared 732913 event pairs, 57537 based on Foata normal form. 16/53654 useless extension candidates. Maximal degree in co-relation 263118. Up to 31375 conditions per place. [2022-12-13 14:33:04,783 INFO L137 encePairwiseOnDemand]: 525/532 looper letters, 374 selfloop transitions, 31 changer transitions 0/411 dead transitions. [2022-12-13 14:33:04,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 411 transitions, 2010 flow [2022-12-13 14:33:04,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 14:33:04,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 14:33:04,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2960 transitions. [2022-12-13 14:33:04,789 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46365914786967416 [2022-12-13 14:33:04,789 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2960 transitions. [2022-12-13 14:33:04,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2960 transitions. [2022-12-13 14:33:04,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:33:04,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2960 transitions. [2022-12-13 14:33:04,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 246.66666666666666) internal successors, (2960), 12 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:33:04,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 532.0) internal successors, (6916), 13 states have internal predecessors, (6916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:33:04,800 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 532.0) internal successors, (6916), 13 states have internal predecessors, (6916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:33:04,800 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 256 flow. Second operand 12 states and 2960 transitions. [2022-12-13 14:33:04,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 411 transitions, 2010 flow [2022-12-13 14:33:04,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 411 transitions, 2004 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 14:33:04,820 INFO L231 Difference]: Finished difference. Result has 88 places, 85 transitions, 482 flow [2022-12-13 14:33:04,820 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=482, PETRI_PLACES=88, PETRI_TRANSITIONS=85} [2022-12-13 14:33:04,820 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 17 predicate places. [2022-12-13 14:33:04,821 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 85 transitions, 482 flow [2022-12-13 14:33:04,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 213.0) internal successors, (2556), 12 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:33:04,821 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:33:04,822 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:33:04,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 14:33:05,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:33:05,023 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:33:05,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:33:05,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1793910747, now seen corresponding path program 1 times [2022-12-13 14:33:05,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:33:05,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023036491] [2022-12-13 14:33:05,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:33:05,027 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:33:05,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:33:05,031 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:33:05,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-13 14:33:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:33:05,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 14:33:05,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:33:05,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:33:05,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:33:05,355 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-12-13 14:33:05,355 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 3 case distinctions, treesize of input 18 treesize of output 53 [2022-12-13 14:33:05,374 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 84 treesize of output 82 [2022-12-13 14:33:05,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:33:05,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-12-13 14:33:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:33:05,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:33:05,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:33:05,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023036491] [2022-12-13 14:33:05,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023036491] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:33:05,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:33:05,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:33:05,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483571258] [2022-12-13 14:33:05,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:33:05,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:33:05,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:33:05,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:33:05,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:33:05,813 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 532 [2022-12-13 14:33:05,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 85 transitions, 482 flow. Second operand has 4 states, 4 states have (on average 226.75) internal successors, (907), 4 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:33:05,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:33:05,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 532 [2022-12-13 14:33:05,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:33:15,775 INFO L130 PetriNetUnfolder]: 89051/114501 cut-off events. [2022-12-13 14:33:15,775 INFO L131 PetriNetUnfolder]: For 10086/10086 co-relation queries the response was YES. [2022-12-13 14:33:16,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258811 conditions, 114501 events. 89051/114501 cut-off events. For 10086/10086 co-relation queries the response was YES. Maximal size of possible extension queue 4925. Compared 718335 event pairs, 56637 based on Foata normal form. 0/50573 useless extension candidates. Maximal degree in co-relation 258784. Up to 111387 conditions per place. [2022-12-13 14:33:16,478 INFO L137 encePairwiseOnDemand]: 529/532 looper letters, 76 selfloop transitions, 1 changer transitions 0/83 dead transitions. [2022-12-13 14:33:16,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 83 transitions, 632 flow [2022-12-13 14:33:16,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:33:16,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:33:16,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 722 transitions. [2022-12-13 14:33:16,481 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2022-12-13 14:33:16,481 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 722 transitions. [2022-12-13 14:33:16,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 722 transitions. [2022-12-13 14:33:16,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:33:16,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 722 transitions. [2022-12-13 14:33:16,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:33:16,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:33:16,484 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:33:16,484 INFO L175 Difference]: Start difference. First operand has 88 places, 85 transitions, 482 flow. Second operand 3 states and 722 transitions. [2022-12-13 14:33:16,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 83 transitions, 632 flow [2022-12-13 14:33:16,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 83 transitions, 571 flow, removed 15 selfloop flow, removed 4 redundant places. [2022-12-13 14:33:16,491 INFO L231 Difference]: Finished difference. Result has 84 places, 83 transitions, 419 flow [2022-12-13 14:33:16,491 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=419, PETRI_PLACES=84, PETRI_TRANSITIONS=83} [2022-12-13 14:33:16,492 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 13 predicate places. [2022-12-13 14:33:16,492 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 83 transitions, 419 flow [2022-12-13 14:33:16,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 226.75) internal successors, (907), 4 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:33:16,492 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:33:16,492 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:33:16,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-13 14:33:16,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:33:16,694 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:33:16,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:33:16,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1793910746, now seen corresponding path program 1 times [2022-12-13 14:33:16,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:33:16,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426388819] [2022-12-13 14:33:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:33:16,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:33:16,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:33:16,701 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:33:16,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-13 14:33:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:33:16,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 14:33:16,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:33:16,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:33:16,975 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-12-13 14:33:16,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-12-13 14:33:17,029 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 14:33:17,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 14:33:17,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:33:17,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:33:17,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:33:17,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426388819] [2022-12-13 14:33:17,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426388819] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:33:17,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:33:17,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:33:17,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984603198] [2022-12-13 14:33:17,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:33:17,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:33:17,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:33:17,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:33:17,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:33:17,224 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 532 [2022-12-13 14:33:17,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 419 flow. Second operand has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:33:17,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:33:17,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 532 [2022-12-13 14:33:17,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:33:27,797 INFO L130 PetriNetUnfolder]: 87719/112539 cut-off events. [2022-12-13 14:33:27,797 INFO L131 PetriNetUnfolder]: For 10010/10010 co-relation queries the response was YES. [2022-12-13 14:33:28,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254429 conditions, 112539 events. 87719/112539 cut-off events. For 10010/10010 co-relation queries the response was YES. Maximal size of possible extension queue 4912. Compared 701162 event pairs, 55737 based on Foata normal form. 0/50079 useless extension candidates. Maximal degree in co-relation 254401. Up to 109425 conditions per place. [2022-12-13 14:33:28,481 INFO L137 encePairwiseOnDemand]: 529/532 looper letters, 74 selfloop transitions, 1 changer transitions 0/81 dead transitions. [2022-12-13 14:33:28,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 565 flow [2022-12-13 14:33:28,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:33:28,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:33:28,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 714 transitions. [2022-12-13 14:33:28,483 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4473684210526316 [2022-12-13 14:33:28,484 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 714 transitions. [2022-12-13 14:33:28,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 714 transitions. [2022-12-13 14:33:28,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:33:28,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 714 transitions. [2022-12-13 14:33:28,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:33:28,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:33:28,488 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:33:28,488 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 419 flow. Second operand 3 states and 714 transitions. [2022-12-13 14:33:28,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 565 flow [2022-12-13 14:33:28,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 81 transitions, 564 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:33:28,494 INFO L231 Difference]: Finished difference. Result has 83 places, 81 transitions, 416 flow [2022-12-13 14:33:28,494 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=416, PETRI_PLACES=83, PETRI_TRANSITIONS=81} [2022-12-13 14:33:28,495 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 12 predicate places. [2022-12-13 14:33:28,495 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 81 transitions, 416 flow [2022-12-13 14:33:28,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:33:28,495 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:33:28,496 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:33:28,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-13 14:33:28,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:33:28,697 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:33:28,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:33:28,699 INFO L85 PathProgramCache]: Analyzing trace with hash 651915533, now seen corresponding path program 1 times [2022-12-13 14:33:28,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:33:28,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021127403] [2022-12-13 14:33:28,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:33:28,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:33:28,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:33:28,704 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:33:28,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-13 14:33:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:33:28,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 14:33:28,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:33:28,995 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 14:33:28,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 14:33:29,199 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-13 14:33:29,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-13 14:33:29,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:33:29,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2022-12-13 14:33:29,314 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 14:33:29,314 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 13 treesize of output 13 [2022-12-13 14:33:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:33:29,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:33:34,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:33:34,703 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:33:34,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021127403] [2022-12-13 14:33:34,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021127403] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:33:34,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:33:34,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 14:33:34,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379456101] [2022-12-13 14:33:34,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:33:34,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 14:33:34,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:33:34,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 14:33:34,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:33:36,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:33:41,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:33:45,360 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 532 [2022-12-13 14:33:45,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 81 transitions, 416 flow. Second operand has 8 states, 8 states have (on average 201.5) internal successors, (1612), 8 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:33:45,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:33:45,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 532 [2022-12-13 14:33:45,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:33:51,011 WARN L233 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:34:03,301 WARN L233 SmtUtils]: Spent 8.24s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:34:17,925 WARN L233 SmtUtils]: Spent 9.75s on a formula simplification. DAG size of input: 53 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:34:43,772 INFO L130 PetriNetUnfolder]: 186253/238712 cut-off events. [2022-12-13 14:34:43,772 INFO L131 PetriNetUnfolder]: For 26265/26265 co-relation queries the response was YES. [2022-12-13 14:34:44,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538129 conditions, 238712 events. 186253/238712 cut-off events. For 26265/26265 co-relation queries the response was YES. Maximal size of possible extension queue 9638. Compared 1573269 event pairs, 117387 based on Foata normal form. 0/118603 useless extension candidates. Maximal degree in co-relation 538100. Up to 94888 conditions per place. [2022-12-13 14:34:45,245 INFO L137 encePairwiseOnDemand]: 523/532 looper letters, 212 selfloop transitions, 31 changer transitions 0/249 dead transitions. [2022-12-13 14:34:45,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 249 transitions, 1496 flow [2022-12-13 14:34:45,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 14:34:45,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 14:34:45,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3203 transitions. [2022-12-13 14:34:45,252 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4013784461152882 [2022-12-13 14:34:45,252 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3203 transitions. [2022-12-13 14:34:45,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3203 transitions. [2022-12-13 14:34:45,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:34:45,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3203 transitions. [2022-12-13 14:34:45,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 213.53333333333333) internal successors, (3203), 15 states have internal predecessors, (3203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:34:45,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 532.0) internal successors, (8512), 16 states have internal predecessors, (8512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:34:45,263 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 532.0) internal successors, (8512), 16 states have internal predecessors, (8512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:34:45,263 INFO L175 Difference]: Start difference. First operand has 83 places, 81 transitions, 416 flow. Second operand 15 states and 3203 transitions. [2022-12-13 14:34:45,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 249 transitions, 1496 flow [2022-12-13 14:34:45,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 249 transitions, 1495 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:34:45,275 INFO L231 Difference]: Finished difference. Result has 102 places, 99 transitions, 665 flow [2022-12-13 14:34:45,275 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=665, PETRI_PLACES=102, PETRI_TRANSITIONS=99} [2022-12-13 14:34:45,276 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 31 predicate places. [2022-12-13 14:34:45,276 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 99 transitions, 665 flow [2022-12-13 14:34:45,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 201.5) internal successors, (1612), 8 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:34:45,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:34:45,276 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:34:45,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-13 14:34:45,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:34:45,478 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:34:45,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:34:45,479 INFO L85 PathProgramCache]: Analyzing trace with hash 651915532, now seen corresponding path program 1 times [2022-12-13 14:34:45,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:34:45,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021755746] [2022-12-13 14:34:45,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:34:45,481 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:34:45,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:34:45,484 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:34:45,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-13 14:34:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:34:45,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:34:45,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:34:45,758 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-13 14:34:45,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-13 14:34:45,788 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 14:34:45,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 14:34:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:34:45,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:34:45,812 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:34:45,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021755746] [2022-12-13 14:34:45,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021755746] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:34:45,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:34:45,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:34:45,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736291079] [2022-12-13 14:34:45,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:34:45,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:34:45,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:34:45,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:34:45,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:34:46,021 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 532 [2022-12-13 14:34:46,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 99 transitions, 665 flow. Second operand has 4 states, 4 states have (on average 219.5) internal successors, (878), 4 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:34:46,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:34:46,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 532 [2022-12-13 14:34:46,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:35:02,145 INFO L130 PetriNetUnfolder]: 115045/149796 cut-off events. [2022-12-13 14:35:02,145 INFO L131 PetriNetUnfolder]: For 102745/102745 co-relation queries the response was YES. [2022-12-13 14:35:02,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352352 conditions, 149796 events. 115045/149796 cut-off events. For 102745/102745 co-relation queries the response was YES. Maximal size of possible extension queue 6247. Compared 997864 event pairs, 73026 based on Foata normal form. 0/90504 useless extension candidates. Maximal degree in co-relation 352316. Up to 145454 conditions per place. [2022-12-13 14:35:03,163 INFO L137 encePairwiseOnDemand]: 528/532 looper letters, 79 selfloop transitions, 12 changer transitions 0/97 dead transitions. [2022-12-13 14:35:03,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 97 transitions, 839 flow [2022-12-13 14:35:03,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:35:03,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:35:03,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 915 transitions. [2022-12-13 14:35:03,165 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4299812030075188 [2022-12-13 14:35:03,166 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 915 transitions. [2022-12-13 14:35:03,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 915 transitions. [2022-12-13 14:35:03,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:35:03,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 915 transitions. [2022-12-13 14:35:03,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 228.75) internal successors, (915), 4 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:35:03,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:35:03,169 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:35:03,169 INFO L175 Difference]: Start difference. First operand has 102 places, 99 transitions, 665 flow. Second operand 4 states and 915 transitions. [2022-12-13 14:35:03,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 97 transitions, 839 flow [2022-12-13 14:35:03,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 97 transitions, 818 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 14:35:03,314 INFO L231 Difference]: Finished difference. Result has 102 places, 97 transitions, 660 flow [2022-12-13 14:35:03,314 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=660, PETRI_PLACES=102, PETRI_TRANSITIONS=97} [2022-12-13 14:35:03,314 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 31 predicate places. [2022-12-13 14:35:03,314 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 97 transitions, 660 flow [2022-12-13 14:35:03,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 219.5) internal successors, (878), 4 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:35:03,314 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:35:03,315 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:35:03,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-12-13 14:35:03,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:35:03,516 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:35:03,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:35:03,518 INFO L85 PathProgramCache]: Analyzing trace with hash -223347986, now seen corresponding path program 1 times [2022-12-13 14:35:03,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:35:03,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718105775] [2022-12-13 14:35:03,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:35:03,519 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:35:03,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:35:03,523 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:35:03,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-13 14:35:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:35:03,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 14:35:03,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:35:03,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 14:35:03,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:35:03,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:35:03,638 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:35:03,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718105775] [2022-12-13 14:35:03,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718105775] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:35:03,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:35:03,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:35:03,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217809150] [2022-12-13 14:35:03,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:35:03,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:35:03,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:35:03,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:35:03,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:35:03,995 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 532 [2022-12-13 14:35:03,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 97 transitions, 660 flow. Second operand has 4 states, 4 states have (on average 219.75) internal successors, (879), 4 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:35:03,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:35:03,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 532 [2022-12-13 14:35:03,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:35:15,878 INFO L130 PetriNetUnfolder]: 75886/100143 cut-off events. [2022-12-13 14:35:15,879 INFO L131 PetriNetUnfolder]: For 70385/70385 co-relation queries the response was YES. [2022-12-13 14:35:16,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236525 conditions, 100143 events. 75886/100143 cut-off events. For 70385/70385 co-relation queries the response was YES. Maximal size of possible extension queue 4137. Compared 661202 event pairs, 47880 based on Foata normal form. 0/64998 useless extension candidates. Maximal degree in co-relation 236488. Up to 96628 conditions per place. [2022-12-13 14:35:16,560 INFO L137 encePairwiseOnDemand]: 528/532 looper letters, 72 selfloop transitions, 17 changer transitions 0/95 dead transitions. [2022-12-13 14:35:16,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 95 transitions, 834 flow [2022-12-13 14:35:16,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:35:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:35:16,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 913 transitions. [2022-12-13 14:35:16,563 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42904135338345867 [2022-12-13 14:35:16,563 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 913 transitions. [2022-12-13 14:35:16,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 913 transitions. [2022-12-13 14:35:16,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:35:16,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 913 transitions. [2022-12-13 14:35:16,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:35:16,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:35:16,567 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:35:16,567 INFO L175 Difference]: Start difference. First operand has 102 places, 97 transitions, 660 flow. Second operand 4 states and 913 transitions. [2022-12-13 14:35:16,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 95 transitions, 834 flow [2022-12-13 14:35:16,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 95 transitions, 821 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:35:16,647 INFO L231 Difference]: Finished difference. Result has 101 places, 95 transitions, 677 flow [2022-12-13 14:35:16,647 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=677, PETRI_PLACES=101, PETRI_TRANSITIONS=95} [2022-12-13 14:35:16,647 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 30 predicate places. [2022-12-13 14:35:16,647 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 95 transitions, 677 flow [2022-12-13 14:35:16,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 219.75) internal successors, (879), 4 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:35:16,648 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:35:16,648 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:35:16,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-12-13 14:35:16,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:35:16,849 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:35:16,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:35:16,850 INFO L85 PathProgramCache]: Analyzing trace with hash -223347985, now seen corresponding path program 1 times [2022-12-13 14:35:16,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:35:16,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225889377] [2022-12-13 14:35:16,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:35:16,853 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:35:16,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:35:16,856 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:35:16,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-13 14:35:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:35:16,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:35:16,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:35:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:35:17,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:35:17,008 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:35:17,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225889377] [2022-12-13 14:35:17,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225889377] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:35:17,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:35:17,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:35:17,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391983146] [2022-12-13 14:35:17,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:35:17,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:35:17,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:35:17,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:35:17,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:35:17,099 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 532 [2022-12-13 14:35:17,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 95 transitions, 677 flow. Second operand has 4 states, 4 states have (on average 223.75) internal successors, (895), 4 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:35:17,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:35:17,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 532 [2022-12-13 14:35:17,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:35:29,502 INFO L130 PetriNetUnfolder]: 69419/92061 cut-off events. [2022-12-13 14:35:29,502 INFO L131 PetriNetUnfolder]: For 65004/65004 co-relation queries the response was YES. [2022-12-13 14:35:29,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217634 conditions, 92061 events. 69419/92061 cut-off events. For 65004/65004 co-relation queries the response was YES. Maximal size of possible extension queue 3880. Compared 605918 event pairs, 44001 based on Foata normal form. 0/63628 useless extension candidates. Maximal degree in co-relation 217597. Up to 85950 conditions per place. [2022-12-13 14:35:30,103 INFO L137 encePairwiseOnDemand]: 525/532 looper letters, 101 selfloop transitions, 18 changer transitions 0/125 dead transitions. [2022-12-13 14:35:30,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 125 transitions, 1020 flow [2022-12-13 14:35:30,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:35:30,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:35:30,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 961 transitions. [2022-12-13 14:35:30,106 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4515977443609023 [2022-12-13 14:35:30,106 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 961 transitions. [2022-12-13 14:35:30,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 961 transitions. [2022-12-13 14:35:30,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:35:30,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 961 transitions. [2022-12-13 14:35:30,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 240.25) internal successors, (961), 4 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:35:30,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:35:30,110 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:35:30,110 INFO L175 Difference]: Start difference. First operand has 101 places, 95 transitions, 677 flow. Second operand 4 states and 961 transitions. [2022-12-13 14:35:30,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 125 transitions, 1020 flow [2022-12-13 14:35:30,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 125 transitions, 1000 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:35:30,179 INFO L231 Difference]: Finished difference. Result has 104 places, 97 transitions, 748 flow [2022-12-13 14:35:30,179 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=748, PETRI_PLACES=104, PETRI_TRANSITIONS=97} [2022-12-13 14:35:30,180 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 33 predicate places. [2022-12-13 14:35:30,180 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 97 transitions, 748 flow [2022-12-13 14:35:30,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 223.75) internal successors, (895), 4 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:35:30,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:35:30,180 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:35:30,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-12-13 14:35:30,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:35:30,381 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:35:30,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:35:30,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1666373679, now seen corresponding path program 1 times [2022-12-13 14:35:30,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:35:30,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987448079] [2022-12-13 14:35:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:35:30,384 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:35:30,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:35:30,388 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:35:30,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-13 14:35:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:35:30,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 14:35:30,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:35:30,593 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-12-13 14:35:30,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 55 [2022-12-13 14:35:30,630 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 14:35:30,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 14:35:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:35:30,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:35:30,652 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:35:30,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987448079] [2022-12-13 14:35:30,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987448079] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:35:30,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:35:30,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:35:30,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392451694] [2022-12-13 14:35:30,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:35:30,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:35:30,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:35:30,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:35:30,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:35:30,807 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 532 [2022-12-13 14:35:30,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 97 transitions, 748 flow. Second operand has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:35:30,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:35:30,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 532 [2022-12-13 14:35:30,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:35:40,250 INFO L130 PetriNetUnfolder]: 64793/85911 cut-off events. [2022-12-13 14:35:40,250 INFO L131 PetriNetUnfolder]: For 70515/70515 co-relation queries the response was YES. [2022-12-13 14:35:40,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226939 conditions, 85911 events. 64793/85911 cut-off events. For 70515/70515 co-relation queries the response was YES. Maximal size of possible extension queue 3695. Compared 565754 event pairs, 41183 based on Foata normal form. 0/68374 useless extension candidates. Maximal degree in co-relation 226901. Up to 82714 conditions per place. [2022-12-13 14:35:41,091 INFO L137 encePairwiseOnDemand]: 529/532 looper letters, 88 selfloop transitions, 1 changer transitions 0/95 dead transitions. [2022-12-13 14:35:41,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 95 transitions, 922 flow [2022-12-13 14:35:41,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:35:41,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:35:41,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 702 transitions. [2022-12-13 14:35:41,093 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4398496240601504 [2022-12-13 14:35:41,093 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 702 transitions. [2022-12-13 14:35:41,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 702 transitions. [2022-12-13 14:35:41,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:35:41,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 702 transitions. [2022-12-13 14:35:41,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:35:41,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:35:41,095 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:35:41,096 INFO L175 Difference]: Start difference. First operand has 104 places, 97 transitions, 748 flow. Second operand 3 states and 702 transitions. [2022-12-13 14:35:41,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 95 transitions, 922 flow [2022-12-13 14:35:41,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 95 transitions, 879 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-12-13 14:35:41,175 INFO L231 Difference]: Finished difference. Result has 102 places, 95 transitions, 703 flow [2022-12-13 14:35:41,175 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=703, PETRI_PLACES=102, PETRI_TRANSITIONS=95} [2022-12-13 14:35:41,175 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 31 predicate places. [2022-12-13 14:35:41,175 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 95 transitions, 703 flow [2022-12-13 14:35:41,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:35:41,175 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:35:41,175 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:35:41,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-12-13 14:35:41,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:35:41,377 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:35:41,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:35:41,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1805439822, now seen corresponding path program 1 times [2022-12-13 14:35:41,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:35:41,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458640000] [2022-12-13 14:35:41,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:35:41,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:35:41,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:35:41,383 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:35:41,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-13 14:35:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:35:41,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 14:35:41,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:35:41,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 14:35:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:35:41,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:35:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:35:42,804 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:35:42,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458640000] [2022-12-13 14:35:42,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458640000] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:35:42,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:35:42,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-13 14:35:42,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420116872] [2022-12-13 14:35:42,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:35:42,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 14:35:42,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:35:42,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 14:35:42,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:35:45,337 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 532 [2022-12-13 14:35:45,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 95 transitions, 703 flow. Second operand has 8 states, 8 states have (on average 207.875) internal successors, (1663), 8 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:35:45,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:35:45,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 532 [2022-12-13 14:35:45,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:35:59,771 INFO L130 PetriNetUnfolder]: 54868/73310 cut-off events. [2022-12-13 14:35:59,771 INFO L131 PetriNetUnfolder]: For 61578/61578 co-relation queries the response was YES. [2022-12-13 14:36:00,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191876 conditions, 73310 events. 54868/73310 cut-off events. For 61578/61578 co-relation queries the response was YES. Maximal size of possible extension queue 3013. Compared 478197 event pairs, 34775 based on Foata normal form. 0/64296 useless extension candidates. Maximal degree in co-relation 191838. Up to 50124 conditions per place. [2022-12-13 14:36:00,251 INFO L137 encePairwiseOnDemand]: 525/532 looper letters, 130 selfloop transitions, 43 changer transitions 0/179 dead transitions. [2022-12-13 14:36:00,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 179 transitions, 1328 flow [2022-12-13 14:36:00,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 14:36:00,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 14:36:00,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2191 transitions. [2022-12-13 14:36:00,257 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4118421052631579 [2022-12-13 14:36:00,257 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2191 transitions. [2022-12-13 14:36:00,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2191 transitions. [2022-12-13 14:36:00,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:36:00,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2191 transitions. [2022-12-13 14:36:00,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 219.1) internal successors, (2191), 10 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:36:00,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 532.0) internal successors, (5852), 11 states have internal predecessors, (5852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:36:00,264 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 532.0) internal successors, (5852), 11 states have internal predecessors, (5852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:36:00,264 INFO L175 Difference]: Start difference. First operand has 102 places, 95 transitions, 703 flow. Second operand 10 states and 2191 transitions. [2022-12-13 14:36:00,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 179 transitions, 1328 flow [2022-12-13 14:36:00,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 179 transitions, 1327 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:36:00,332 INFO L231 Difference]: Finished difference. Result has 112 places, 97 transitions, 829 flow [2022-12-13 14:36:00,332 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=829, PETRI_PLACES=112, PETRI_TRANSITIONS=97} [2022-12-13 14:36:00,332 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 41 predicate places. [2022-12-13 14:36:00,332 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 97 transitions, 829 flow [2022-12-13 14:36:00,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 207.875) internal successors, (1663), 8 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:36:00,332 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:36:00,333 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:36:00,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-13 14:36:00,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:36:00,534 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:36:00,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:36:00,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1666373678, now seen corresponding path program 1 times [2022-12-13 14:36:00,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:36:00,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965128261] [2022-12-13 14:36:00,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:36:00,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:36:00,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:36:00,536 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:36:00,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-13 14:36:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:36:00,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 14:36:00,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:36:00,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:36:00,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:36:00,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:36:00,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:36:00,863 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 14:36:00,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 47 [2022-12-13 14:36:00,873 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 22 treesize of output 20 [2022-12-13 14:36:00,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:36:00,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-12-13 14:36:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:36:01,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:36:01,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:36:01,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965128261] [2022-12-13 14:36:01,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965128261] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:36:01,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:36:01,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:36:01,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956571053] [2022-12-13 14:36:01,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:36:01,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:36:01,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:36:01,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:36:01,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:36:01,303 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 532 [2022-12-13 14:36:01,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 97 transitions, 829 flow. Second operand has 4 states, 4 states have (on average 225.25) internal successors, (901), 4 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:36:01,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:36:01,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 532 [2022-12-13 14:36:01,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:36:09,677 INFO L130 PetriNetUnfolder]: 50710/67754 cut-off events. [2022-12-13 14:36:09,678 INFO L131 PetriNetUnfolder]: For 94401/94401 co-relation queries the response was YES. [2022-12-13 14:36:09,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191786 conditions, 67754 events. 50710/67754 cut-off events. For 94401/94401 co-relation queries the response was YES. Maximal size of possible extension queue 2903. Compared 441937 event pairs, 32239 based on Foata normal form. 0/63846 useless extension candidates. Maximal degree in co-relation 191746. Up to 64851 conditions per place. [2022-12-13 14:36:10,389 INFO L137 encePairwiseOnDemand]: 529/532 looper letters, 88 selfloop transitions, 1 changer transitions 0/95 dead transitions. [2022-12-13 14:36:10,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 95 transitions, 1003 flow [2022-12-13 14:36:10,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:36:10,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:36:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 706 transitions. [2022-12-13 14:36:10,392 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4423558897243108 [2022-12-13 14:36:10,392 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 706 transitions. [2022-12-13 14:36:10,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 706 transitions. [2022-12-13 14:36:10,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:36:10,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 706 transitions. [2022-12-13 14:36:10,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 235.33333333333334) internal successors, (706), 3 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:36:10,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:36:10,394 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:36:10,394 INFO L175 Difference]: Start difference. First operand has 112 places, 97 transitions, 829 flow. Second operand 3 states and 706 transitions. [2022-12-13 14:36:10,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 95 transitions, 1003 flow [2022-12-13 14:36:10,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 95 transitions, 895 flow, removed 20 selfloop flow, removed 5 redundant places. [2022-12-13 14:36:10,496 INFO L231 Difference]: Finished difference. Result has 107 places, 95 transitions, 719 flow [2022-12-13 14:36:10,496 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=719, PETRI_PLACES=107, PETRI_TRANSITIONS=95} [2022-12-13 14:36:10,497 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 36 predicate places. [2022-12-13 14:36:10,497 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 95 transitions, 719 flow [2022-12-13 14:36:10,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 225.25) internal successors, (901), 4 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:36:10,497 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:36:10,497 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 14:36:10,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-13 14:36:10,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:36:10,698 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:36:10,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:36:10,700 INFO L85 PathProgramCache]: Analyzing trace with hash -520708388, now seen corresponding path program 2 times [2022-12-13 14:36:10,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:36:10,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26637216] [2022-12-13 14:36:10,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:36:10,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:36:10,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:36:10,704 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:36:10,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-13 14:36:10,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 14:36:10,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:36:10,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 14:36:10,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:36:11,106 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 14:36:11,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 14:36:11,379 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-13 14:36:11,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-13 14:36:11,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:36:11,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2022-12-13 14:36:11,551 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 14:36:11,551 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 13 treesize of output 13 [2022-12-13 14:36:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 14:36:11,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:36:11,604 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:36:11,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26637216] [2022-12-13 14:36:11,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26637216] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:36:11,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:36:11,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:36:11,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959046011] [2022-12-13 14:36:11,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:36:11,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:36:11,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:36:11,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:36:11,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:36:12,108 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 532 [2022-12-13 14:36:12,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 95 transitions, 719 flow. Second operand has 4 states, 4 states have (on average 213.5) internal successors, (854), 4 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:36:12,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:36:12,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 532 [2022-12-13 14:36:12,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:36:19,653 INFO L130 PetriNetUnfolder]: 37828/51031 cut-off events. [2022-12-13 14:36:19,653 INFO L131 PetriNetUnfolder]: For 74068/74068 co-relation queries the response was YES. [2022-12-13 14:36:19,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135637 conditions, 51031 events. 37828/51031 cut-off events. For 74068/74068 co-relation queries the response was YES. Maximal size of possible extension queue 2230. Compared 329367 event pairs, 24177 based on Foata normal form. 2658/50759 useless extension candidates. Maximal degree in co-relation 135597. Up to 48828 conditions per place. [2022-12-13 14:36:20,045 INFO L137 encePairwiseOnDemand]: 528/532 looper letters, 75 selfloop transitions, 12 changer transitions 0/93 dead transitions. [2022-12-13 14:36:20,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 93 transitions, 873 flow [2022-12-13 14:36:20,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:36:20,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:36:20,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 883 transitions. [2022-12-13 14:36:20,048 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4149436090225564 [2022-12-13 14:36:20,048 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 883 transitions. [2022-12-13 14:36:20,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 883 transitions. [2022-12-13 14:36:20,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:36:20,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 883 transitions. [2022-12-13 14:36:20,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 220.75) internal successors, (883), 4 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:36:20,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:36:20,051 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:36:20,051 INFO L175 Difference]: Start difference. First operand has 107 places, 95 transitions, 719 flow. Second operand 4 states and 883 transitions. [2022-12-13 14:36:20,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 93 transitions, 873 flow [2022-12-13 14:36:20,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 93 transitions, 865 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 14:36:20,106 INFO L231 Difference]: Finished difference. Result has 105 places, 93 transitions, 715 flow [2022-12-13 14:36:20,106 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=715, PETRI_PLACES=105, PETRI_TRANSITIONS=93} [2022-12-13 14:36:20,107 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 34 predicate places. [2022-12-13 14:36:20,107 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 93 transitions, 715 flow [2022-12-13 14:36:20,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 213.5) internal successors, (854), 4 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:36:20,107 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:36:20,107 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:36:20,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-13 14:36:20,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:36:20,309 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:36:20,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:36:20,310 INFO L85 PathProgramCache]: Analyzing trace with hash 861051567, now seen corresponding path program 2 times [2022-12-13 14:36:20,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:36:20,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348094106] [2022-12-13 14:36:20,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:36:20,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:36:20,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:36:20,315 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:36:20,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-13 14:36:20,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 14:36:20,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:36:20,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 14:36:20,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:36:20,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 14:36:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 14:36:20,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:36:20,557 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:36:20,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348094106] [2022-12-13 14:36:20,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348094106] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:36:20,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:36:20,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:36:20,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90906420] [2022-12-13 14:36:20,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:36:20,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:36:20,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:36:20,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:36:20,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:36:21,003 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 532 [2022-12-13 14:36:21,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 93 transitions, 715 flow. Second operand has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:36:21,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:36:21,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 532 [2022-12-13 14:36:21,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:36:25,755 INFO L130 PetriNetUnfolder]: 24873/34356 cut-off events. [2022-12-13 14:36:25,755 INFO L131 PetriNetUnfolder]: For 38210/38210 co-relation queries the response was YES. [2022-12-13 14:36:25,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80807 conditions, 34356 events. 24873/34356 cut-off events. For 38210/38210 co-relation queries the response was YES. Maximal size of possible extension queue 1467. Compared 222520 event pairs, 15822 based on Foata normal form. 4225/36721 useless extension candidates. Maximal degree in co-relation 80768. Up to 32508 conditions per place. [2022-12-13 14:36:25,939 INFO L137 encePairwiseOnDemand]: 528/532 looper letters, 54 selfloop transitions, 31 changer transitions 0/91 dead transitions. [2022-12-13 14:36:25,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 91 transitions, 869 flow [2022-12-13 14:36:25,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:36:25,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:36:25,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 905 transitions. [2022-12-13 14:36:25,942 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42528195488721804 [2022-12-13 14:36:25,942 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 905 transitions. [2022-12-13 14:36:25,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 905 transitions. [2022-12-13 14:36:25,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:36:25,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 905 transitions. [2022-12-13 14:36:25,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 226.25) internal successors, (905), 4 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:36:25,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:36:25,945 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:36:25,945 INFO L175 Difference]: Start difference. First operand has 105 places, 93 transitions, 715 flow. Second operand 4 states and 905 transitions. [2022-12-13 14:36:25,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 91 transitions, 869 flow [2022-12-13 14:36:25,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 91 transitions, 846 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 14:36:25,954 INFO L231 Difference]: Finished difference. Result has 102 places, 91 transitions, 738 flow [2022-12-13 14:36:25,954 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=738, PETRI_PLACES=102, PETRI_TRANSITIONS=91} [2022-12-13 14:36:25,954 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 31 predicate places. [2022-12-13 14:36:25,954 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 91 transitions, 738 flow [2022-12-13 14:36:25,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:36:25,954 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:36:25,955 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 1, 1, 1] [2022-12-13 14:36:25,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-13 14:36:26,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:36:26,156 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:36:26,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:36:26,157 INFO L85 PathProgramCache]: Analyzing trace with hash -279630204, now seen corresponding path program 1 times [2022-12-13 14:36:26,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:36:26,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586862085] [2022-12-13 14:36:26,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:36:26,158 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:36:26,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:36:26,161 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:36:26,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-13 14:36:26,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:36:26,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 14:36:26,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:36:26,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 14:36:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:36:26,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:36:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:36:29,515 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:36:29,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586862085] [2022-12-13 14:36:29,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586862085] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:36:29,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:36:29,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-12-13 14:36:29,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666267881] [2022-12-13 14:36:29,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:36:29,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 14:36:29,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:36:29,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 14:36:29,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2022-12-13 14:36:50,914 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 532 [2022-12-13 14:36:50,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 91 transitions, 738 flow. Second operand has 22 states, 22 states have (on average 211.04545454545453) internal successors, (4643), 22 states have internal predecessors, (4643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:36:50,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:36:50,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 532 [2022-12-13 14:36:50,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:37:00,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:37:02,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:37:04,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:37:06,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:37:08,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:37:10,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:37:11,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:37:13,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:37:15,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:37:45,716 INFO L130 PetriNetUnfolder]: 62206/85661 cut-off events. [2022-12-13 14:37:45,716 INFO L131 PetriNetUnfolder]: For 32788/32788 co-relation queries the response was YES. [2022-12-13 14:37:46,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201192 conditions, 85661 events. 62206/85661 cut-off events. For 32788/32788 co-relation queries the response was YES. Maximal size of possible extension queue 2282. Compared 585346 event pairs, 39219 based on Foata normal form. 46/85590 useless extension candidates. Maximal degree in co-relation 201156. Up to 17029 conditions per place. [2022-12-13 14:37:46,296 INFO L137 encePairwiseOnDemand]: 525/532 looper letters, 520 selfloop transitions, 55 changer transitions 0/581 dead transitions. [2022-12-13 14:37:46,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 581 transitions, 3800 flow [2022-12-13 14:37:46,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 14:37:46,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 14:37:46,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5158 transitions. [2022-12-13 14:37:46,305 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.440704032809296 [2022-12-13 14:37:46,306 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5158 transitions. [2022-12-13 14:37:46,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5158 transitions. [2022-12-13 14:37:46,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:37:46,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5158 transitions. [2022-12-13 14:37:46,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 234.45454545454547) internal successors, (5158), 22 states have internal predecessors, (5158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:46,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 532.0) internal successors, (12236), 23 states have internal predecessors, (12236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:46,319 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 532.0) internal successors, (12236), 23 states have internal predecessors, (12236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:46,319 INFO L175 Difference]: Start difference. First operand has 102 places, 91 transitions, 738 flow. Second operand 22 states and 5158 transitions. [2022-12-13 14:37:46,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 581 transitions, 3800 flow [2022-12-13 14:37:46,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 581 transitions, 3709 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:37:46,344 INFO L231 Difference]: Finished difference. Result has 133 places, 112 transitions, 1123 flow [2022-12-13 14:37:46,344 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1123, PETRI_PLACES=133, PETRI_TRANSITIONS=112} [2022-12-13 14:37:46,345 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 62 predicate places. [2022-12-13 14:37:46,345 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 112 transitions, 1123 flow [2022-12-13 14:37:46,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 211.04545454545453) internal successors, (4643), 22 states have internal predecessors, (4643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:46,346 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:37:46,346 INFO L209 CegarLoopForPetriNet]: trace histogram [12, 1, 1] [2022-12-13 14:37:46,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-13 14:37:46,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:37:46,547 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:37:46,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:37:46,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1314105333, now seen corresponding path program 3 times [2022-12-13 14:37:46,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:37:46,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180769122] [2022-12-13 14:37:46,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:37:46,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:37:46,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:37:46,554 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:37:46,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-13 14:37:46,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-13 14:37:46,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:37:46,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 14:37:46,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:37:47,033 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 14:37:47,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 14:37:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:37:47,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:37:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:37:51,901 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:37:51,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180769122] [2022-12-13 14:37:51,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180769122] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:37:51,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:37:51,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2022-12-13 14:37:51,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112967442] [2022-12-13 14:37:51,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:37:51,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 14:37:51,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:37:51,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 14:37:51,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-12-13 14:38:23,200 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 532 [2022-12-13 14:38:23,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 112 transitions, 1123 flow. Second operand has 28 states, 28 states have (on average 211.0) internal successors, (5908), 28 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:23,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:38:23,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 532 [2022-12-13 14:38:23,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:38:40,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:38:42,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:38:44,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:38:46,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:38:48,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:38:50,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:38:52,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:38:54,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:38:56,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:38:58,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:39:00,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:39:02,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:39:28,457 INFO L130 PetriNetUnfolder]: 62220/85689 cut-off events. [2022-12-13 14:39:28,457 INFO L131 PetriNetUnfolder]: For 32410/32410 co-relation queries the response was YES. [2022-12-13 14:39:28,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201676 conditions, 85689 events. 62220/85689 cut-off events. For 32410/32410 co-relation queries the response was YES. Maximal size of possible extension queue 2279. Compared 586466 event pairs, 39219 based on Foata normal form. 14/85586 useless extension candidates. Maximal degree in co-relation 201627. Up to 21958 conditions per place. [2022-12-13 14:39:29,101 INFO L137 encePairwiseOnDemand]: 525/532 looper letters, 413 selfloop transitions, 85 changer transitions 0/504 dead transitions. [2022-12-13 14:39:29,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 504 transitions, 3779 flow [2022-12-13 14:39:29,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 14:39:29,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-13 14:39:29,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 6551 transitions. [2022-12-13 14:39:29,109 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4246175784288307 [2022-12-13 14:39:29,109 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 6551 transitions. [2022-12-13 14:39:29,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 6551 transitions. [2022-12-13 14:39:29,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:39:29,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 6551 transitions. [2022-12-13 14:39:29,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 225.89655172413794) internal successors, (6551), 29 states have internal predecessors, (6551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:39:29,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 532.0) internal successors, (15960), 30 states have internal predecessors, (15960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:39:29,125 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 532.0) internal successors, (15960), 30 states have internal predecessors, (15960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:39:29,125 INFO L175 Difference]: Start difference. First operand has 133 places, 112 transitions, 1123 flow. Second operand 29 states and 6551 transitions. [2022-12-13 14:39:29,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 504 transitions, 3779 flow [2022-12-13 14:39:29,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 504 transitions, 3650 flow, removed 31 selfloop flow, removed 7 redundant places. [2022-12-13 14:39:29,155 INFO L231 Difference]: Finished difference. Result has 155 places, 143 transitions, 1538 flow [2022-12-13 14:39:29,155 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=1036, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1538, PETRI_PLACES=155, PETRI_TRANSITIONS=143} [2022-12-13 14:39:29,155 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 84 predicate places. [2022-12-13 14:39:29,156 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 143 transitions, 1538 flow [2022-12-13 14:39:29,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 211.0) internal successors, (5908), 28 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:39:29,156 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:39:29,156 INFO L209 CegarLoopForPetriNet]: trace histogram [20, 1, 1, 1] [2022-12-13 14:39:29,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-13 14:39:29,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:39:29,358 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:39:29,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:39:29,359 INFO L85 PathProgramCache]: Analyzing trace with hash -737128445, now seen corresponding path program 2 times [2022-12-13 14:39:29,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:39:29,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735261274] [2022-12-13 14:39:29,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:39:29,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:39:29,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:39:29,364 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:39:29,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-13 14:39:29,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:39:29,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:39:29,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 14:39:29,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:39:29,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 14:39:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:39:30,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:39:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:39:38,975 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:39:38,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735261274] [2022-12-13 14:39:38,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735261274] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:39:38,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:39:38,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2022-12-13 14:39:38,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726076186] [2022-12-13 14:39:38,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:39:38,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 14:39:38,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:39:38,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 14:39:38,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1366, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 14:41:13,463 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 532 [2022-12-13 14:41:13,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 143 transitions, 1538 flow. Second operand has 44 states, 44 states have (on average 213.02272727272728) internal successors, (9373), 44 states have internal predecessors, (9373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:41:13,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:41:13,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 532 [2022-12-13 14:41:13,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:41:35,632 WARN L233 SmtUtils]: Spent 7.25s on a formula simplification that was a NOOP. DAG size: 228 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:41:39,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:41:41,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:41:43,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:41:45,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:41:47,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:41:49,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:41:51,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:41:53,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:41:55,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:41:57,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:41:59,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:42:01,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:42:03,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:42:05,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:42:07,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:42:09,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:42:11,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:42:13,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:42:15,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:42:17,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 14:42:28,872 WARN L233 SmtUtils]: Spent 8.08s on a formula simplification that was a NOOP. DAG size: 218 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:42:37,181 WARN L233 SmtUtils]: Spent 5.87s on a formula simplification that was a NOOP. DAG size: 207 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:42:52,656 WARN L233 SmtUtils]: Spent 5.99s on a formula simplification that was a NOOP. DAG size: 185 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:44:16,176 INFO L130 PetriNetUnfolder]: 140140/192654 cut-off events. [2022-12-13 14:44:16,176 INFO L131 PetriNetUnfolder]: For 92711/92711 co-relation queries the response was YES. [2022-12-13 14:44:17,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453327 conditions, 192654 events. 140140/192654 cut-off events. For 92711/92711 co-relation queries the response was YES. Maximal size of possible extension queue 2313. Compared 1346337 event pairs, 88140 based on Foata normal form. 88/192625 useless extension candidates. Maximal degree in co-relation 453276. Up to 38787 conditions per place. [2022-12-13 14:44:17,778 INFO L137 encePairwiseOnDemand]: 526/532 looper letters, 1145 selfloop transitions, 98 changer transitions 0/1249 dead transitions. [2022-12-13 14:44:17,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 1249 transitions, 8825 flow [2022-12-13 14:44:17,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 14:44:17,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-13 14:44:17,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 10491 transitions. [2022-12-13 14:44:17,789 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4481801093643199 [2022-12-13 14:44:17,789 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 10491 transitions. [2022-12-13 14:44:17,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 10491 transitions. [2022-12-13 14:44:17,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:44:17,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 10491 transitions. [2022-12-13 14:44:17,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 238.4318181818182) internal successors, (10491), 44 states have internal predecessors, (10491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:17,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 532.0) internal successors, (23940), 45 states have internal predecessors, (23940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:17,813 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 532.0) internal successors, (23940), 45 states have internal predecessors, (23940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:17,813 INFO L175 Difference]: Start difference. First operand has 155 places, 143 transitions, 1538 flow. Second operand 44 states and 10491 transitions. [2022-12-13 14:44:17,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 1249 transitions, 8825 flow [2022-12-13 14:44:17,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 1249 transitions, 8506 flow, removed 87 selfloop flow, removed 24 redundant places. [2022-12-13 14:44:17,870 INFO L231 Difference]: Finished difference. Result has 197 places, 168 transitions, 1815 flow [2022-12-13 14:44:17,870 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1815, PETRI_PLACES=197, PETRI_TRANSITIONS=168} [2022-12-13 14:44:17,871 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 126 predicate places. [2022-12-13 14:44:17,871 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 168 transitions, 1815 flow [2022-12-13 14:44:17,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 213.02272727272728) internal successors, (9373), 44 states have internal predecessors, (9373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:17,872 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:44:17,872 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:44:17,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-12-13 14:44:18,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:44:18,073 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 14:44:18,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:44:18,074 INFO L85 PathProgramCache]: Analyzing trace with hash -2128687773, now seen corresponding path program 1 times [2022-12-13 14:44:18,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:44:18,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648831028] [2022-12-13 14:44:18,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:44:18,076 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:44:18,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:44:18,079 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 14:44:18,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d079c832-f3ef-4b24-9703-6f76ddafcb22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-13 14:44:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:44:18,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:44:18,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:44:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:44:18,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:44:18,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:44:18,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648831028] [2022-12-13 14:44:18,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [648831028] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:44:18,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:44:18,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:44:18,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000149853] [2022-12-13 14:44:18,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:44:18,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:44:18,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:44:18,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:44:18,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:44:18,397 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 532 [2022-12-13 14:44:18,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 168 transitions, 1815 flow. Second operand has 5 states, 5 states have (on average 230.8) internal successors, (1154), 5 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:18,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:44:18,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 532 [2022-12-13 14:44:18,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand